Engineering Knowledge Test

Previous Year Question Papers

By

SSBCrack.com

&

SSCrackExams.com

THE FOLLOWING QUESTIONS ARE A MIX OF

EKT QUESTIONS OF PREVIOUS YEARS (UPTO 25 OCT 2009)

+

FTS (EKT) EXAMINATIONS (UPTO 7 NOV 2009)

+

MODEL QUESTIONS AT THE SITE www.ssbcrack.com

DISCLAIMER:

The answers may not be correct try to search on the Internet to get more accurate answers. Also few questions are unsolved; if you know the answers share it with others.

All the questions are memory based and may differ from actual questions but if you prepare them you will clear your EKT for sure as mentioned by the followers. All the best

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SECTION-1

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1. Sampling is helpful for-------------------------------------------------------------------------------------------quantisization

2. Sound waves are (It came in both papers)----------------------------------------------------------------------

longitudinal

a .Longitudinal b. Transverse c. Electro magnetic d. Gravitational

3. If two identical capacitors connected parallel then effective capacitance..?----------------------------------C=C1+C2

4. Wein bridge is used to measure---------------------------------------------------------------------------------frequencies

5. Which configuration has min distortion..?-----------------------------------------------------------------------class A

a. CLASS A b. CLASS B c. CLASS C d. CLASS AB

6. Which of the following is not system software..?----------------------------------------------------------------

compiler

a. Linker b. Loader. c. Compiler d. none

7. Min No, of NAND gates required to realize the function AB------------------------------------------------------2

8. Flip Flops mainly used for----------------------------------------------------------------------------------------memory elements

9. Which is noise free------------------------------------------------------------------------------------------------FM

a. AM b. FM.. c. Both d .none

10. Terrestrial TV propagation System used in India---------------------------------------------------------------PAL

a. PAL b. NTSC c. DFS

11. Skin depth of an waveguide doesnt depend on----------------------------------------------------------------temperature

a. freq b. temp c .length of the conductor d.Type of material

12. Transformer rating expressed in-------------------------------------------------------------------------------kilo Volt-ampere (KVA)

13. Electrical energy can be measured using----------------------------------------------------------------------kilo watt-hour (kWh)

14. An ideal opamp has---------------------------------------------------------------------------------------------Infinite B.W

15. Restivity range of semiconductor------------------------------------------------------------------------------10 ^ -4 to 10 ^7

16. They give modulation index, carrier power ask us to find total power---------------------------------------Pt=Pc(1+(m*m/2))

17. In JFET if Vds increased what happen to Ids.?----------------------------------------------------------------Ids decreases

18. They give some freq and ask us to find Image Freq?------------------------------------------------------Fi=F(given)+2(I.F=455kHz)

19. In an Unbiased semiconductor the current is zero because of-----------------------------------------------

transistor in cut-off region

20. If BJT is in Cutoff region---------------------------------------------------------------------------------------across load

A. Max voltage appears across load

B. a.Max voltage appears across Transistor.

21. Decibel used to measure--------------------------------------------------------------------------------------power level

a. power b. voltage c .current d .power level

22. In RC coupling the value of C should be high because-----------------------------less reactance--signal couples well---no distortion of signal

23. An ideal voltage source charges capacitor in----------------------------------------------------------------instantaneously

24. They give Vmax and Vmin and ask us to find modulation index?--------------------------------------------m= ((Vmax-Vmin}/ (Vmax+Vmin)

25. A voltage source of 5v with internal resistance 2 ohm can transfer max power to load when the value of load resistance is-----2 ohm

26. In a communication system, noise is most likely to get into the system

(A) At the transmitter

(B) In the channel============answer

(C) In the information source

(D) At the destination

27. When modulation frequency is doubled, the modulation index is halved, and the modulating voltage remains constant, the modulation system

(A) Amplitude modulation

(B) Phase modulation

(C) Frequency modulation==========answer

(D) Angle modulation

28. Impedance inversion may be obtained with

(A) A short ? circuited stub

(B) An open ? circuited stub

(C) A quarter ? wave line================answer

(D) A half ? wave line

29. HIGH frequency waves are

(A) Observed by the F2 layer

(B) Reflected by D layer===========answer

(C) Capable of use for long-distance communication on the moon

(D) Affected by the solar cycle

30. Which one of the following terms does not apply to the Yagi-uda array?

(A) Good band width

(B) Parasitic elements

(C) Folded dipole

(D) High gain============answer

31. A duplexer is used

(A) To couple two different antennae to a transmitter without mutual interference

(B) To allow one antenna to be used for reception or transmission without mutual interference========answer

(C) To prevent interference between two antennae when they are connected to receiver

(D) To increase the speed of the pulses in the pulsed radar

32. Indicate which of the following system is digital

(A) Pulse ? Position modulation

(B) Pulse ? Code modulation=========answer

(C) Pulse ? Width modulation

(D) Pulse ? Frequency modulation

33. A forward error correcting code corrects errors only

(A) Requiring partial retransmission of the signal

(B) Requiring retransmission of entire signal

(C) Using parity to correct to errors in all cases

(D) Requiring no part of the signal to be transmitted==========answer

34. A typical signal strength received from a geosynchronous communication satellite is of the order of

(A) A few milli watts

(B) Kilo watts

(C) Watts

(D) Few pico watts========answer

35. Telephone traffic is measured

(A) With echo cancellers

(B) By the relative congestion

(C) In terms of the grade of service

(D) In erlangs===================answer

36. Positive logic in a logic circuit is one in which

(A) Logic 0 and 1 are represented by 0 and positive voltage respectively==========answer

