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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

Correct Answer :

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


Related Questions

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4

The engine oil is stored in __________ when the engine is not running.

A. Oil pan

B. Cylinder head

C. Oil pump

D. Separate oil tank

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4

Damper is also known as

A. Shock absorber

B. Torsion bar

C. Spring

D. Radius rod

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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

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

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 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 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 battery is an electrochemical device, which means battery

A. Makes chemicals by mechanical means

B. Uses chemical action to provide electricity

C. Has curved plates instead of flat plates

D. Does not use an electrolyte

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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 engine oil level should be checked

A. Immediately after the ignition switch is turned off

B. While the engine is running

C. A few minutes after the ignition switch is turned off

D. While the engine is running at high idle speed

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4

The two rows of cylinders in a 'V' type engine are generally arranged at

A. 45°

B. 60°

C. 90°

D. 130°

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4

The connecting rod is attached to the piston by the

A. Cap bolt

B. Piston pin

C. Cap roller bearing

D. Rod cap

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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

When indicated power (I.P.) and frictional power (F.P.) are known, we can calculate

A. Brake power

B. Compression ratio

C. Specific air consumption

D. Mean effective pressure

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4

The problems caused by the wheel imbalance are

A. Hard steering and hard ride

B. Poor acceleration and hard steering

C. Steering wheel vibrations and uneven tyre wear

D. Poor acceleration and reduced fuel efficiency

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4

In a four wheel drive (4WD), the numbers of gear boxes are

A. 1

B. 2

C. 3

D. 4

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4

The best fuels for compression ignition engines are

A. Straight chain paraffin

B. Aromatics

C. Branched chain paraffin

D. Naphthalene

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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

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 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 operation of removing trapped air from the hydraulic braking system is known as

A. Trapping

B. Tapping

C. Bleeding

D. Cleaning

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4

The basic function of the suspension is to

A. Absorbs vibration and impact forces from the road surface

B. Ensure that the steering wheel can deliver a suitable amount of steering force

C. Ensure that wheel alignment is not disturbed during driving

D. Automatically correct the effects of over steering

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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 valve overlap in four stroke petrol engines is approximately

A. 30°

B. 60°

C. 90°

D. 120°

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4

The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is

A. Brake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads

B. Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads

C. Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads

D. Brake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads

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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 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

The painting of automobiles is done to

A. Prevent rust from growing on the body

B. Improve its external appearance

C. Retain the characteristics of steel for long

D. All of these

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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 clutch is located between the transmission and the

A. Engine

B. Rear axle

C. Propeller shaft

D. Differential