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Current Affairs January 2024

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4

In an engine, the temperature of the piston will be more at the

A. Crown of the piston

B. Skirt of the piston

C. Piston walls

D. Piston rings

Correct Answer :

A. Crown of the piston


Related Questions

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4

The Diesel engines are also known as

A. Spark ignition (S.I.) engines

B. Compression ignition (C.I.) engines

C. Steam engines

D. None of these

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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 purpose of turning radius gauges is to measure the

A. Contact areas of the tyres

B. Free plays of the steering wheel

C. Turning radius of the left and right wheels

D. Difference in the toe angles of the left and right wheels

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4

The material generally used for cylinder sleeves is

A. Aluminium

B. Ceramic

C. Cast iron

D. Fibre reinforced plastic

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4

The ease with which petrol vaporizes is called its

A. Oxidation

B. Octane number

C. Volatility

D. Cetane number

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4

The timing belt is attached to the camshaft pulley and

A. Timing belt drive pulley

B. Distributor

C. Radiator fan pulley

D. Alternator pulley

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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

A front stabilizer bar is used to

A. Increase vehicle load carrying capacity

B. Provide a softer ride

C. Control suspension movement and body roll

D. All of the above

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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

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4

The characteristic that is enhanced by the honing of cylinder sleeves inner surface is

A. Cooling efficiency

B. Resistance to wear

C. Lubrication performance

D. None of these

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4

The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as

A. Indicator diagram

B. Axial force diagram

C. Valve timing diagram

D. None of these

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4

A four cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is

A. 400 cm³

B. 600 cm³

C. 1200 cm³

D. 2400 cm³

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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

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 specific gravity of acid in a fully charged battery is generally

A. 1.00

B. 1.28

C. 1.82

D. 2.81

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4

The seat belt tensioners are built in the

A. Front seats

B. Shoulder anchors

C. Seat belt retractors

D. Seat belt buckles

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4

The starting system includes

A. A battery, a starter, and an ignition switch

B. A battery, a distributor, and an ignition switch

C. A battery, a starter, and a distributor

D. A distributor, a starter, and an ignition switch

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4

The maximum torque multiplication ratio in a torque converter is about

A. 2.5

B. 10

C. 25

D. 40

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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 advantage of having a tandem master cylinder arrangement in automobiles is that it

A. Enhances safety by serving two independent lines in a divided line brake circuit

B. Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss

C. Supplies equal fluid pressure to each line of a divided line brake circuit, thereby preventing the brakes from dragging on one side

D. Boosts the brake fluid pressure to reduce the force required to depress the brake pedal

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4

The valve tappet clearance is measured by

A. Screw pitch gauge

B. Engineering scale

C. Feeler gauge

D. Vernier caliper

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4

The negative terminal post on the top of a battery is

A. Smaller than the positive terminal post

B. Larger than the positive terminal post

C. Of the same size as the positive terminal post

D. None of these

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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

In radial tyres

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

B. All plies run parallel to one another and vertical to tyre bead

C. Inner tubes are always used

D. None of these

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4

An overinflated tyre will wear the tread most near the

A. Edges

B. Corners

C. Centre

D. None of these

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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 damper fluid leakage typically occur from

A. Upper damper mounting

B. Bottom of damper

C. Clearance between inner and outer tubes of damper

D. Coil spring mounting

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4

The purpose of a cylinder head gasket is to

A. Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head

B. Prevent engine oil from going into combustion chamber

C. Removes impurities from cylinder head lubricating oil

D. None of the above

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4

The size of engine cylinder is referred in terms of its

A. Diameter and bore

B. Displacement and efficiency

C. Bore and stroke

D. Bore and length

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4

In Spark Ignition Engine

A. Only air is introduced into the cylinder

B. The mixture of air and fuel is introduced into the cylinder from carburettor

C. Both A and B

D. None of these