SANKAR POLYTECHNIC COLLEGE (AUTONOMOUS), SANKAR NAGAR -627357

DEPARTMENT OF COMPUTER ENGINEERING

EXAM FROM HOME

< --- Attention for the Computer Engineering Students! --- >

Dear Students,

Greetings.

This is informed you all that the department wants to give some practice and training for subjects of current semester. Hope this will be very useful for your upcoming semester examinations and make your lockdown periods will be very effective.

Regarding this, the every student must follow the following instructions without fail.

1. Herewith we have attached all the subject question papers (Mid Semester Examination), So the students should study the answers and will written test yourself in your resident.

2. Test must be in the hand written mode (Plain Paper or Note book).

3. Once the test is complete then you should take a snapshot through mobile and make it in the format of pdf.

4. Then the pdf will send to the mail:spc1yrcse@gmail.com. Last date is: 30.04.2020.

5. in the answer paper, mention your Subject of the examination, reg-no and name and also do the same on the subject of the email (Example: Computer hardware and servicing, 162139, M.RAMESH,).

6. Your answer papers will be evaluated by our staff members, if any one failed to submit your paper then you will not be allowed for the semester examinations.

7. After the submission of papers then the same procedure will be processed for model examinations question papers too.

Note: We expect your full honesty of writing the examination, Avoid copying and mal practice activities Submit all the examination’s answer papers without fail. This is initiated approach for refreshing the subject topics and the preparation of forthcoming semester examinations. Hence all the students should cooperate and make your holiday very effective manner.

For Further clarification, contact the department HOD/COMP.!

Thank you.

Sankar polytechnic college, Sankar nagar.

Communication English – II Mid Semester Examination

Time: 3 hours Marks: 100 Part- A (12x5=60 MARKS)

I. Answer all the following. 1. Fill in the blanks with suitable helping verbs – have, has, had:

1. We …… no interest in this proposal. 2. Mark …… not got a girlfriend. 3. You should …… been more careful. 4. It …… been raining since yesterday. 5. She …… gone to the college just now.

2. Change the following sentences into negative:

1. They are going on a holiday. 2. She is writing a letter. 3. He has submitted the assignment. 4. I have done my homework. 5. We had done a nice play.

3. Rewrite the following sentences adding question tag:

1. They can never lift the heavy box. 2. The police punished the thief. 3. He buys a new laptop for his own. 4. They are going to visit Newlands. 5. Michael is not an artist paints new.

4. Identify the Main clause and Subordinate clause in the following sentences.

1. We first met in London, where I lived until I was nine. 2. The car, which we bought last week, has broken down. 3. Even though it was midnight, the children were still awake. 4. If I win the game, we can celebrate with a party. 5. The helicopter landed because it was too windy to fly.

5. Rearrange the letters of the following in the correct order to make a word:

1. kowr, 2. xema, 3. dogo, 4. doof, 5. lalf,

6. Match the following words so that you can make suitable collocation: a. Active - a seat b. Break - quiet c. Make - participation d. Take - noise e. Keep - a record 7. Fill in the blanks with suitable verbs in agreement with the subject:

1. Either Ramu or his friends …… (has / have) the book. 2. The dog along with its master …… (is / are) going for a walk. 3. The police …… ( is / are) forced to act. 4. The poet and the philanthropist …… (is / are) coming for the function. 5. Slow and steady …… (wins / win) the race.

8. Rewrite the following sentences converting the infinitive into gerund and vice versa: 1. Jim stopped to tie his shoelace. 2. The teacher expected Sarah studying hard. 3. She avoided telling him about her plan. 4. I learned riding the bike at the age of 5. 5. She helped me carrying my suitcase.

9. Rearrange the jumbled sentences into a coherent order:

1. He felt very difficult to talk with the taxi-driver as he did not know Hindi. 2. An old man came to Bombay for the first time. 3. So the old man got frightened and came out of the station. 4. His son did not come to the station to receive him. 5. He called a taxi driver to seek help. 10. Write an email to the Superintendent of Police, inviting him as Chief Guest to your college day function. 11. Give a list of four instructions to be followed before firing crackers.