(B) Logic 0 and 1 are represented by negative and positive voltages respectively

(C) Logic 0 voltage level in higher than logic 1 voltage level

(D) Logic 0 voltage level is lower than logic 1 voltage level

37. A half-adder can be made from

(A) Two NAND gates

(B) A NOT gate and an OR gate

(C) An AND gate and an OR gate

(D) An AND gate and an X-OR gate=========answer

38. Which of the following devices has its characteristics very close to that of an ideal current source?

(A) Field effect transistor

(B) Transistor in common bas mode

(C) Zener diode============answer

(D) MOSFET

39. The main use of a common base transistor amplifier is

(A) As voltage amplifier===============answer

(B) Current amplifier

(C) For matching a high source impedance to a low load impedance

(D) For rectification of a.c. signal

40. A class-B amplifier is biased

(A) Just at cut-off===============answer

(B) Nearly twice cut-off

(C) At mid point of load line

(D) so that IB equals jut IC

41. If the peak transmitted power in a radar system is increased by a factor of 16, the maximum range

will be increased by a factor of

(A) 2 (B) 4 (C) 8 (D) 16=========== 2

42. A high PRF will (indicate the false statement)

(A) Make the returned echoes easier to distinguish from noise=======answer

(B) Make target tracking easier with conical scanning

(C) Increase the maximum range

(D) Have no effect of the range resolution

43. A solution to the ?blind speed? problem in a radar system is to

(A) Change the Doppler frequency

(B) Vary the PRF==============answer

(C) Use mono pulse

(D) Use MTI

44. The number of active picture elements in a television image depends on

(A) Fly back time======================answer

(B) CRT screen size

(C) Received band width

(D) FB ratio of receiver antenna

45. In a color TV, the three primary colors are

(A) Red, orange and blue

(B) Red, blue and green=============answer

(C) Red, green and yellow

(D) Red, orange and green

46. Polarization in a dielectric is given by===========P=(1-x)E

A. P=xE B. P= (1-x) E C.P= xeE e=permivity...x=suspectance

47.ht of geostationary satellite----------------------------------------------------------------------------------------------

36000 Km

48.minimum freq range of satellite comm-----------------------------------------------------------------------------------C-band(3.7-4.2MHz)

49.what happens to D-layer at day_time------------------------------------------------------------------------------------

ionization/absorption of signals

50.the nyquist rate of sampling is ----(2Fmax,Fmax,1/2Fmax,etc)------------------------------------------------------

2Fmax

51.how many electrons does the donor impurity phosphorus continue---(1,2,3,4)--------------------------------------1

52.transmission of light through optical fiber works on principle of ---(total internal reflection,total internal refraction,etc)-------reflection

53.SHF can be used for ---(radio,satellite,surface wave)-----------------------------------------------------------------satellite

54.deviation finding in fm ?--------------------------------------------------------------------------------------------------Phase locked loop (PLL circuit)

55.no. of frames in indian pal system ?--------------------------------------------------------------------------------------25 frames/second

56.which radar measure velocity ,height n distance ?----------------------------------------------------------------------CW DOPPLER radar (not simply CW)

57.when transistor in cut-off or saturation,the circuit behaves independent of transistor-------

options----variation,stage,etc-------------------------- stage..cos it behaves like a switch and effect of transistor stage is equivalent to switch

58.If efficiency of amplifier is 80% then its definately---(class A,B,AB,C)-----------------------------------------------C

59.buffer is useful for---(isolation of stages,emitter follower configuration,etc)----------------------------------------isolation of stages

60.for transmission of MW radio.we use---(dipole,antennae on vertical masts,etc)------------------------------

---------vertical masts

61.the most severe effect of noise is seen in---(transmitter,channel,receiver,etc)----------------------------------------channel

62.if freq deviation is 15KHZ,modulation signal 75 Khz,then theoretical BW i upto 8th component---(150,240,480,etc)--150

63.Balanced modulator is used for removal of---(carrier,USB,LSB,etc)-----------------------------------------------------carrier

64.In open loop systems,control signal depends upon---(human reference,independent of output,cannot be determined,etc)----------ind of out

65.the laplace transform of 't'---(s,s^2,1/S^2,etc)------------------------------------------------------------------------1/s^2

66.at what freq is attenuation highest in optic-fiber------------------------------------------------------------------------around 600 nm

67.when CCIR-B blanks signalduring vertical OR horizontal retrace???-------------------------------------------------vertical

68.Modulation of amplitude includes-CHANGE IN AMPLITUDE,change in freq,both,other----------------------

-----------amplitude change

69.Base of transistor is-HIGHLY,heavily,moderately,not doped-----------------------------------------------------------moderately

70.CMRR for ideal Diff Amplifier is-0,unity,less,MORE THAN UNITY---------------------------------------------------

-----more than 1 (infact infinity)

71.At absolute zero,valence electrons occupy---(valence band,forbidden band,conduction band,valence electrons disappear)----------val band

72.the transition region in a unbiased diode consists of---(free charges,immobile carriers,minority carriers,etc)------immobile

(already solved above)

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>

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SECTION-2

>>>>

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1.horse power is unit of--------------------------------------------------------------------------------------------------------power

2.electron volt is unit of:-------------------------------------------------------------------------------------------------------energy

3.what is nibble-----------------------------------------------------------------------------------------------------------------4bits

4.centroid is concerned with: mass,mass and weight,plane area-------------------------------------------------------------plane area

5.which is most effective nuclear power plant or thermal power plant-------------------------------------------------------nuclear

6.ignition quality of petrol is measured by:-----------------------------------------------------------------------------------octane number

7.primary battery is:reversible process,irreversible process----------------------------------------------------------------irreversible

8.what a catalyst will do--------------------------------------------------------------------------------------------------------

increase the reaction rate

9.what is applied when opening a lock with key:coplaner force,noncoplaner force,lever,torque----------------------------torque

10.when jet engine has most power:while leaving earth,atmosohere------------------------------------------------

----------inc wd altitude

11.what represents the current:left hand,right hand,thumb.--------------------------------------------------------------------thumb

12.magnetic flux density---------------------------------------------------------------------------------------------------------weber

13.noise is measured as:pitch,decibel-----------------------------------------------------------------------------------------

--decible

14.aluminum alloy is used in piston:it is light,it is strongest,it is shock less,less wear off------------------------------------light

15.when a light is passed through a higher refractive index what will happen------------------------------------------------velocity decrease

16. Capacitance of a cell measured in?----------------------------------------------------------------------------farad

17.To made House use electric heater which metal/element is better?-----------------------------------------aluminium

18. Internal resistance of ideal current source?-----------------------------------------------------------------infinite

19. Integral of (dx / (xlogx))?------------------------------------------------------------------------------------log(log x)+c

20. Earth &geostationary satellites have same /relative-------------------------------------------------------angular velocity

a.accleraton b.velocity c.angular velocity

21. Sound waves are----------------------------------------------------------------------------------------------longitudinal

A .Longitudinal B. Transverse C both D .neither.

