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Current Affairs January 2024

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4

In Diesel engines, during suction stroke, ________ is drawn in the cylinder.

A. Air and fuel

B. Only fuel

C. Only air

D. None of these

Correct Answer :

C. Only air


Related Questions

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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

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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

The formula for Isooctane is

A. C8H18

B. C7H17

C. C6H18

D. C7H18

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4

Which one of the following statement correctly describes the construction of a bevel gear type differential?

A. The drive shafts are splined to the differential carrier.

B. The left side gear and the differential carrier rotate in constant unison.

C. The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

D. The differential carrier houses differential pinion gears and side gears

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4

The natural gas is compressed in a CNG cylinder at a pressure of

A. 200 bar

B. 220 bar

C. 250 bar

D. 300 bar

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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 condition that causes vapour locking in a brake system is

A. Overheating of the fluid due to frequent brake application

B. Overcooling of the brakes during high speed driving

C. Keeping the vehicle without use for an extended period

D. An excessively high engine speed on a downhill road

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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

How many cells are used in a 12 volt car battery?

A. 2

B. 4

C. 6

D. 8

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4

The ignition coil is used to

A. Step up current

B. Step down current

C. Step up voltage

D. Step down voltage

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4

When the top of the wheel is tilted outward, then it is called

A. Positive camber

B. Negative camber

C. Positive caster

D. Negative caster

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4

A battery can be charged by

A. Adding distilled water

B. Adding sulphuric acid

C. Applying voltage in the reverse direction to that of charging

D. Applying a voltage in the same direction to that of charging

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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 frequency of flashing of light per minute in a direction (side turn) indicator is about

A. 9

B. 90

C. 900

D. 9000

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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.

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4

The purpose of a thermostat in an engine cooling system is to

A. Prevent the coolant from boiling

B. Allow the engine to warm up quickly

C. Indicate the coolant temperature

D. Pressurise the system to raise the boiling point

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4

The most effective method of controlling S.I. engine exhaust emission is by

A. Recirculating exhaust

B. Using catalytic converter

C. Using some additives in the fuel

D. None of these

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4

The engine oil viscosity is defined by _________ ratings.

A. Automatic transmission fluid (ATF)

B. Society of automotive engineers (SAE)

C. Gross vehicle weight (GVW)

D. American petroleum institute (API)

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4

Thinner is added to the paint in order to

A. Make pigments and resin mix easily

B. Make paint film hard

C. Optimise its viscosity

D. None of these

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4

The composition of the electrolyte in a fully charged battery is that

A. The electrolyte is pure distilled water

B. The electrolyte is pure sulphuric acid

C. The electrolyte is a mixture of 64% distilled water and 36% sulphuric acid by weight

D. The electrolyte is a mixture of 90% distilled water and 10% sulphuric acid by weight

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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

The coefficient of rolling resistance for a truck weighing 63,500 N is 0.018. The rolling resistance to the truck is

A. 1.143 N

B. 11.43 N

C. 114.3 N

D. 1143 N

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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

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4

The torque available at the contact between driving wheels and road is known as

A. Brake effort

B. Tractive effort

C. Clutch effort

D. None of these

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4

The major purpose of an electronically controlled automatic transmission is that this type of transmission

A. Eliminates gear clutches

B. Eliminates the gear shaft lever

C. Reduces the number of automatic transmission components

D. Reduces shift shock and achieves more efficient transmission of engine torque

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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

An oil filter bypass valve opens when the

A. Engine is cold

B. Engine overheats

C. Oil filter becomes clogged

D. Engine runs at high speed

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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

The materials used for cylinder block are

A. Cast iron and steel

B. Cast iron and aluminium alloy

C. Steel and aluminium alloy

D. Brass and steel

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4

The most commonly used supplementary restraint system (SRS) component is

A. Seat belt

B. Brake

C. Airbag

D. Steering