12. Make 10 words by combining the letters in the hexagon. The central letter should be common in each word.

PART – B (4x10=40 MARKS)

1. Write a letter to your friend thanking him for his timely help of giving money for paying your Tuition Fee.

2. Write the critical appreciation of the poem Ozymandias by P.B Shelley 3. What is the message conveyed through the poem “Stopping by Woods on a Snowy Evening” by Robert Frost.

4. Answer the following questions in one or two sentences: (5X2=10) 1. Who wrote the short story “an Astrologer’s day”? 2. Who were the traders doing business in Town Hall Park? 3. What happened when the Astrologer got ready to go home? 4. What was the fact told by the Astrologer to the stranger? 5. What happened actually between the Astrologer and Guru Nayak during their younger days?

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SANKAR POLYTECHNIC COLLEGE, SANKAR NAGAR.

MID SEMESTER

C.T

ENGINEERING MATHEMATICS MAX.MARKS:100

PART-A

ANSWER ANY 20 QUESTIONS 20*2=40

1. State the formula to find work done by the force 𝐹 in displacing the particle from the point A to B.

2. If 𝐹 = 𝑖 -𝑗 -3𝑘 and 𝑟 =2𝑖 -2𝑗 -3𝑘 Find torque

3. Find the value of 𝑖 + 𝑗 , 𝑗 + 𝑘 , 𝑘 + 𝑖

4. Find the scalar triple product of 𝑖 -2𝑗 +3𝑘 , 2𝑖 +𝑗 -𝑘 , 𝑗 +𝑘

5. Prove that the vectors 2𝑖 -𝑗 +2𝑘 , 5𝑖 +2𝑗 +3𝑘 , 4𝑖 -2𝑗 +4𝑘 are coplanar

6. Express (𝑎 𝑋𝑏 ) . (𝑐 𝑋𝑑 ) in the form of determinant

7. Define discrete random variable.

8. A random variable X has the following probability distribution

𝑋 = 𝑥 1 2 3 4 P(X=x) 2k 3k 5k 7k

Find the value of ‘k’

9. If E(X)=2, E(X2) =8 Find variance of X.

10. A random variable X has the following probability distribution

X=x 0 1 2 3

P(X=x) 1/7 2/7 1/7 3/7

Find the mean.

11. State the Normal Equation to fit a straight line y=ax+b.

12. The distance time formula is given by s=2t3-5t

2+7t-4 Find the velocity after t=2ses

13. The distance ‘s’ described by a particle in time ‘t’ second is given by s=aet +be

-t. Show that the acceleration is equal

to the distance.

14. Find the slope of the normal to the curve y2 = 4ax at (at

2,2at)

15. At what point does the curve xy=x-4 cuts the x-axis.

16. Find maxima or minima for y=x2 -4x

17. State the condition for the curve y = f(x) at x = a to be maximum.

18. Find the order and degree 0846

2

2

2

3

3

dx

dy

dx

yd

dx

yd

19. Solve x dx + y dy=0

20. Solve 0122

2

ydx

dy

dx

yd.

21 Solve 0442

2

ydx

dy

dx

yd.

22. Find the complementary function of (D2+1) y = e

2x

23. Find the particular integral of (D2+5D+6) y = 12

24. Find the particular integralof (D2-6D+9) y=e

3x

25. Find the particular integralof (D2+6D+8) y = e

-2x

PART B

26 (a) A particle acted on by the forces 5𝑖 -𝑗 +𝑘 , 𝑖 +5𝑗 -2𝑘 is displaced from the point 𝑖 + 𝑗 +𝑘 to the point

2𝑖 +3𝑗 +2𝑘 . Find the total work done.

(b) Prove that the points given by the vectors 4𝑖 +5𝑗 +𝑘 , -𝑗 -𝑘 , 3𝑖 +9𝑗 +4𝑘 and −4𝑖 +4𝑗 +4𝑘 are coplanar

(c) If 𝑎 = 2𝑖 +3𝑗 +𝑘 , 𝑏 =𝑖 -2𝑗 +3𝑘 , 𝑐 = 3𝑖 +2𝑗 − 5𝑘 . Verify the 𝑎 X (𝑏 𝑋𝑐 ) =( 𝑎 . 𝑐 ) 𝑏 - (𝑎 .𝑏 )𝑐

27 (a) Prove that 𝑎 + 𝑏 , 𝑏 + 𝑐 , 𝑐 + 𝑎 = 2 𝑎 , 𝑏 , 𝑐 (b) A random variable X has the following probability distribution

X=x 0 1 2 3 4 5 6 7 8

P(X=x) A 3a 5a 7a 9a 11a 13a 15a 17a

Find (i) )3( XP (ii) )3( XP (iii) P(0<X<5)

(c) Let X be a random variable with following probability distribution

X=x -1 0 1 2

P(X=x) 1/3 1/6 1/6 1/3

Find (i)E(X) (ii) Var (X) (iii)E(2X+3)2

28 (a) Fit a straight line to the following data.

