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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

Correct Answer :

D. 1143 N


Related Questions

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4

The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as

A. Supercharging

B. Auto ignition

C. Scavenging

D. Detonation

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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 connecting rod connects the piston and the

A. Cylinder head

B. Cylinder block

C. Camshaft

D. Crankshaft

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4

The formula for Isooctane is

A. C8H18

B. C7H17

C. C6H18

D. C7H18

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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

Clutch facings are usually attached to the plate by

A. Steel rivets

B. Brass rivets

C. Aluminium screws

D. Steel screws

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4

The correct flow of power through the drive train is

A. Engine drive shafts, clutch, main shaft, counter shaft, final driven gear, wheels

B. Engine clutch, main shaft, counter shaft, final driven gear, drive shafts, wheels

C. Engine clutch, counter shaft, main shaft, final driven gear, drive shafts, wheels

D. Engine main shaft, counter shaft, clutch, final driven gear, drive shafts, wheels

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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

The oil pump is driven by the

A. Camshaft

B. Alternator shaft

C. Crankshaft via drive belt

D. Crankshaft directly

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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

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 self ignition temperature of Diesel as compared to petrol is

A. Higher

B. Lower

C. Same

D. Depends on fuel quality

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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 petrol 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 acid used in automobile battery is

A. Hydrochloric acid

B. Hydrofluoric acid

C. Nitric acid

D. Sulphuric acid

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4

The power actually developed inside the engine cylinder is called as

A. Indicated power

B. Brake power

C. Frictional power

D. None of these

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4

The most accurate ignition system of a spark ignition engine is

A. Magneto system

B. Battery system

C. Electronic control unit system

D. Magneto and electronic system

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4

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

A. Seat belt

B. Brake

C. Airbag

D. Steering

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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

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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

Odometer is an instrument used for measurement of

A. Power

B. Fuel consumption

C. Engine r.p.m.

D. Distance

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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 a ventilated disc brake

A. A duct directs air towards the caliper for cooling while the vehicle is moving

B. Caliper is covered with cooling fins

C. Disc contains many small holes for optimum cooling performance

D. Disc contains radial vanes between its rubbing surfaces for optimum cooling performance

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4

The positive 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

The rolling resistance is because of the friction between the

A. Wheel rim and tyre

B. Tyre and the road surface

C. Wheel rim and road surface

D. None of these

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4

An imbalance wheel during vehicle operation

A. Makes large noise when its heavy point hits the road surface

B. Deflects in the vehicle's longitudinal direction

C. Bounces vertically or deflects from side to side (as seen from front or rear)

D. Creates a standing wave

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4

When the front wheels of a vehicle are locked during braking, then

A. Stopping distance becomes extremely long

B. Front tyres skid across the road surface, and the vehicle spins around

C. Rear tyres skid across the road surface, and the vehicle spins around

D. Driver loses control over the steering, and the vehicle continues moving in its current direction

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4

The vehicle ride will be comfortable if

A. Unsprung mass is kept minimum

B. Sprang mass is kept minimum

C. Vehicle mass is kept minimum

D. All of these

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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 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