MECHANIC MOTOR VEHICLE

(THEORY)

SEMESTER – III

The clutch cover is bolted to ….

a. Fly wheel

b. Car frame

c. Engine block                                                                                                                                                                                                       d. Clutch disc                                                                                                                                                                                       Answer: a. Fly wheel

The following provides a smooth means of

disengagement and engagement between the
engine and the remainder of transmission system-

a. Clutch

b. Gearbox

c. Propeller shaft

d. Differential

Answer: a. Clutch

The torque which a clutch can transmit, depends upon the-

a. Coefficient of friction

b. Spring force

c. Contact surfaces

d. All of these

Answer: d. All of these

Mechanical transmission can be of following class(es) ….

a. Clutch, gearbox and live axle transmission

b. Clutch, gearbox and dead axle transmission

c. Clutch, gearbox and axle less transmission .

d. All of the above

Answer: d. All of the above

Which type of gear box is used in automobiles?

a. Sliding mesh gear box

b. Differential gear box

c. Synchromesh g

d. All of these

Answer: d. All of these

Four-wheel drive vehicles have differential at …..

a. Front wheels

b. Rear wheels

c. Both the front and rear wheels

d. Any of the front or rear wheels

Answer: c. Both the front and rear wheels

The differential unit consists …….

a. One bevel pinion

b. Two bevel pinion

c. Three bevel pinion

d. Four bevel pinion

Answer: b. Two bevel pinion

Which of the following is a higher pair?

a. Turning pair     

b. Screw pair

c. Belt and pulley

d. None of these

Answer: c. Belt and pulley

For a simple gear train, velocity ratio is the ratio of ……………

a. Speed of driving shaft and speed of driven shaft

b. Speed of driven shaft and speed of driving shaft

c. Speed of driven shaft and (speed of driving shaft + speed of idler gears)

d. Speed of driving shaft and (speed of driven shaft + speed of idler gears)

Answer: b. Speed of driven shaft and speed of driving shaft

In a simple gear train, if the number of idle gears is odd, then the motion of driven gear will-

a. Be same as that of driving gear

b. Be opposite as that of driving gear

c. Depend upon the number of teeth on the driving gear

d. None of the mentioned

Answer: a. Be same as that of driving gear

To connect two parallel and coplanar shafts the following type of gearing is used-

a. Spur gear

b. Bevel gear

c. Spiral gear

d. None of these

Answer: a. Spur gear

In which of the following type of gear train the first gear and the last gear are co-axial.

a. Simple gear train

b. Compound gear train

c. Reverted gear train

d. None of these

Answer: c. Reverted gear train

Transfer case is located next to the gearbox in …..

a. Front wheel drive

b. Rear wheel drive

c. Four wheel drive

d. All of these

Answer: c. Four wheel drive

Which of the following is not an example of recuperations' type heat exchanger?

a. Automobile radiators

b. Condensers

c. Chemical factories

d. Oil heaters for an aero

Answer: c. Chemical factories

In Disc clutch, the clutch disc acts as a ……

a. Driving member

b. Driven member

c. Neutral member

d. Any of these

Answer: b. Driven member

The following components forms valve operating mechanism except …..

a. Push rod .  .   

b. Rocker arm

c. Valve seat

d. Fork

Answer: d. Fork

Machine member used to connect engine shaft to gear box is cal led-

a. Differential

b. Clutch

c. Flywheel

d. Propeller shaft

Answer: b. Clutch

Which type of clutch does not require clutch pedal?

a. Single plate

b. .Multi plate

c. Centrifugal

d. Cone

Answer: c. Centrifugal

The valve is opened as the cam lobe on the cam raises the …..

a. Bearing

c. Valve lifter

b. Piston

d. Valve seat

Answer: c. Valve lifter

The size of the engine intake valve is ……………

a. Same as that of exhaust valve

b. Smaller than that of exhaust valve ,

c. Larger than that of exhaust valve

d. Does not depend upon the size of exhaust valve

Answer: b. Smaller than that of exhaust valve

The purpose of valve clearance is to ………..

a. Allow the valve to expand

b. Allow the sliding of valve in the guide

c. Ensure that the valve closes fully

d. Ensure that the crankshaft is free to rotate

Answer: c. Ensure that the valve closes fully

A relief valve is fitted to the main oil gallery of an engine.