X 2 3 5 8 10

Y 5 6 10 18 21

(b) The distance ‘s’ meters travelled by a body in ‘t’ secs. Is given by s=t3-6t

2+12t+8.

Find its velocity when the acceleration is zero and calculate the acceleration when the velocity zero?

(c). Find the equations to the tangents to the curve y=x2+x-6 at the points where the curve cuts the x-axis,

29 (a). Find the equations of the tangent and Normal to the curve Y=6+x-x2 at (2, 4).

(b). Find the maximum and minimum values of (x-1)2(x-2).

(c) . Solve 0tansec1 2 ydxeydye xx

30. (a). Solve (D2+D+1) y = 0

(b). Solve (D2-7D+12) y = 0 Given y = 0, Dy = 1 when x = 0

(c). Solve (D2+6D+8) y =e

-2x

SANKAR POLYTECHNIC COLLEGE (AUTONOMOUS), SANKAR NAGAR-627 357

N – SCHEME (ENGINEERING PHYSICS – II)

SEM –IIMID SEMESTER QUESTION PAPER- CT

Time: 3Hrs Marks : 100

PART – A

Note: Answer any TWENTY questions, All questions carry equal marks.20 x 2 =40

1. What is meant by temperature?.

2. What is meant by radiation?

3. Write any two properties of thermal radiation?

4. Define mean free path of a molecule.

5. Define root mean square velocity of molecule.

6. Define specific heat capacity of a gas at constant pressure

7. Give the relation between pressure and kinetic energy of a gas.

8. Define ratio of specific heat capacities of gases.

9. State first law of thermodynamics.

10. Define isothermal change.

11. State Kelvin statement of second law of thermodynamics.

12. Define critical pressure

13.State Joule-Thomson effect.

14. What is temperature of inversion?

15. What is meant by renewable sources of energy?

16. Write any two advantages of renewable sources of energy.

17.State Ohm’s Law.

18. Define Resistivity (or) Specific Resistance.

19.Define Meissner effect.

20. State Kirchoff’s Laws.

21. State Joule’s law of heating.

22. State Faraday’s laws of electrolysis.

23. Define ece of an element.

24. Define Capacitance of a Capacitor.

25. State Fleming’s left hand rule.

PART – B Note:1) Answer all questions, choosing any two sub-divisions from each question.5X2X 6=60 2)All questions carry equal marks. I a) List the Properties of Thermal Radiation.

b) List the postulates of kinetic theory of gases.

c)Calculate the value of R from the gas equation PV=RT.

IIa)Derive the expression for the pressure of a gas on the basis of kinetic theory of gases.

b)Derive Mayer’s relation (Cp-Cv=R) between two specific heats Cp and C v of a perfect gas.

c) Air at 5 atmospheres is suddenly compressed to half of its volume. Find the resulting pressure of the air

(γ=1.4)

III a)Explain isothermal & adiabatic change

b) Describe the Linde’s process for the Liquefaction of air.

c)Write a note on Wind energy

IV a) Write a note on biomass energy

b)Derive the condition for balancing the Wheatstone’s Bridge.

c) The resistance of a wire of length 25m and 0.9mm diameter is 0.8 Ω.Calculate the resistivity of the

wire.

Va) Derive an expression for effective Capacitance when Capacitors are connected in series and parallel

b) Describe an experiment to determine the specific heat capacity of a liquid using Joule’s calorimeter

c) Describe an experiment to determine the ece of copper using copper voltameter.

