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Current Affairs January 2024

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4

The basic purpose of tyre rotation on automobiles is to

A. Avoid ply separation

B. Equalize wear

C. Get better ride

D. None of these

Correct Answer :

B. Equalize wear


Related Questions

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4

The camshaft of a four stroke Diesel engine running at 1000 rpm will run at

A. 500 rpm

B. 1000 rpm

C. 2000 rpm

D. 4000 rpm

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4

The advantage of a tubeless tyre over tube type tyre is

A. Slow air leakage

B. Better fuel efficiency

C. Less chances of running flat

D. All of these

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4

Which of the following oil is more viscous?

A. SAE 30

B. SAE 40

C. SAE 70

D. SAE 80

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4

When a gear box has four forward speeds and one reverse speed, it is said to be a

A. 3-speed gear box

B. 4-speed gear box

C. 5-speed gear box

D. 6-speed gear box

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4

The aspect ratio (expressed in percentage) of the tyre is defined as the ratio of

A. Section width to section height

B. Section height to section width

C. Wheel diameter to section height

D. Wheel diameter to section width

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4

The air gap between the central electrode and ground (or side) electrode of a spark plug is around

A. 0.2 mm

B. 0.5 mm

C. 1 mm

D. 1.5 mm

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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

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4

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

A. Clutch

B. Differential

C. Flywheel

D. Torque converter

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4

In bias ply tyres

A. All plies run parallel to one another

B. Belts of steel mesh are used in the tyres

C. One ply layer runs diagonally one way and another layer runs diagonally the other way

D. All of the above

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4

A petrol engine of a car develops 125 Nm torque at 2700 r.p.m. The car is driven in second gear having gear ratio of 1.75. The final drive ratio is 4.11. If the overall transmission efficiency is 90%, then the torque available at the driving wheels is

A. 8.091 Nm

B. 80.91 Nm

C. 809.1 Nm

D. 8091 Nm

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4

Highest useful compression ratio (HUCR) is the highest compression ratio at which the

A. Engine can run

B. Engine gives maximum output

C. Engine is most efficient

D. Fuel can be used in a test engine without knocking

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4

In a petrol engine, the high voltage for spark plug is in the order of

A. 1000 volts

B. 2000 volts

C. 11 kilovolts

D. 22 kilovolts

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4

The main cause for the change in engine oil viscosity is

A. Humidity

B. Temperature

C. Vibration

D. Contamination

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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

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4

If the air-fuel mixture in a spark ignition engine is too rich, then airfuel ratio is about

A. 17 : 1

B. 15 : 1

C. 13 : 1

D. 10 : 1

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4

Incorrect steering axis inclination (S.A.I.) causes

A. Tendency to assume toe-out orientation

B. Generation of a braking effect at tight corners

C. Poor recovery of the steering wheel after making a turn

D. The vehicle to pull to the side of lesser inclination

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4

The information provided by the oxygen (O₂) sensor to the feedback control system is about the

A. Air-fuel ratio

B. Air temperature

C. Air flow speed

D. Exhaust gas volume

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4

The compression ratio of a petrol engine is nearly

A. 4 : 1

B. 8 : 1

C. 15 : 1

D. 20 : 1

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4

The motion of the cam is transferred to the valves through

A. Pistons

B. Rocker arms

C. Camshaft pulley

D. Valve stems

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4

In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is

A. 1

B. 2

C. 3

D. 4

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4

The basic characteristics of a brake fluid is

A. A high boiling point

B. Low viscosity

C. Compatibility with rubber and metal parts

D. All of these

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4

The exhaust gas from petrol engine contains

A. Petrol vapours

B. Water vapours

C. Carbon monoxide

D. All of these

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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

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4

Free pedal play in car clutches is about

A. 15 mm

B. 25 mm

C. 40mm

D. 60 mm

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4

Clutch facings are usually attached to the plate by

A. Steel rivets

B. Brass rivets

C. Aluminium screws

D. Steel screws

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4

In a forced feed lubrication system, the device used to guard against excessive oil pressure, is known as

A. Release chamber

B. Balancer

C. Relief valve

D. Stop valve

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4

Engine misfiring is likely to result from

A. Spark plug gap too small

B. Spark plug gap too wide

C. Vapours lock in the fuel only

D. Incorrect fuel air mixture

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4

In a hydraulic power steering system, the power steering pump is driven by a

A. Belt driven by camshaft

B. Chain driven by crankshaft

C. Belt driven by driveshaft

D. Belt driven by crankshaft

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4

During suction stroke, the inside pressure of cylinder is

A. More than the atmospheric pressure

B. Less than the atmospheric pressure

C. Equal to the atmospheric pressure

D. None of these

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4

The air resistance to a car at 20 kmph is R. The air resistance at 40 kmph will be

A. R

B. 2 R

C. 4R

D. 4 R²