22. Demultiplxer can called as?------------------------------------------------------------------------------ data distributor

23. Set of instructions meant for to do some task is called.----------------------------------------------------Programme

24. Properties Alkali metals.----------------------------------------------------------------------------------- * Lower densities than other metals

* One loosely bound valence electron

* Largest atomic radii in their periods

* Low ionization energies

* Low electronegativities

* Highly reactive

25. Break down occurs in diode because of.-------------------------------------------------------------------avalanche breakdown( more than 10 V)

26. If u wants to connect two systems through telephone line which of the following u will use..?----------

modem

A. Bus B.Modem C.Router

27. Inductor opposes sudden changes in---------------------------------------------------------------------Current

28. Which is not a non renewable energy---------------------------------------------------------------------wind

energy

a. petrol b.Coal c.Wind energy d.nuclear

29. Which material is widely used for making solar cell?----------------------------------------------------silicon

30. Cell converts.---------------------------------------------------------------------------------------------chemical to

electrical

A. Chemical energy into electric energy

B. electric energy into chemical energy

31. Steel pipes made from-----------------------------------------------------------------------------------galvanized iron

32. Human being is------------------------------------------------------------------------------------------closed loop

system with multiple feedback

A. open loop sysm

B.closed loop sysm with single feed back.

C. closed loop sysm with multiple feed back.

33. If the gain of the open loop sysm is doubled then gain margin will become-------------------------doubled

34. Corrosion of aluminum is not formed because of------------------------------------------------------epoxy paint

35. If the speed flow in pipe of diameter 6 mm is 5m/s.If this pipe is connected to another of diameter 3

mm, then speed will be---10m/s

36. They give change in force and change in diameter of a square plate. Ask us to find change in

pressure---(change in area/change in area)

37. They give three sets of measurements .Which are sets forms triangle------------------the one where a+b>c where a,b,c are sides taken in any order

38. First aid of electrical shock victim----------------plug-off power-------move victim by a wooden stick or dry clothes sideways

39. The performance (function) of fuse doesnt depend on-------------------------------(depends on both..so methinks options are incomplete)---

a. Type of material b .Length of the material..

40. Annealing makes the material... (Effect of annealing)----------------------------------heat treatment to improve softness and ductility

41. what does the symbol "j" represents in vector----------------------------90 degree anticlockwise movement (imaginary-axis)

42. Sulphation in Lead acid battery--------------------------------------crystalline lead sulphate---affects charge storing capacity--slows charging up time

43. Transient current------------------------------------------------------------sharp fluctuation of current

44. Principle of hydrogen bomb--------------------------------------------------nuclear fusion

45. radio activity is the property of----------------------------------------------elements with atomic no greater

than 82 (Pb)

46. above curie temperature, magnetic material will become-------------------non magnetic or magnetic

insulator

47. series circuit current----------------------------------------------------------is same throughout (I=I1=I2=I3=In)

48. byte= ___ bits-----------------------------------------------------------------8

49. Control and arithmetic logic section is known as-----------------------------CPU

50.Micro computer is a ----------------------------------------------------------personal computer

51.power factor of a resistor----------------------------------------------------1

52.hexadecimal digit-------------------------------------------------------------0-9,A-F

53.fluorescent tube related qn---------------------------------------------------choke coil

54.change in dimension during the process of magnetisation------------------magnetostriction

55.in nuclear reaction , conservation of-----------------------------------------mass and energy both

56.unit of inductance-------------------------------------------------------------henry

57.petrol in india ..octane no.?---------------------------------------------------90-95 (generally 91)

58.controlling device for small load?? [related to servo motor etc.]------------potentiometer

59.viscosity of gas directly proportional to-------------------------------------square root of temperature

60.instruments to have wide range of scale------------------------------------logarithmic scale

61.rating of electrolytic capacitor-----------------------------------------------farads

62.name of electric motor-both rotor and stator rotating at equal speed------synchronous motor

63.in reversible adiabatic process, change in entropy?-------------------------0

64.calory is a measure of??------------------------------------------------------heat energy

65.compressed air inside a tire, what will happen if air passes through a hole??------adiabatic process

66.work done in adiabatic change in gas----------------------------------------(P1V1-P2V2)/(gamma-1) or nR(T1-T2)/(gamma-1)

===========================================================================================

67. related to carnot cycle in carnot engine

68.maximum efficiency of carnot engine

here is a brief summary of the 4-steps of carnot cycle

Heat transfer from the working fluid to the low-temperature reservoir (Condenser).

Adiabatic increase in the temperature of the working fluid (Heat Pump).

Heat transfer from the high-temperature reservoir to the working fluid (Boiler).

Adiabatic decrease in the temperature of the working fluid (Turbine).

An important conclusion from Carnot cycle analysis is that the maximum theoretical efficiency of heat engines is directly related to:

efficiency = D(T2-T1)/T2

where:

T2 is the maximum operating temperature on absolute scale (K)

T1 is the minimum operating temperature on absolute scale (K)

For a heat engine operating between 300oC and 100oC, with a DT of 200 degrees, this maximum

efficiency would be:

efficiency = 200/(300 + 273) x 100 = 34.9%

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69.something related to mix of ice and water-------------------------------------------all exists at triple -point

70.efficiency of otto cycle----------------------------------------------------------------60 %

71.floating battery bus or something----------------------------------------------------used in IC engines

72.longitudinal wave prorogation--------------------------------------------------------compression and

rarefraction

73.unexcited single phase synchronous motor------------------------------------------called as repulsion induction motors

74.inductance related question

75.advantage of sampling

a) simple ckt

b) high speed transmission data=============================================================answer

c) all of the above

76.capacity of ecetrical cell

a) Watth ==============================================================================answer

b)Watt

c)ampere

d) amp/hr

77.metal to be used in electric heater

a)copper

b)nichrome============================================================================answer

c) platinum

d) tungstun

78.computer ic works efficiently because

a) top-bottom

b) system

c)two stage

d) 2 state

79.func of fuse wire does not depend upon

a) itd length

b) its radius============================================================================answ

er

80.material of spring should be----------------------------------------------------------------------------------------------steel with high carbon variety

81.skin effect does not depend upon---------------------------------------------------------------------------------------size of wire

82.aluminium does not corrode with atmosphere------------------------------------------------------------molecular level stability (but it does corrode in extreme enviroments like acids...but slowly)

83.thyrister is also termed as

a) dc switch

b) ac switch============================================================================ans

wer

c)both a& b

d) square wave switch

84.steel pipes are made through which welding----------------------------------------------------------------------------arc welding

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85.a particle whose motion is described by x=asinwt, y=asinwt z=ut moves along

a) screw path with constant velocity and increase in accelaration

b) screw path with constant velocity and accelaration

c) screw path with increased velocity and accelaration

d) screw path with decreased velocity and increased accelaration

Answer is 'C' however if the question is x=asinwt,y=acoswt,z=ut...the answer will be 'B'

the answer can be arrived by finding d/dx,d/dy,d/dz which are Vx,Vy,Vz then finding resultant using sqrt(Vx^2+Vy^2+Vz^2)

similairly again by differentiating we obtain Ax,Ay,Az components of Acc'n...then find their resultant ..similiarly

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86. name ,numbers to be given to evaluate instructions

a) program

b)instruction

c)data================================================================================= answer

87. unit of inductance and capacitance--------------------------------------------------------------------------------------Henry and Farad respectively

88.why condenser used in tube light?---------------------------------------------------------------------------------------

current discharge

89.period of geostationary satellite---(3 hrs,10 hrs,24 hrs,etc)----------------------------------------------------------24

90.how many geostationary satellites to cover entire earth---(2,3,4,etc)------------------------------------------------3

91.Unit of magnetic field intensity---(A/m,A/m^2,A-m,etc)--------------------------------------------------------------

A/m

92.what parameters control the state of gas--(P,V,T,all)------------------------------------------------------------------

all

93.Body absorbing all radiations------------------------------------------------------------------------------------------PERFECTLY BLACK BODY.

