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Diesel Vs Petrol Engine MCQ Questions & Answers

Diesel Vs Petrol Engine MCQs : This section focuses on the "Diesel Vs Petrol Engine". These Multiple Choice Questions (MCQs) should be practiced to improve the Diesel Vs Petrol Engine skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

What will be the temperature, at which 28g nitrogen occupies a volume of 10 litres at 2.46 atmospheric pressure?

A. 319.48 K
B. 456.23 K
C. 299.64 K
D. 123.45 K

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Question 2

A tractor tyre contains 28 litre of air at 184 kPa pressure and 27°C temperature. How much air does the tyre contain?

A. 0.0599 kg
B. 0.599 kg
C. 55.059 kg
D. 5.99 kg

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Question 3

Which of the following is not a function of a flywheel?

A. It stores energy during power stroke and returns back the same energy during the idle strokes, providing a rotary motion
B. It carries ring gear that meshes with the pinion of starting motor
C. It is used to join the connecting rod to piston
D. It serves the purpose of a pulley for transmitting power

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Question 4

Which of the following is not an example of drawbar dynamometer?

A. Spring dynamometer
B. Hydraulic dynamometer
C. Electrical dynamometer
D. Strain gauge dynamometer

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Question 5

What is the clearance between rocker arm and valve stem is known as _______

A. Valve clearance
B. Sleeve
C. Tappet clearance
D. Buffer space

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Question 6

A diesel engine transmits 25 KW at the end of the crankshaft, moving at 1650 rev/min, find the torque exerted by the piston.

A. 148.90 Newton-metre
B. 144.75 Newton-metre
C. 150.75 Newton-metre
D. 120.10 Newton-metre

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Question 7

A high-speed diesel engine operating at 2000 rev/min has a single cylinder. During the compression stroke, the fuel injection starts 20° before TDC and ends at TDC. Determine the duration the fuel injection takes place.

A. 1/600 seconds
B. 2/248 seconds
C. 1/60 seconds
D. 2/319 seconds

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Question 8

The process of removal of burnt or exhaust gases from the engine cylinder is known as ___________

A. Tappet
B. Skirt
C. Scavenging
D. Suction

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Question 9

What is the detachable portion of engine, which covers the upper end of the cylinder known as ______

A. Cylinder head
B. Ignition cell
C. Combustion cell
D. Manifold

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Question 10

The minimum temperature required for a liquid fuel to form a spontaneously combustible mixture is known as ____________

A. Flash point
B. Fluid coupling
C. Differential
D. Disc brake

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Question 11

The device in which air-fuel mixture is prepared away from the cylinder of an engine is known as __________

A. Lubricant
B. Delivery valve
C. Nozzle holder
D. Carburettor

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Question 12

The first I.C. engine was invented by _______

A. Nikolaus Otto
B. James Watt
C. Hudson
D. Norman

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Question 13

1 kg of air is compressed from 40 m3 volume under 100 kPa pressure to 1 m3 volume. What will be the pressure at constant temperature?

A. 5000 kPa
B. 6170 kPa
C. 3215 kPa
D. 4000 kPa

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Question 14

The function of piston pin is to _________

A. Absorb the cylinder heat
B. Join the connecting rod to the piston
C. Increase the speed
D. Joint wheel and connecting rod

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Question 15

A cylinder can withstand the L.P.G. at 16.7 atmospheric pressure, if at any time instant the inside pressure of L.P.G. becomes 13 atmosphere pressures at 27°C. Then what will be the temperature at which it will explode?

A. 116.7°C
B. 114.1°C
C. 112.1°C
D. 111.6°C

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Question 16

7 gram of gas occupies a volume of 4.1 litre at 300°K temperature and 1 atmospheric pressure. What will be the molecular mass of gas?

A. 78.19
B. 42.05
C. 35.65
D. 18.19

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Question 17

Which engine is designed to convert chemical energy of heavier fuel oil into mechanical energy?

A. Diesel engine
B. Petrol engine
C. Injector
D. Tappet clearance

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Question 18

A six-cylinder 4-stroke engine has bore diameter 11 cm and stroke length 12.2 cm running at 2800 rev/min consumes 455m2 of air per hour. What would be the volumetric efficiency of the engine?

A. 75%
B. 78.70%
C. 77.80%
D. 76%

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Question 19

The correct way of representing the compression ratio is __________

A. C.R.=\(\frac{Total \, cylinder \, volume}{Clearance \, Volume} \)
B. C.R.=\(\frac{Clearance \, Volume}{Total \, Clearance \, Volume} \)
C. C.R.=\(\frac{Total \, clearance \, volume}{Cylinder \, Volume} \)
D. C.R.=\(\frac{Clearance \, volume}{Total \, cylinder \, volume} \)

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Question 20

Where are manifolds fitted?

A. The lower part of cylinder
B. The intake valves
C. The exhaust valves
D. The side of the cylinder

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