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SANKAR POLYTECHNIC COLLEGE SANKAR NAGAR

MID SEMESTER EXAMINATION – FEB 2020

ENGINEERING CHEMISTRY – II

TIME : 3Hrs MARKS : 100

DEPT: Computer

PART – A

Answer any TWENTY questions 20 x 2 = 40

1. Define pollution. 2. What is acid rain? 3. What is green house effect? 4. What is water pollution? 5. Define sewage and sewerage. 6. What are effluents? 7. What is solid waste management? 8. Define green chemistry. 9. What is recycling? 10.What is fuel? Give an example.

11.Define calorific value of a fuel.

12.Define fractional distillation.

13.What is cracking?

14.Write the composition and uses of LPG.

15.Define combustion.

16.What is flue gas?

17.What are rocket propellants?

18.What are plastics? Give examples.

19.Define polymerization.

20.Define vulcanization.

21.What are the abrasives? Give example.

22.What is Moh’s scale?

23.Define composite materials.

24.What are refractories? Give example.

25.Give the uses of silica bricks.

PART – B

Answer any TWO sub divisions from each questions below: 5 x 2 x 6 = 60

26. A. List the harmful effects of global warming.

B. Write the harmful effects of any three heavy metal ions.

C. What are the problems of eutrophication?

27. A. Explain the methods of disposal of solid wastes.

B. Write the goals of green chemistry.

C. Explain the fractional distillation of petroleum. Give their uses. 28. A. Write the advantages of gaseous fuels. B. Describe the flue gas analysis by Orsat apparatus. C. A gaseous fuel has the following composition by volume: CH4=8%, H2=20%, C=30%, CO2=7% and the remaining is nitrogen. Calculate the volume of air required for the complete combustion of 1m3 of the gas. 29. A. Compare solid and liquid propellant. B. Distinguish between thermoplastics and thermosetting plastics.

C. What are the components added during compounding of

rubber? Mention their functions.

30. A.Mention the mechanical properties of plastics.

B. Write the manufacture, property and uses of Silicon carbide

(Carborundum) .

C. What are the requirements of a good refractory?

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SANKAR POLYTECHNIC COLLEGE (AUTONOMOUS), SANKAR NAGAR – 627 357 MID SEMESTER EXAMINATION-FEB’2020

N2205-DIGITAL ELECTRONICS AND COMPUTER FUNDAMENTALS TIME: 3Hrs PART-A MAX MARKS: 100

Answer all questions by choosing either (a) or (b): 5 x 10 = 50 1. a. Convert the following

i)(427)10 Decimal to hexa decimal ii)(11101100101001)2 Binary to hexa decimal iii)(143)8 Octal to hexa decimal iv)(B5A)16 Hexa decimal to octal

(Or) b. State and prove demorgan’s thorem

2. a. Simplify the expression using k-map F(A,B,C,D)=£(0,2,5,7,8,10,13,15)

(Or) b. Explain how to implementation of all other basic gates by using NAND gates?

3. a. Explain the working of half adder and full adder with logic diagram and truth table (Or)

b. Explain the working of half subtractor and full subtractor with logic diagram and truth table

4. a. Explain the 1 bit magnitude comparator with logic diagram and truthtable (Or)

b. Explain the working of 1:4 demultiplexer with logic circuit and truth table

5. a. Explain RS flip flop with truth table and logic diagram? (Or)

b. Explain JK Master Slave flip-flop with truth table and logic diagram?

PART-B

Answer any nine questions of the following: 9 x 5 = 45 6. What is decimal number system? Give example 7. Explain about the gray code? 8. What is i)1’s complement with examples ii)2’s complement with examples 9. Write any five laws of Boolean algebra? 10. Simplify the following Boolean expression=ABC+A’B+ABC’ 11. Write the truth table and logic symbol of OR and AND gates 12. Write the truth table and logic symbol of NAND and NOR gates 13. Write the truth table and logic symbol of XOR and XNOR gates 14. Realization of Boolean expression using logic gates F=ABC+ABC’+A’BC’ 15. Realization of Boolean expression using logic gates F=(A+B+C).(A+B’+C).(A+B’+C) 16. Definition of encoder and decoder with examples? 17. What is multiplexer and demultiplexer? 18. List the application of flip-flop? 19. What is sequential and combinational logic circuit? PART-C

Compulsory Question: 1 x 5 = 5 20. Compare sequential and combinational circuits