94.Black Body--------------------------------------------------------------------------------------------------------------ABSORBS/transmits all radns.

95.Emmisivity of white body is--------------------------------------------------------------------------------------------

HIGHER than black body.

96.Hookes law states that stress is proportional to----------------------------------------------------------------------

STRAIN.

97.if on insertion of dielectric,energy stored becomes one fifth..then dielectric strength is---(5,1/5,25,1/25)--------5

98.A material having resistivity=2 times copper covers a copper metal sheet of same thickness of

resistance 2 ohm ,then resistance of composite sheet is---(6,2/3,4/3,3/4)--------------------------------------------------------------------------------------------------------3/4

99.the prominent force in an atom is ---(gravitational,nuclear,electrostatic,etc)----------------------------------------nuclear

100.As compared to a thermal plant,nuclear plant is---(more effecient,less effecient,depends upon

material,etc)------more effecient

101.if multiplication of n numbers is 1,then their sum ---(n(n+1)/4,divisible by n,1,always less than n)------------------always less than n

102.the material used in solar cells is---(germanium,silicon,etc)-------------------------------------------------------

-----si

103.in primary cell---(chemical reactions are reversible,irreversible,etc)--------------------------------------------------irreversible

104.The unit of charge is---(coulomb,ampere,etc)-------------------------------------------------------------------------coulomb

105.Two taps A(requires 15 mins to fill a tank) and B(12 mins), time required to fill d tank if both taps

used ?--------(20/3) mins

106.IR depends on-R VALUE,dirn of current flow,none,ALL--------------------------------------------------------------

---??????

107.1st law of thermodynamics based on-----------------------------------------------------------------------------------LAW OF CONSVN OF ENERGY.

108.Diesel Quality by--------------------------------------------------------------------------------------------------------

CETANE NO.

109.Internal Energy Dir Prop to-VOL,pr,temp,none------------------------------------------------------------------------

-temp

110.Brayton Cycle is-CONST PR, vol,temp,other----------------------------------------------------------------------------

Const pressure

111.For Const Vol cycle work done is---------------------------------------------------------------------------------------0.(work=P*change in volume)

112..the first sub-shell has the capacity of how many electrons---(2,4,1,8)------------------------------------------

-----2

113..to prevent short circuit of surface waves, the polarization used is---(vertcal,horizontal,circular,etc)--------------circular

114..when ray of light enters a medium of higher refractive index,velocity---(increases,decreases,remains same,etc)----slower

115.iron cores in transformers are laminated to prevent---(eddy current,copper loss,etc)------------------------------eddy loss

116.Wein bridge is used to measure---(resistance,frequency,capacitance,inductance)----------------------------------capacitance

117.which circuit is current transeint,,,,L,C,R--------------------------------------------------------------------------------L

118.what happens above curie temperature..(sometin related to dia,para,ferromagnetism)------------------

-----------magnetism is lost-- material becomes paramagnetic

119.why radioactivity of elements-------------------------------------------------------------------------------------------

nuclear fission

120.principle of hydrogen bomb---------------------------------------------------------------------------------------------nuclear fusion

121..aluminum is used to make engine and pistons cos---(light,shock resistant)--------------------------------------------light

122.tolerance of gold band in resistor---(2%,5%,10%,20%)----------------------------------------------------------------5

123.if diameter of two pipes in ratio 2:1 and velocity 1:2,then volume per unit second---(1:8,8:1,2:1etc)--

---------------2:1

124.Magnetic tapes can be used for--- (input,secondary-storage,all) ------------------------------------------------------all

125.COMPONENT j IF COUNTERCLOKWISE THAN WAT IS ITS ANGLE?---------------------------------------------------------90 degrees

126.KIRCHOFFS LAWS APPLICABLE TO WHICH ? A.C OR D.C ?----------------------------------------------------------

--------both

127.S.P,D,F FORMAT OF BERILLIYIUM N COBALT?-------------------------------------------------------------------------

-----berillium--1s2 2s2

cobalt----[Ar]

4s2 3d7

128.HEAT IS MEASURED IS WAT ?----------------------------------------------------------------------------------------------calories

129.eddy currents can be minimized how ?----------------------------------------------------------------------------------

core lamination

130.poles of magnet can be measured by which rule ?----------------------------------------------------------------------right hand rule

131.OCTANE % OF INDIAN PETROL ?-------------------------------------------------------------------------------------------90-95 (91 generally)

132.In RLC ckt,during resonance, impedance is-MIN,max,0,other.----------------------------------------------------------minimum (purely resistiv

133.Momentum unit same as--------------------------------------------------------------------------------------------------

IMPULSE (Ns)

144.PE is highest at WHEN OBJECT thrown IS AT----------------------------------------------------------------------------Max height

145.Curve y=sinx at x=0 and x=pi/4 is -------------------------------------------------------------------------------------0 and 1/(sqrt(2))

146.Kirchoffs Law for current is rel to-ELECTRIC CKT,junction,closed loops,electronic ckt-----------------------

---------junction

147.Weight of a person is max at--------------------------------------------------------------------------------------------

Surface of earth

148.what is motor called when its stator rotates at same speed as its actuator--------------------------------------------syncronized motor

Key of sample paper from IAF EKT

here is the answer key for GENERAL ENGINEERING

1B 2A 3B 4A 5A 6B 7A 8B 9C 10B

11B 12A 13A 14B 15C 16D 17A 18D 19A 20C

21A 22B 23D 24B 25C 26C 27B 28D 29D 30A

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SECTION-3

which is sequential access device?

magnetic tape

magnetic drive

all of the

above===========================================================================answer

what does structural lang do?

