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4

The Diesel engine works on

A. Otto cycle

B. Carnot cycle

C. Diesel cycle

D. Rankine cycle

Correct Answer :

C. Diesel cycle


Related Questions

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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

Free pedal play in car clutches is about

A. 15 mm

B. 25 mm

C. 40mm

D. 60 mm

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4

The indicated power of a four stroke engine (in watts) is equal to (where P = Mean effective pressure in N/m², L = Length of stroke in metres, A = Cross-sectional area of the piston in m², and N = Speed of the engine in revolutions per second (r.p.s)

A. P.L.A.N/2

B. P.L.A.N

C. 2 × P.L.A.N

D. P.L.A.N/4

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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

Caster is a

A. Forward tilt of the kingpin

B. Backward tilt of the kingpin

C. Either 'A' or 'B'

D. None of these

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4

The purpose of transmission in an automobile is

A. To vary the speed of automobile

B. To vary the torque at the wheels

C. To vary the power of automobile

D. None of these

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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 main function of an exhaust muffler is the

A. Optimisation of exhaust efficiency

B. Reduction of exhaust noise

C. Reduction of nitrogen oxide in the exhaust gases

D. Reduction of the exhaust gas volume

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4

The two kinds of piston rings are

A. Compression and oil control rings

B. Compression and sliding seal rings

C. Oil scrapper and oil control rings

D. Pressure and sealing rings

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4

The driveshafts are connected to the differential and wheel hubs through universal joints because the universal joints

A. Absorb the vibrations transferred from the surface of the road

B. Compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.

C. Absorb any difference in speed between the left and right wheels when the vehicle is turning

D. None of the above

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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

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

Petrol that detonates easily is called

A. High octane petrol

B. Low octane petrol

C. Unleaded petrol

D. Blended fuel

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4

For the same maximum pressure and temperature

A. Diesel cycle is more efficient than Otto cycle

B. Otto cycle is more efficient than Diesel cycle

C. Both Otto cycle and Diesel cycle are equally efficient

D. None of the above

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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 is not an automobile?

A. Motor cycle

B. Passenger car

C. Aeroplane

D. Truck

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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 path taken by intake air is

A. Carburettor (or throttle body) air cleaner intake manifold intake ports cylinders

B. Air cleaner carburettor (or throttle body) intake ports intake manifold cylinders

C. Air cleaner intake manifold carburettor (or throttle body) intake ports cylinders

D. Air cleaner carburettor (or throttle body) intake manifold intake ports cylinders

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4

The discharged lead acid battery has on its plates

A. Lead peroxide (PbO₂)

B. Spongy lead (Pb)

C. Lead sulphate (PbSO₄)

D. Sulphuric acid (H₂SO₄)

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4

The main feature of Macpherson strut suspension is that

A. The vertical size of the suspension can be made more compact

B. Non vertical external forces are supported by the suspension arms

C. The unsprung mass in lighter

D. The assembly is slightly more complicated in design

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4

The specific gravity of Diesel is about

A. 0.65

B. 0.75

C. 0.85

D. 0.95

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4

The main function of the tread pattern on tyre is that

A. The tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating

B. The crests between the tread grooves absorb road noise

C. In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface

D. The tread pattern protects the tyre's inner carcass from small stones and pieces of glass

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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 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 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 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

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 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

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 main function of intake manifold is that it

A. Promotes the mixture of air and fuel

B. Reduces intake noise

C. Cools the intake air to a suitable temperature

D. Distributes intake air equally to the cylinders