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4

The fuel that detonates easily, is

A. N-heptane

B. Iso-octane

C. Benzene

D. Alcohol

Correct Answer :

A. N-heptane


Related Questions

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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

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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 connecting rod lower end is connected to the relevant ________ of crankshaft.

A. Big end

B. Crank arm

C. Journal

D. Small end

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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 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

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

Engine misfiring is likely to result from

A. Spark plug gap too small

B. Spark plug gap too wide

C. Vapours lock in the fuel only

D. Incorrect fuel air mixture

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4

The fuel that detonates easily, is

A. N-heptane

B. Iso-octane

C. Benzene

D. Alcohol

What is the correct answer?

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 compression ratio in petrol engine is kept less than in Diesel engine because

A. It makes petrol engines lighter

B. Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition

C. Less compression ratio gives better performance

D. It is just customary to have less compression ratio in petrol engines

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4

The connecting rods are generally made of ________ shaped crosssection.

A. I

B. C

C. L

D. H

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4

Bead wires are made of

A. Steel

B. Copper

C. Zinc

D. Aluminium

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4

The antiknock property of compression ignition engine fuel can be improved by adding

A. Tetraethyl lead

B. Trimethyl pentane

C. Amyl nitrate

D. Hexadecane

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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 basic purpose of tyres is to

A. Grip the road and provide good traction

B. Substitute for springs

C. Act as brake

D. None of these

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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

In case of a Diesel car, the pressure at the end of compression is of the order of

A. 15 bar

B. 25 bar

C. 35 bar

D. 45 bar

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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

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

A. Bead

B. Side wall

C. Shoulder

D. Tread

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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

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

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

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

The aluminium alloy is used in cylinder blocks because

A. It is lighter and has good heat dissipation characteristics

B. Material cost is low

C. It does not require any cylinder liners

D. The piston is also made of aluminium alloy

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4

During braking, the brake shoe is moved outward to force the lining against the

A. Wheel piston or cylinder

B. Anchor pin

C. Brake drum

D. Wheel rim or axle

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4

The specific gravity of petrol is about

A. 0.75

B. 0.85

C. 0.95

D. 1.25

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4

A three way catalytic converter

A. Re-circulates exhaust gases

B. Burns fuel vapour gases

C. Reduces N₂, H₂O, and CO₂ emission levels

D. Removes CO, HC, and NO₂ from the exhaust gasses passing through it

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4

Two speed reverse gear arrangements is generally provided in case of

A. Passenger cars

B. Matadors

C. Tractors

D. Trucks

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4

The main function of a master cylinder is to

A. Adjust the extent of brake pedal free play

B. Boost the force applied to brake pedal

C. Convert brake pedal force into hydraulic pressure

D. Ensure that all the wheel brakes are supplied with the same amount of fluid pressure

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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