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Current Affairs January 2024

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4

Which part of the automobile tyre is subjected to greatest flexing action?

A. Bead

B. Side wall

C. Shoulder

D. Tread

Correct Answer :

B. Side wall


Related Questions

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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)

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4

The characteristic that is enhanced by the use of cylinder sleeves is

A. Cooling efficiency

B. Resistance to wear

C. Lubrication performance

D. None of these

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4

The cetane number of a Diesel fuel is a measure of

A. Volatility

B. Viscosity

C. Ignition quality

D. Delay period

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4

An imbalance wheel during vehicle operation

A. Makes large noise when its heavy point hits the road surface

B. Deflects in the vehicle's longitudinal direction

C. Bounces vertically or deflects from side to side (as seen from front or rear)

D. Creates a standing wave

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4

The oil pump is driven by the

A. Camshaft

B. Alternator shaft

C. Crankshaft via drive belt

D. Crankshaft directly

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4

The minimum parking brake force is generally ________ of gross vehicle mass (GVM).

A. 5 %

B. 10 %

C. 15 %

D. 20 %

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4

The main merit of a multi cylinder type cylinder sleeve is

A. Smaller engine dimensions

B. Better cooling efficiency

C. High rigidity

D. None of these

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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 number of exhaust manifolds in a V6 engine is

A. One

B. Two

C. Four

D. Eight

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4

In order to implement gear changes in the gear unit of an automatic transmission, a ________ is used.

A. Synchronizer

B. Planetary gear

C. Magnetic clutch

D. Hydraulic multi plate clutch

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4

The main function of an exhaust muffler is the

A. Optimisation of exhaust efficiency

B. Reduction of exhaust noise

C. Reduction of nitrogen oxide in the exhaust gases

D. Reduction of the exhaust gas volume

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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

If clearance volume of I.C. engines is increased, the compression ratio will

A. Increase

B. Decrease

C. Remain constant

D. Be doubled

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4

The gear shift lever requires two separate motions to shift gears, and the first movement

A. Moves the synchronizer

B. Selects the synchronizer

C. Meshes the gears

D. Operates the clutch

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4

The lower cylindrical portion of the piston which improves piston cooling performance is called

A. Piston crown

B. Connecting rod

C. Piston pin boss

D. Piston skirt

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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

The function of a connecting rod is

A. To turn the flywheel

B. To drive the drive plate

C. To drive the fuel pump

D. To transmit motion of the piston to the crankshaft

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4

A laminated glass upon cracking

A. Bursts into sharp edged fragments

B. Bursts into granular pieces

C. Sandwiched layer traps the fragments

D. Breaks into the form of crystals

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4

The most commonly used power plant in automobiles is

A. Gas turbine

B. I.C. engine

C. Battery

D. None of these

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4

The function of a second ring is that it is a

A. Back up compression ring which will work in place of the top ring when it is broken

B. Compression ring and aids the top ring in sealing and cooling

C. Back up oil control ring which will work in place of the bottom ring when it is broken

D. Cushion ring which prevents piston slap and knock

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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

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4

The coefficient of friction for the clutch facing is approximately

A. 0.1

B. 0.4

C. 0.8

D. 1.2

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4

When the battery is half (50%) charged, the specific gravity of acid in a battery is usually

A. 0.74

B. 1.00

C. 1.12

D. 1.19

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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

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4

The cetane rating of Diesel fuel is in the order of

A. 25

B. 45

C. 70

D. 90

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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

The main characteristics of a maintenance free (MF) battery is that

A. A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid

B. A maintenance free battery has a relatively short shelf life when compared with standard batteries

C. Since it is sealed, the water in maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water

D. Recharging of a maintenance free battery is neither required nor possible

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4

The firing order for an opposed four cylinder l.C. engine is

A. 1-2-3-4

B. 1-3-4-2

C. 1-4-3-2

D. 1-3-2-4

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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

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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