gk auto 6 converted

7/29/2019 Gk Auto 6 Converted

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Series

ok Code: gk-auto-6

roduction

is book is for the convenience of members of www.gkguru.com for referring Automobile Engineerestions and Answers off-line. This is Volume 6 in this section. Total number of questions includ

re are 50 Nos.

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a differential with a gear ratio of 4 : 1 the drive pinion would revolve four times to cause the ring

rotate

1 time

2 times

4 times

6 times


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ore often, the condition that draws attention to trouble in the differential is (a) Rough operation

Noise

Power loss

correct heavy toe contact on ring gear teeth, move the (a) Ring gear towards pinion

Ring gear away from pinion

Drive pinion out and back lash

a straight road, the ring gear

Rotates at the same speed as wheels

Rotates faster than wheels

Rotates slower than wheels

Does not rotate

a passenger car a typical arrangement of braking with drum brakes will be (a) Two leading shoes

nt and leading & trailing at rear (b) All the wheels having leading and trailing shoes

All the wheels having two leading shoes

Front leading and trailing, rear two leading shoes

ake efficiency is a term which denotes

Efficiency of the braking system as a whole

Efficiency of the braking linings


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The deceleration as percentage of gravity

Efficiency of the operating linkage

e most widely used brakes are operated

Electrically

Hydraulically

By air pressure

By vacuum

a rule when comparing the front and rear wheel cylinder pistons it will be found that the pistons in

nt wheel cylinders are

The same size

Smaller in diameter

Larger in diameter

e type of braking system referred to as power brake, makes use of (a) Electromagnets

Compressed air

Vacuum

the vacuum suspended system, the brakes are applied when (a) Atmospheric pressure is applied to

e of the diaphragm (b) Vacuum is applied to both sides of diaphragm

Atmospheric pressure is applied to both sides of the diaphragm


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0

the atmospheric suspended system the brakes are applied when (a) Vacuum is applied to both side

diaphragm

Atmospheric pressure is applied to both sides of the diaphragm (c) Atmospheric pressure is appl

one side of the diaphragm

1

a vacuum suspended unit, when the brakes are on, the piston or diaphragm has on both sides of it

Atmospheric pressure

Vacuum

Hydraulic pressure

2

e function of the relay valve in a compressed air brake system is to (a) Limit the maximum pressur

ched in brake chambers (b) Relieve air pressure in brake chambers when it reaches a maximum v

Reduce the effort required at the brake pedal

Speed up the supply of air to brake chambers located at a distance from brake valve

3

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the hydraulic braking system, the piston in the master cylinder is connected by mechanical linkage

Wheel cylinders

Brake shoes

Brake pedal

Wheel pedal

4


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the hydraulic braking system, the movement of the pistons in the wheel cylinder is transmitted to th

ke shoes by

Actuating pins

Springs

Cables

Trunnion

Joints

5

wo general types of vacuum assisted power brakes are (a) Vacuum suspended and power suspende

Integral and pressure suspended

Atmospheric suspended and vacuum suspended

6

the integral type of power brake, the diaphragm acts directly on the hydraulic piston in the

Master cylinder

Wheel cylinder

Multiplier unit

7

the multiplier type of brake, the diaphragm acts directly on the hydraulic piston in the

Master cylinder

Wheel cylinder

Multiplier unit

8


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the power assisted type of brake the bellows applies force to the master cylinder piston

Through diaphragm linkage

Directly

Through mechanical linkage

9

the air brake, air pressure is supplied by

Engine manifold

A compressor

The diaphragm valve

0

wer brakes in general operate making use of the pressure differential between the vacuum from the

ake manifold and

Compressed air

Atmospheric pressure

Venturi vacuum

1

the multiplier power brake system, movement of the brake pedal (a) Increases the hydraulic pressu

ich actuates the control valve (b) Actuates the valve in the bellows through linkage (c) Actuates th

ve to admit atmospheric pressure to one side of the diaphragm

2

the power assisted brake system, movement of the brake pedal (a) Increases the hydraulic pressure

ich actuates the control valve (b) Actuates the valve in the bellows through linkage (c) Actuates thve to admit atmospheric pressure to one side of the diaphragm