reduces the structure of prog.

can be read by only programmer.

all of the

above===========================================================================???

set of instructions--------------------------------------------------------------------------------------------------------------

program

BCD is used to convert

binary

decimal=================================================================================answer

Ascii

recursion is used in========================================================================???

stack

queue

link list

all of the above

which is offline

device======================================================================???

connected to cpu

not connected to cpu

direct storage

all of the above.

half adder is used

ans 3,carry

in a simple binary tree node is defined as

n

n-1

n-2

n/2

if nibble is transferred at rate 128 then

32

64=====================================================================================answer

256

240

what does fan out means--------------------------------------------------------------------------------------------------------

Number of components that an IC can drive at its output

BCD is:

encoder==================================================================================answer

decoder

multiplexer

demultiplexer

one input many output

encoder

decoder

multiplexer

demultiplexer=============================================================================answer

nand and nor gate is result of how many gates?

which is not a correct equation of boolean alzabra:

A+0=A

A+A=A

A+1=1

X=+1====================================================================================answer

lowest power dissipitation

CMOS================================================================================

====answer

TTL

MOSFET

ECL

first generation computer used

valves================================================================================

===answer

Transistor

ICs

SSI

low pass filter is

Integrator=============================================================================

===answer

differentiator

Comparator

microprocessor and microcomputer providing access to many use---------------------------------------------------

-------- multi-user system

Which configuration has min distortion

class a===================================================================================answer

class b

class c

class d

which memory need to be refreshed everytime

dynamic

ram===============================================================================answer

static ram

prom

rom

cpu consists of

Arithmetic and logical

unit=====================================================================answer

timing and control unit

all of the above

where data is stored in cpu.

Register==============================================================================

====answer

flip flop

one question was like some thing to transfer through bus then which will be used:

DMA=================================================================================

====answer

Interrupt vector

one circuit was given

and option were

differentiator----------------------------------------------------------------------------------------------------------------------high pass filter

Integrator-------------------------------------------------------------------------------------------------------------------------

low pass filter

What doesnt assembler do

Store the code

Convert into machine code

Some option--------------------------------------------------------------------------------------------------------------(dis

option HAS to be the answer)

All of the above

Moving of data from main memory to secondary memory

Swapping==================================================================================answer

Spooling

Exchange

Some option

One question based on storage with option

CCDs=====================================================================================answer

Disk

Tape

When the flip flop is high------SET--------When low -----------------------------------------------------------------------------reset

2) A BYTE= BITS ?------------------------------------------------------------------------------------------------------------8

9)Octal repn for 11111010-81,372,78,other--------------------------------------------------------------------------------

372

2)Which is d 1st Computer--------------------------------------------------------------------------------------------------

UNIVAC

3)CPU consists of------------------------------------------------------------------------------------------------------------ALU & CONTROL UNIT

4)For registering instructions in computer---------------------------------------------------------------------------------INDEX REGISTER

5)Which is d 1st generation computers-MAGNETIC TAPE,vaccuum tubes,minicomputers,all.-----------------------------vaccum tubes

6)Which is for code of instructions------------------------------------------------------------------------------------------

ASCII

Key of sample paper from IAF EKT

here is the answer key for specialist.....COMPUTERS

1C 2C 3D 4C 5B 6A 7B 8A 9D 10C

11C 12A 13B 14 15D 16D 17 18A 19D 20C

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SECTION-4

>>>>>>

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1) zeroth law of thermodynamics-----------------------------------------------------------------------------------------------

-thermal equilibrium of bodies

2) manganese in steel makes it: ductile, malleable, harder--------------------------------------------------------------------harder

3) efficiency of jet at altitude :increases, decreases,--------------------------------------------------------------------------increases

4) volume of surface shrinks cos of: adhesion, cohesion-----------------------------------------------------------------

-----surface tension

6) weld spatter means----------------------------------------------------------------------------------------------------------

defect

7) result of arc welding : composition of filler in electrode, inert gas liberation---------------------------------------------???

8) volatility of petrol is at temp : higher than diesel, lower than diesel-----------------------------------------------

-------lower than diesel

9) a perfect fluid is : compressible, viscous, all of the above-------------------------------------------------------------

----incompressible

10) sum prob related to apot welding-----------------------------------------------------------------------------------------

-????

11)father of industrial engg?---------------------------------------------------------------------------------------------------Fredrick Winslow Taylor

12) grant chart relates to?-----------------------------------------------------------------------------------------------------

???

13) continuous chips helps in : gud surface finish, easily disposable--------------------------------------------------------gud surface finish

14) 2 parallel shafts to be connected in perpendicular by: bevel, spiral , helical or worm gears---------------------------helical gear

15) a question on gear cutting-------------------------------------------------------------------------------------------------???

1)mercury does not wet glass, which fluid prop-COHESION,adhesion,ST,Visco------------------------------------------Surface tension (ST)

2)fluid has specific-SHAPE,vol,temp,pr.-----------------------------------------------------------------------------------Shape

3) petrols quality by-------------------------------------------------------------------------------------------------------

OCTANE NO

4)Thermal eff of 4str compared to 2 stroke is -----------------------------------------------------------------------greater (but lesser power than 2 stroke)

5) Durng suction stroke of diesel engine----------------------------------------------------------------------------------

FUEL AIR MIXTURE.

6) Fine mixture of fuel air in petrol engine is called----------------------------------------------------------------------CARBURRETION.

7)TIG welding requires-----------------------------------------------------------------------------------------------------ARGON N HELIUM.

8)Ideal Fluids follow--------------------------------------------------------------------------------------------------------

PASCALS LAW.

9Process havn ini n final states same--------------------------------------------------------------------------------------CYCLE.

10)Cyclic Process havn ini n final states same-----------------------------------------------------------------------------ZEROTH LAW.

11)DC series motor used in-SHAPERS,lathe,cranes,other-----------------------------------------------------------------

-cranes

12)Open cycle behavior over closed cylce----------------------------------------------------------------------open cycle

MORE STABLE BUT LESS ACCURATE.

13)Not a vector quantity- MI,force,accln,velo------------------------------------------------------------------------------MI (moment of inertia)

14) raindrops have spherical shape coz of-ST,visco.----------------------------------------------------------------------

surface tension

15)Steffan-Boltzman law----------------------------------------------------------------------------------------------------ABS

TEMP RAISE 2 FOUR.

16)KIRCHOFFS LAW OF HEAT TRANSFER------------------------------------------------------------------------------------

RATIO.

17)3 PHASE POWER SUPPLY,phases separated by--------------------------------------------------------------------------120 DEGREES.

