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4

In a Diesel engine, the function of a fuel injector is to

A. Mix the fuel and air

B. Ignite the air-fuel mixture

C. Provide flame front for ignition

D. Spray atomized fuel in the cylinder

Correct Answer :

D. Spray atomized fuel in the cylinder


Related Questions

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4

The lubrication oil flow in an engine is in the order as

A. Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan

B. Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan

C. Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan

D. Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan

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4

The formula for Isooctane is

A. C8H18

B. C7H17

C. C6H18

D. C7H18

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4

The rating of C.I. engine fuel (Diesel) is given by

A. Octane number

B. Performance number

C. Cetane number

D. None of these

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4

The caster is called positive when the top of the king pin is inclined to the

A. Rear of the vehicle

B. Front of the vehicle

C. Left of the vehicle

D. Right of the vehicle

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4

Damper in an automobile is used to

A. Absorb the energy

B. Dissipate the energy

C. Release the energy

D. Increase the energy

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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 crescent shaped cavity on the piston head top surface is called as

A. Piston oil hole

B. Snap ring

C. Valve recess

D. Valve clearance

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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

A basic difference between the spark ignition engine and the Diesel engine is that the

A. Diesel engine compresses air alone instead of an air-fuel mixture

B. Air temperature ignites the fuel in the Diesel engine

C. Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke

D. All of the above

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4

The stroke of an engine is the

A. Volume of the cylinder

B. Length of the connecting rod

C. Internal diameter of the cylinder

D. Distance between T.D.C. and B.D.C.

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4

The condition that results in large quantities of CO emission is

A. Insufficient air during combustion

B. Insufficient fuel during combustion

C. Low temperature combustion

D. High temperature combustion

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4

Which of the following bulb in a car will have the least wattage?

A. Head light bulb

B. Stop light bulb

C. Parking light bulb

D. Ignition warning bulb

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4

The function of a governor in automobiles is to

A. Limit the power

B. Limit the vehicle speed

C. Maintain constant engine speed

D. Maximise the fuel economy

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4

The boiling point of Diesel fuel is in the range of

A. 70°C to 100°C

B. 100°C to 120°C

C. 120°C to 180°C

D. 180°C to 360 °C

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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

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 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 a Diesel engine, the fuel is ignited by

A. An electric spark

B. The heat of compression

C. The hot exhaust

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 compression ratio for Diesel engines usually lies in the range of

A. 6-10

B. 10-1

C. 15-25

D. 25-40

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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

Which of the following is not an automobile?

A. Motor cycle

B. Passenger car

C. Aeroplane

D. Truck

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4

In a Diesel engine, the function of a fuel injector is to

A. Mix the fuel and air

B. Ignite the air-fuel mixture

C. Provide flame front for ignition

D. Spray atomized fuel in the cylinder

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4

The order in which effort applied to the steering wheel is transferred to the front wheel is

A. Steering wheel, steering gearbox, steering shaft, tie rod, steering knuckle, front wheels

B. Steering wheel, steering shaft, steering gearbox, tie rod, steering knuckle, front wheels

C. Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels

D. Steering wheel, tie rod, steering gearbox, steering shaft, steering knuckle, front wheels

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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 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 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

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4

If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is

A. 175

B. 65

C. 14

D. 82

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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 main purpose of an engine's air cleaner is that it

A. Controls the engine's air intake volume

B. Reduces the engine's air intake noise

C. Prevents rain water from entering the engine

D. Prevents dust and other foreign matter from entering the engine