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3

e metal used for the brake drum is

Aluminium alloy

Cast steel

Pressed steel

Cast iron

4

eeding of brakes means

Filling the master cylinder with brake oil

Adjusting the brake shoe

Removing air between master cylinder and each wheel unit

5

trucks the system of wheel braking employed is

Mechanical

Hydraulic

Pneumatic

6

eeps we use

Mechanical brakes

Hydraulic brakes

Air brakes


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7

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a vacuum type servo-assisted brake system, vacuum is available in ........ is made use of

Exhaust manifold

Combustion chamber

Water jackets

Inlet manifold

8

e approximate ratio of effort applied : effort available from servo system is (a) 1:1

3:1

1:4

10:1

9

e to continuous running on a hot day the temperature of the braking fluid will increase, hence some

king torque is applied on brake shoes, to avoid this a small quantity of fluid will be allowed to es

o the master cylinder through (a) Intake port

Exhaust port

Secondary port

0

the load on the vehicle increase it demands

Increased braking torque

Decreased braking torque


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Same braking torque

1

the hydraulic brake system, the movement of a piston in the master cylinder produces hydraulic

ssure which causes movement of

Brake shoe

Brake pedal

Brake cam

2

the case of brake linings saturants and bonding materials are used to (a) Facilitate moulding and cubrake linings

To improve the heat dissipating capacity of linings (c) To give a constant coefficient of friction u

0 C

To make the lining material impervious to moisture and oil and to ensure a steady coefficient of

ction up to 3000 C

3

ake lining area required for shoe brakes for trucks is mainly based on (a) Average truck speed

Frequency of brake applications

Gross vehicle weight

Material used for brake drums

4

e working fluid normally used in hydraulic brake systems is (a) High speed diesel oil along with

ohol

SAE 20 oil with anti-corrosion additives

A mixture of vegetable oil and SAE 10 oil


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A solution of castor oil in alcohol along with neutralizer

5

ovement of the brake pedal forces brake fluid from the master brake cylinder through brake lines a

o the

Brake shoes

Wheel cylinders

Brakes cables

Pedal rod

6

ring braking the brake shoe is moved outward to press against the (a) Wheel piston or cylinder

Brake lining

Brake drum or disc

Wheel rim or axle

7

the hydraulic brake system, movement of a piston in the master cylinder produces hydraulic pressu

ich causes movement of the (a) Wheel cylinder pistons

Brake pedal

Brake cam

8

e radius of a pneumatic tyre is

The radius of unloaded fully inflated tyre

The height of centre of tyre from the ground when it is loaded (c) Imaginary radius found by measdistance per revolution of the loaded tyre


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It is fixed radius, based on the dimensions of the tyre

9

r a through inspection a tyre should be

On the car

On the wheel

Off the wheel

Inflated

0

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a tube of large size than required is installed in a tyre then (a) The tyre will over expand

The tyre and tube will not fit the rim

The tube will overlap and wear

1

the four tyres on a car, the one that wears most is the (a) Right front tyre

Right rear tyre

Left front tyre

Left rear tyre

2

equalize tyre wear, it is suggested that tyres be rotated from one wheel to another every

80 kms

8000 kms


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800 kms

3

e distance between dual tyres of vehicles is to be correctly spaced to (a) Ensure proper distributio

d between dual wheels (b) Reduce over-steering effect

Reduce the slippage between tyre and road while taking a turn (d) Ensure effective braking

4

hen an automobile takes a tum to avoid the skidding and over turning (a) Each wheel will roll

ependently

Front two wheels will have a common centre during a turning (c) All the 4 wheels will roll on ar

ving a common centre

5

heels must be balanced

On the car only

Either on or off the car

Off the car only

6

eight can be attached to wheel rim to correct

Wheel alignment

Wheel run out

Wheel balance

7

e out on turns


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Is adjusted by shims

Is adjusted by changing the effective length of the tie rods (c) Cannot be adjusted

8

ster is defined as the inclination of

Front wheel to the vertical

The king pin axis in the fore and aft plane

The king pin axis in the transverse vertical plane (d) The axis of stub axle to the horizontal

9

e Ackermann steering layout

Makes for safer driving

Enables the driver to feel ahead position

Gives minimum tyre wear

Reduces load on the kingpins and stub axle

0

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epare today for a better tomorrow......

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gk auto 6 converted

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