18)Violating laws of thermo-------------------------------------------------------------------------------------------------

PMM.

19)CPM has-One time .----------------------------------------------------------------------------------------------------????

20) Not advtg of Motion study---------------------------------------------------------------------------------------------- Reducing Inventory costs.

21)Best weldable-.15%CS,.25%CS,// .5%CS,.75%CS---------------------------------------------------------------------????

22) Drawn into wires--------------------------------------------------------------------------------------------------------Ductility.

23)Carburising over Oxidising flame-Carbu-LESS,more effective---------------------------------------------------------More

24)Not renewable-NUCLEAR,solar,biomass,wind.--------------------------------------------------------------------------

nuclear

25)Dew pt of moist air------------------------------------------------------------------------------------------------------vapor condensation temperature

26) Density of water highest at-0C,100C,//0K,200C.---------------------------------------------------------------------

actually 4 degrees centigrade (277K)

27) Electrolyte-DISTILLED WATER,salt soln-------------------------------------------------------------------------------salt solution

28)PV=mRT applicable for-adiabatic,isothermal changes,BOTH,other----------------------------------------------------both

29)All modes of HT in-BOILER----------------------------------------------------------------------------------------------

,elec heater,steam cond.

30)Not a boiler classfn type------------------------------------------------------------------------------------------------Acc TO QUALITY OF WATER.

7.whats the measure of quality of petrol---(octane no,cetane no,etc)---------------------------------------------------octane

8.self ignition diesel engine as compared to petrol has?----(lower ignition temp,higher ignition temp,etc)-

-----------lower

9.the efficiency of compressor at high altitude---(increases,decreases,same,etc)---------------------------------

-----decreases

12.(not so sure) the velocity ratio of 8 teeth wheel and 100 teeth wheel in third gear wheel is(1:12.5,1:800,etc)-----1:12.5

31)Cam provides-OSCILLATING/ rotating/reci/other motion------------------------------------------------------------

?????

32) Brazing ----------------------------------------------------------------------------------------------------------------HARD

SOLDERING OF BRASS.

29)Acetylene filled in Cyl is in-LIQ/gas/solid/other state.--------------------------------------------------------------

Liquid (high pressurized)

17.if petrol is used in deisel engine-----(knocking increases,effeciency decreases,black smoke,will not work)-------knocking inc

25)In 4 stroke engine power str occurs for every------------------------------------------------------------------------ 2

REVLN OF CRANKSHAFT.

32.in 4-stroke engine,the cycle completes after how many revolutions of crank shaft---(2,4,1+1/2,2+1/2)------------2

4]carnot-cycleits effeciency and working basics-------------------------------------------------------------------------(refer above)

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SECTION-5

>>>>>>>>>>

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1)what is the use of dummy coils in induction motor?------------------------------------------------------------------------???

2)value of inductance depends on??-------------------------------------------------------------------------------------------switching frequency

3)number of devices connected together to store digital data is?------------------------------------------------------------register

a)circuit b)register c)varacter d)bits

4)the flow and timing of data to and from the micro processor is done by---------------------------------------------------control pin

a)control pin b)data pin c)address pin d)....

5)given transfer function 2/(s+2) and w=10 find gain------------------------------------------------------------------------0.196

a).44 b).33 c).196 d)...

6)induction instruments are widely used in----------------------------------------------------------------------------------

-???

a)voltmeter b)ammeter c)wattmeter d)frequency meter

8)kWh meter is-----------------------------------------------------------------------------------------------------------------recording type

a)recording type b)indicating type c)deflecting type d)..

9)synchronous motor is--------------------------------------------------------------------------------------------------------induction type

a)induction type b)cylindrical pole type c)salient pole type d)..

10)for dc shunt motor when polarities are reversed--------------------------------------------------------------------------reverses direction

a)it stops b)reverses direction c)it burns d)...

11) high pass filter acts as-----------------------------------------------------------------------------------------------------differentiator

a)integrator b)differentiator c)both d)none

12) when storage battery turns weak it is restored by--------------------------------------------------------------------

----distilled water

a)a dose of H2SO4 b)battery restorer c)distilled water d)none

13)when the battery of multimeter turns weak it shows-----------------------------------------------------------------

-----accurate reading

a)accurate reading b)lower reading c)more reading d)no reading

14) direction of induced emf in ind motor is given by------------------------------------------------------------------------right hand rule

a)flemmings L.H.R b) right hand rule c)thumb rule d)..

15)for balanced 3 ph Vyb lags Er by

a)120degree b)30degree c)60degree d)90degree

16)the B.W for transmission of n signals with freq Fm is-----------------------------------------------------------------

----2nFm

a)2Fm b)2nFm c)...d)...

17)schmitt trigger is-----------------------------------------------------------------------------------------------------------squaring circuit

a)squaring ckt b).....c)...d)...

18)capacitor is-----------------------------------------------------------------------------------------------------------------conductor filled with dielectric

a)insulator filled with dielectric b)conductor filled with dielectric c)...d)...

Key of sample paper from IAF EKT

here is the answer key for specialist .....ELECTRICAL,ELECTRONICS AND INSTRUMENTATION

1C 2A 3A 4B 5D 6 7 8B 9 10D

11B 12C 13C 14D 15B 16C 17C 18D 19D 20A

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SECTION-6

>>>>>>>>>>>>>>>>>>>>>>>>

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1.catalyst iz used for---------------------------------------------------------------------------------------------------------alters rate of reaction

(slow down the reaction rate, change in product part, inc the rate of reation)

2.electron spin is given by---------------------------------------------------------------------------------------------------

bohr

( plank, bohr)

3.max value of sin@+cos@---------------------------------------------------------------------------------------------------45 degrees

(at @= 30 deg., 45, 60, 90.)

4.something related to prism ref index were given one angle is given and other angle has to find----------------------n=sin[(A+D)/2]/sin(A/2)

n=refractive

index

A=refracting angle

D=Deviation angle

5.latch is same as ------------------------------------------------------------------------------------------------------------D-F/F

( RS F/F, JK F/F, d F/F .)

6.principle of hydrogen bomb-----------------------------------------------------------------------------------------------

uncontrolled nuclear fussion

( uncontrolled nuclear fission, controlled nuclear fission uncontrolled nuclesr fussion, uncontrolled nuclesr fussion.)

7.ques related to radioactive half life time---------------------------------------------------------------------------------

T=0.693/lambda

T=half life time

lambda=decay constant

8.property of radioactivity---------------------------------------------------------------------------------------------------gamma rays

(atomic nuclei, gamma rays, UV rays.)

