Home
Current Affairs January 2024

What is the correct answer?

4

It is necessary to maintain the valve clearances as they

A. Reduce the resistance to sliding that occurs between the cam and the tappet

B. Allow for lengthening of the valves owing to the heat of combustion

C. Increase the speed at which the valves move up and down

D. Make the crankshaft turn smoothly

Correct Answer :

B. Allow for lengthening of the valves owing to the heat of combustion


Related Questions

What is the correct answer?

4

The cetane rating of Diesel fuel is in the order of

A. 25

B. 45

C. 70

D. 90

What is the correct answer?

4

The auto ignition in a spark ignition engine means

A. Automatic ignition of the charge at the end of compression

B. Ignition induced by the passage of a spark

C. Ignition of the charge before the passage of flame front

D. Ignition induced to supplement the process of normal combustion

What is the correct answer?

4

The mechanical efficiency (ηm) of an I.C. engine is equal to (where I.P. = Indicated power, B.P. = Brake power and F.P. = Frictional power)

A. I.P/B.P.

B. B.P/I.P.

C. B.P/F.P.

D. F.P/B.P.

What is the correct answer?

4

The most commonly used power plant in automobiles is

A. Gas turbine

B. I.C. engine

C. Battery

D. None of these

What is the correct answer?

4

In case of a Diesel car, the pressure at the end of compression is of the order of

A. 15 bar

B. 25 bar

C. 35 bar

D. 45 bar

What is the correct answer?

4

Wheel base of a vehicle is the

A. Distance between the centres of the front and rear wheels

B. Distance between the centres of the front tyres

C. Distance between the centres of the rear tyres

D. Extreme length of the vehicle

What is the correct answer?

4

The ball joints are used on the tie rod ends, because they

A. Reduce the amount of noise generated

B. Reduce the amount of sliding resistance

C. Can deal with movement of the suspension both vertically and in other directions

D. Improve the force transmission speed

What is the correct answer?

4

The material generally used for cylinder sleeves is

A. Aluminium

B. Ceramic

C. Cast iron

D. Fibre reinforced plastic

What is the correct answer?

4

The basic purpose of tyres is to

A. Grip the road and provide good traction

B. Substitute for springs

C. Act as brake

D. None of these

What is the correct answer?

4

The battery is an electrochemical device, which means battery

A. Makes chemicals by mechanical means

B. Uses chemical action to provide electricity

C. Has curved plates instead of flat plates

D. Does not use an electrolyte

What is the correct answer?

4

The negative plates of a lead acid battery has

A. Lead peroxide (PbO₂)

B. Spongy lead (Pb)

C. Lead sulphate (PbSO₄)

D. Sulphuric acid (H₂SO₄)

What is the correct answer?

4

When turning a corner

A. The front wheels are toeing out

B. The front wheels are turning on different angles

C. The inside front wheels has a greater angle than the outside wheel

D. All of the above

What is the correct answer?

4

In a four stroke engine for each crankshaft revolution, the camshaft revolves

A. One half turn

B. One turn

C. Two turns

D. Four turns

What is the correct answer?

4

The specific gravity of acid in a fully charged battery is generally

A. 1.00

B. 1.28

C. 1.82

D. 2.81

What is the correct answer?

4

The device for smoothening out the power impulses from the engine is called

A. Clutch

B. Differential

C. Flywheel

D. Torque converter

What is the correct answer?

4

The main cause for the change in engine oil viscosity is

A. Humidity

B. Temperature

C. Vibration

D. Contamination

What is the correct answer?

4

The basic purpose of a four wheel drive (4WD) system is that it

A. Delivers improved cornering on dry road surfaces

B. Eliminates the need of snow tyres, tyre chains, etc.

C. Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces

D. Ensures that effective braking can be performed, even on slippery surfaces

What is the correct answer?

4

The effect of vapour locking on the brake performance is that the

A. Brakes function more effectively

B. Brakes fail completely

C. Brake operation is delayed after depression of the brake pedal

D. Vapour locking has no effect on brake performance

What is the correct answer?

4

In a four speed four stroke Diesel engine, the intake valve

A. Opens at T.D.C. and closes at B.D.C.

B. Opens at 20° before T.D.C. and closes at 35° after B.D.C.

C. Opens at 10° after T.D.C. and closes at 20° before B.D.C.

D. None of the above

What is the correct answer?

4

The difference between DOT 3 and DOT 4 brake fluids is

A. DOT 4 fluids have a higher boiling point than DOT 3 fluid

B. DOT 4 fluids have a lower boiling point than DOT 3 fluid

C. DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life

D. DOT 4 fluid is more resistant to freezing than DOT 3 fluid

What is the correct answer?

4

Damper is also known as

A. Shock absorber

B. Torsion bar

C. Spring

D. Radius rod

What is the correct answer?

4

The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to

A. Enable the pump's fault diagnosis function to operate

B. Warm up and lubricate the pump

C. Supplies a large amount of fuel and thereby creates a choke effect

D. Pressurise the fuel system before the engine is started

What is the correct answer?

4

The function of antilock brake system (ABS) is that is

A. Reduces the stopping distance

B. Minimises 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

What is the correct answer?

4

The main function of the brake fluid is

A. Lubrication

B. Power transmission

C. Cooling

D. None of these

What is the correct answer?

4

The purpose of transmission in an automobile is

A. To vary the speed of automobile

B. To vary the torque at the wheels

C. To vary the power of automobile

D. None of these

What is the correct answer?

4

It is necessary to maintain the valve clearances as they

A. Reduce the resistance to sliding that occurs between the cam and the tappet

B. Allow for lengthening of the valves owing to the heat of combustion

C. Increase the speed at which the valves move up and down

D. Make the crankshaft turn smoothly

What is the correct answer?

4

The included angle is the sum of the

A. Camber and castor

B. Castor and S.A.I.

C. Camber and S.A.I.

D. Camber and toe in

What is the correct answer?

4

The connecting rods are generally made of ________ shaped crosssection.

A. I

B. C

C. L

D. H

What is the correct answer?

4

The crankcase dilution means

A. Dilution of fuel in the crankcase

B. Dilution of oil by water in the crankcase

C. Dilution of lubrication oil by fuel in the crankcase

D. Dilution of mixture passing through crankcase in two stroke engines

What is the correct answer?

4

The path taken by intake air is

A. Carburettor (or throttle body) air cleaner intake manifold intake ports cylinders

B. Air cleaner carburettor (or throttle body) intake ports intake manifold cylinders

C. Air cleaner intake manifold carburettor (or throttle body) intake ports cylinders

D. Air cleaner carburettor (or throttle body) intake manifold intake ports cylinders