The purpose of this valve is to-

a. Limit the maximum oil pressure

b. Open when the oil is hot

c. Maintain the supply if the gallery becomes blocked

d. Stop the oil flow to the bearings

Answer: a. Limit the maximum oil pressure

Which vehicle is generally provided with four wheel drive?

a. Ambassador car

b. Standard wagon

c. Matador

d. Jeep

Answer: d. Jeep

Leaf springs absorb shocks by ………..

a. Bending

b. Twisting

c. Compression

d. Tension

Answer: a. Bending

The following is (are) the independent suspension system(s) …..

a. Wishbone Arm system

b. Trailing Link system

c. Sliding Pillar system

d. All of these

Answer: d. All of these

The Ackermann steering iayout ……..

a. Makes for safer driving

b. Enables the driver to feel ahead position

c. Reduces load on the kingpins and stub axles

d. None of the above

Answer: a. Makes for safer driving

In disc brake, the disc is attached to the ………

a. Wheel

b. Axle

c. Suspension system

d. None of these

Answer: b. Axle

The function of master cylinder in hydraulic brakes is to ……….

a. Builds up hydraulic pressure to operate the brakes

b. Maintains constant volume of fluid in the system

c. Serves as a pump to force air out of the hydraulic system

d. All of the above

Answer: d. All of the above

The following factor(s) contribute to the effectiveness of the brakes ………..

a. Area of brake linings

b. Radius of car wheel

c. Amount of pressure applied to shoe brakes

d. All of the above

Answer: d. All of the above

The process of removing air from the brake system is known as …..

a. Bleeding

b. Self-energizing .  

c. Servo action

d. Energization

Answer: a. Bleeding

When brakes are applied on a moving vehicle;

the kinetic energy is converted to ……..

a. Mechanical energy

b. Heat energy

c. Electrical energy

d. Potential energy

Answer: b. Heat energy

The force required to stop a vehicle is dependent on ……

a. The weight of vehicle

b. The deceleration rate

c. Both a and b

d. None of these

Answer: c. Both a and b

Coil springs absorb shocks by……….

a. Bending

b. Twisting

c. Compression

d. Tension

Answer: c. Compression

The following is a type of leaf springs ……….

a. Three Quarter elliptic

b. Semi elliptic

c. Quarter elliptic

d. All of these

Answer: d. All of these

The material used for making torsion bar is ………

a. Steel

b. Cast iron

c. High carbon steel

d. All of these

Answer: a. Steel

Spring shackles are used to join ……….

a. Chassis frame and spring

c. Chassis frame and axle

b. Spring and Axle

d. All of these

Answer: a. Chassis frame and spring

Cam actuated double acting hydraulic shock absorber contains ……..

a. No piston

b. Single piston

c. Double pistons

d. Three pistons

Answer: c. Double pistons

The main reasons for crankshaft wear are ………….

a. Different loads at some points of rotation

b. Centrifugal forces due to crankshaft rotation

c. Misalignment in connecting rod

d. All of the mentioned

Answer: d. All of the mentioned

The main causes of crankshaft vibration are ………

a. Variation in torque

b. Cyclic variation of gas and combustion products
c .Unbalanced weight of parts

d. All of the mentioned

Answer: . d. All of the mentioned

In the cam, the distance between the base circle and the nose is called ……..

a. Lift

b. Lobe

c. Flank

d. Pitch

Answer: a. Lift

The function of anti-lock brake system (ABS) is that is ………….

a. Reduces the stopping distance .

b. Minimizes the brake fade

c. Maintains directional control during braking by preventing the wheels from locking

d. Prevents nose dives during braking and thereby postpones locking of the wheels

Answer: c

In a four wheel drive (4 WD), the numbers of gear boxes are ……………

a. 1

b. 2

c. 3

d. 4

Answer: b. 2

In the steering gear, a gear sector or toothed roller is meshed with a …….

a. Ball bearing

b. Roller bearing

c. Worm

d. Steering wheel

Answer: c. Worm

The only service that a steering linkage normally requires is ……….

a. Tie-rod adjustment

b. Lubrication

c. Ball-joint replacement

d. None of the mentioned

Answer: a. Tie-rod adjustment

Too much toe-in will be noticed by ……….

a. Excessive tyre wear because of taking

b. Steering wander

c. Feathering of tyres

d. Light steering

Answer: a. Excessive tyre wear because of taking

The most widely used-brakes are operated ………

a. Electrically

b. Hydraulically

c. By air pressure

d. By vaccum

Answer: b. Hydraulically

Of  the four tyres on a car, the one that wears most is ……

a. Right front tyre

b. Right rear tyre

c. Left front tyre

d. Left rear tyre

Answer: b. Right rear tyre

Weight can be attached to wheel rim to correct ……..

a. Wheel alignment

b. Wheel balance

c. Wheel run out

d. All of these

Answer: b. Wheel balance

Steering gear …….

a. Rack and pinion type

b. Worm and roller type

c. Recirculating ball type

d. Any of  these

Answer: d. Any of  these

Wheel base of a vehicle is the ……

a. Distance between front and rear axles

c. Extreme length of the vehicle

b. Distance between the front tyres

d. Width of tyres

Answer: a. Distance between front and rear axles