9.carbon in million form becoz-----------------------------------------------------------------------------------------------catenation

(it is tetravalent, isomers, catenation..)

10.isotopes r------------------------------------------------------------------------------------------------------------------same

atomic no

( hav same atomic no. ,diff nuclei, diff no of protons)

11. 2 sides of triangle r 10cm ,8cm 3rd ? when d sides r in AP-------------------------------------------------------------either 6cm or 12cm

( 8cm,11cm)

12. 2882 arrangenet of electrons in an atom hav not true from options---------------------------------------------

------belongs to group 2

( dis atom belongs to group 2 ,..)

13. in potassium-------------------------------------------------------------------------------------------------------------4s>3d

( 4s>3p,4s>3d,4s

18. plane in air when turned in left wats happens to the nose and tail-----------------------------------------------

-----(actually tail of the airplane move toward the left, causing the nose turn to the right. ...)

(nose raise and tail dowm, nose down tail raise, both remain in same position.)

19. super conductor is-------------------------------------------------------------------------------------------------------dia-magnetic

( ferro mag. ,ferri mag., para mag., dia mag., anti mag..)

20. 3 vectors r given as z, z+iz,iz now in z axis----------------------------------------------------------------------------???

( a circle having 10 radius, ellipse, eccentric..)

21. probability of occurance of A and B is probability of not occurance of A and B is 1/ 6 wat is the

probability of A--P(A)P(B)+P(A)P(B')

(1/4)

22. non-atomic resistance is-----------------------------------------------------------------------------------------------

capacitor

( resistor, capasitor, diode.)

23. transistor most commonly biasing-------------------------------------------------------------------------------------

voltage divider

(emitter feedback, collector feed back, voltage divider, base bias.)

24. a transmitting signal havinf freq range 10.0mhz-10.1mhz hav sampling freq---------------------------------------200KHz

( 200khz, 100khz, .3mhz, .4 mhz)

25. in navy mari time communication is in--------------------------------------------------------------------------------

VLF

( VHF,VLF,LF,SHF..)

26. FSK is used in ----------------------------------------------------------------------------------------------------------telegraphy

( telegraphy,telephony,radiotransmission.)

27. video signal is in-------------------------------------------------------------------------------------------------------AM

( FM, AM, PCM.)

28. something related to cover on TV screen as base cover used 4----------------------------------------------------

-degaussing

( degaussing, reduction of UV rays, proper color, spotin of electron beam on screen)

29. colour in tv is due to---------------------------------------------------------------------------------------------------

chrominance

( chrominance,luminous, color burst..)

30. TWT is used in magnetron why----------------------------------------------------------------------------------------???

( gives high freq)

31. which one is digital signal---------------------------------------------------------------------------------------------PCM

( PSK, FM, AM,PCM..)

32. open loop sys compared to closed loop sys--------------------------------------------------------------------------unstable

( in stable less error,unstable )

33. efficiency of OPamp---------------------------------------------------------------------------------------------------

???(question not clear)

(1000000,10000,100,)

34. which one iz active filter----------------------------------------------------------------------------------------------RC

( RC, butterworth, notch)

35. what happens in ve feed back---------------------------------------------------------------------------------------gain

decrease,BW increases

circuit operation more stable

change in i/p and o/p impedances

36. which covers max area-----------------------------------------------------------------------------------------------circle wuth radius 4

( circle with radius 4,triangle with sides 3,4,4 , triangle with sides 3,4,5)

37. monochromatic beam in----------------------------------------------------------------------------------------------laser

( laser..)

38. RADAR is used for-----------------------------------------------------------------------------------------------------all

(defence survillence, detection of object, finds the vel of obj..)

39. component not in automatic control sys-----------------------------------------------------------------------------oscillator

(sensor,ascillator, error detector device..)

40. why v use tungsten wire in bulb-------------------------------------------------------------------------------------high resistance

( high resistance, high conductor, low resistance)

41. when power of transmitting signal is increased wat happens to its range?----------------------------------------increases (RADAR range equation)

42. microstrip is used in ?-----------------------------------------------------------------------------------------------planar microwave sensors built with

PCB technology

43. question related to dipole?------------------------------------------------------------------------------------------???

44. electron mobility in -------------------------------------------------------------------------------------------------

m(squared) per (volt-second)

(mm,cm,angstrom.)

45.in a molecule when oen atom is surrounded by four atom at corners the structure is-----------------------

-----tetravalent

(tetravalent, octavalent, .)

46. which is freq controlled system ------------------------------------------------------------------------------------PLL

(PLL,VCO..)

47. roots of an eq are twice of eq 3x^2+3x-3=0 the other eq is------------------------------------------------------

x^2+2x-4=0

48. addition of two vectors P and Q------------------------------------------------------------------------------------sqrt(P^2+Q^2+2PQcos@)

( p^2+q^2+2pqcos@..................)

49. mostly used transmission code------------------------------------------------------------------------------------ascii-7

(ascii-7,ascii-8,edbic)

50.when dc supply is removed to clipper then it is--------------------------------------------------------------------rectifier

(clampper,rectifier,demodulator,chopper..)

51.something like in in length in solenoid something dec wat happens to 3rd value?----------------------------

---???

52. A tap fills bucket in 15min B tap in 13 mins if both tap are open for 1 min starting with b tap in hoe much time the bucket fills

(14 ,13 , 14 )

53. question related to poly hedral------------------------------------------------------------------------------------???

54. evaporation in atm compared with water evaporation in vaccum------------------------------------------------

decreases

(inc,dec, remain same..)

55. P no of persons promise to give Q$ but R persons did not give the S$ each in charity wat is the eq for charity given

( dont remember the proper language)

56.red light wawlength can b detected by----------------------------------------------------------------------------

emmision spectrometer

( lumicent light, some instruments sort were given..)

1) The triangle z, z+iz and iz of area or the side is 50 then in which plane it lies-----------------------------------

circle

1)circle 2)ellipse

2) If the area is increased by 69% then how much the side of the square will increase----------------------------30 % (new area=1.69*side^2

=(1.3*side)*(1.3*side)=i.e. 30% increase in length of side)

1)13% 2)69% 3)130%

3) To suppress ____________ we use some FM modulation technic-------------------------------------------------

???

1)Carrier 2)USB 3)LSB

4) A central atom surrrounded by 4 pairs of electrons is called-----------------------------------------------------tetrahedral

1)tetrahedral 2)linear

5) The area formed by curve y=cos x if x or y is 0 and pi/4---------------------------------------------------------0.707 (integrate cos x bet'n 0 and pi/4)

6) If the atomic number increases in periodic table then------------------------------------------------------------

affinity increases

1)the size of atom increases 2)affinity increases

7) Isotopes means-----------------------------------------------------------------------------------------------------same at no,different at wt

8) At zero Kelvin the semiconduction in semiconductor is because of-----------------------------------------------???

9) To the physical balance when hot air is passed by a tube then---------------------------------------------------???

1)Physical balance will be in equilibrium

2)It will move according to weight of the pan

10) One problem in sequence number--------------------------------------------------------------------------------???

11) In Geometric Progression all are +ve nos, first consecutive two nos are same then common ratio will be----1

12) TWT question------------------------------------------------------------------------------------------------------???

13) Most commonly used metal in solar cells-------------------------------------------------------------------------Si

14) Current conducting non metal-------------------------------------------------------------------------------------

graphite

15) Which of the following doesn't give flame test--------------------------------------------------------------------

zinc

16) In audio amplifier reason for using R-C coupled------------------------------------------------------------------removes DC component

1)Input and output will be same frequency

17) Advantage of closed loop system over open loop system--------------------------------------------------------more stable and more accurate

1)Less stable and less accurate

2)more stable and less accurate

3)less stable and more accurate

18) Sound waves travel in air as---------------------------------------------------------------------------------------longitudinal

1)Longitudinal 2)Traverse 3)Latitudinal

19) In star network which of the following are true-------------------------------------------------------------------Line current=phase current

line voltage=1.732*phase voltage

1)formula reg line voltage 2)Line current formula

20) Tank circuit is------------------------------------------------------------------------------------------------------parallel LC circuit is tank circuit

1)Series circuit 2)Parallel Circuit

21) If the frequency is beyond resonant frequency then the impedance is------------------------------------------purely inductance

1)Purely capacitance 2)purely inductance

22) In physics from lenz law or faraday' law--------------------------------------------------------------------------no of

turns

1)no of turns 2)No of turns and distance between adjacent turns

23) The time period of the pendulum depends on---------------------------------------------------------------------length (as well as gravity)

24) Weight of the bob---------------------------------------------------------------------------------------------------???

3)dia of the bob

25) At 0 K semiconductor becomes-------------------------------------------------------------------------------------insulator

1)dielectric 2)insulator

26) Water is flowing in a pipe of dia given and spped also given when it is attached with another pipe of diameter given then what is the speed of the water in second pipe

--------------------------------------------------------------------------------------------------------------------------A1*V1=A2*V2

A=cross-section area of respective pipe

V=water speed at

respective pipe

27) Cal of linear strain if weight is given and length it elongates also given-----------------------------------------

Y=stress/strain=(Wt/A)/(l/L)

28) Angle of inclination of inclined manoeter--------------------------------------------------------------------------50-

75 degrees

29) Indirect way of generating FM-------------------------------------------------------------------------------------Armstrong modulation

1)Varactor diode modulation 2)Reactance FET 3)Armstrong modulation

30) If S=1 R=1 then Q value of SR FF would be------------------------------------------------------------------------

Forbidden

1)Set 2)Reset 3)Forbidden

31) Most ionic compound-----------------------------------------------------------------------------------------------LiF

1)LiC 2)LiF 3)LiBr

32) In which compound will the sulphur will have more than one oxidation state--------------------------------

---H2S2O7

33) Alkali metals are characterzed by--------------------------------------------------------------------------------

ionization

1)Solvency 2)Ionization

34) In the universe Carbon is in many compounds for the reason---------------------------------------------------catenation

1)Tetravalency 2)Isomerism

35) A polynomial given when divided by another polynomial given-------------------------------------------------remainder 0--Denominator is factor

non-zero--not a factor

36) Probablity of occurence of A is given neither A nor B also given and stated A and B are independent events.

Probability of occurence of B will be---------------------------------------------------------------------------------???

1)1/4 2)35482

37) Life cycle (Charge and discharge ) of Lead acid battery---------------------------------------------------------1200 cycles

1)1200 cycles 2)1000 cycles

38) logxto the base 8 +logxto the base 4+logxto the base 4=11 then value of x-----------------------------------64

1)8 2)64

39) In H2O2 oxygen is lost by oxidation or reduction then which bond of oxygen with hydrogen is lost-----------covalent

1)Covalent 2)Electro valent

40) Max value of sinA + cosAfor the value of A-----------------------------------------------------------------------45

1)30 degrees 2)45 degrees

41) Alkali metals occurs in cholorophyll------------------------------------------------------------------------------Ca (but even Mg is present but very low in composition)

1)Ba 2)Ca 3)Mg

42) Regarding series motor starting----------------------------------------------------------------------------------???

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43) In trajectile related question Range is given 100 m Initial velocity is 800 m/sec. find height of the object

-----R=u(squared)*sin2@/g --------------------->find the value of @ i.e angle of elevation and then use it in the following formulae

H=u(squared)*sin@(squared)/2g

the values in the question are improper..however the concept of solution is as discussed above

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44) Ball drops from height of 200 metres bounds back of 2/3 of its height

when it comes to rest what will be total distance travvelled-----------------------------------------------------------------1000 meters

45) No magnetic moment in---------------------------------------------------------------------------------------------------

Non-ferromagnetic

(actually dia-magnetic)

1)Ferro magnetic substances 2)Non ferro magnetic

46) Same input given to NAND gate then the operation is said to be---------------------------------------------------------NOT

1)NAND 2)NOT

47) Susceptability unit---------------------------------------------------------------------------------------------------------unitless

1)Wb-Am 2)WbAm-2

48) Why/What for strapping in magnetron------------------------------------------------------------------------------------to prevent mode jumping

49) Maximum attenuation for wave propagation is----------------------------------------------------------------------------dielectric

1)dielectric 2)conductor

50) In radio what beam is used by directional finder-------------------------------------------------------------------------pencil beam

1)Omni directional 2)Pencil beam

51) Peroxide effect-------------------------------------------------------------------------------------------------------------Free radical moment

52) At 25 degrees celcius Silicon barrier potentialis-------------------------------------------------------------------------0.7 volts (1.12 eV)

1)0.35 eV 2)0.3 eV

53) Two sine wave modulated by carrier wave of index 0.3 and 0.7 the combined index would be-------------------------0.76 to be precise

1)1 2)0.5 3)0.7

54) In opamp cross line detector will perform ------------------------------------------------------------------------------

-sine to square

1)sine to sine 2)sine to square 3)square to sine

55) Compound is used in or purpose------------------------------------------------------------------------------------------???

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