IC Engines MCQ

IC Engines MCQ

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  • 31st Aug, 2022

Practice IC Engines MCQ Quiz to Test Your Knowledge

Practice here the best IC Engines MCQ Questions that check your basic knowledge of IC Engines. This IC Engines MCQ Test contains around 20+ Multiple Choice Questions. You have to select the right answer to every question to check your final preparation. apart from this, you can also download here the IC Engines MCQ PDF completely free.

IC Engine MCQ Questions

1) The ignition quality of petrol is expressed by -

  • A. Octane number
  • B.Cetane number
  • C.Calorific value
  • D.All of these

2) The probability of knocking in diesel engines is increased by -

  • A. High self ignition temperature
  • B.Low volatility
  • C.Higher viscosity
  • D.All of these

3) The maximum temperature in the I.C. engine cylinder is of the order of -

  • A. 2000-2500°C
  • B.1500-2000°C
  • C.1000-1500°C
  • D.500-1000°C

4) An engine indicator is used to determine the following

  • A. Temperature
  • B.Speed
  • C.Volume of cylinder
  • D.M.E.P. and I.H.P.

5) The pressure at the end of compression in the case of diesel engine is of the order of

  • A. 12 kg/cm
  • B.35 kg/cm
  • C.20 kg/cm
  • D.6 kg/cm
Download Free : IC Engines MCQ PDF

6) It the temperature of intake air in IC engines is lowered, then its efficiency will

  • A. Decrease
  • B.Increase
  • C.Remain same
  • D.Increase up to certain limit and then decrease

7) Which of the following medium is compressed in a Diesel engine cylinder?

  • A. Air alone
  • B.Air and fuel
  • C.Air and lub oil
  • D.Fuel alone

8) A stoichiometric air-fuel ratio is

  • A. Chemically correct mixture
  • B.Rich mixture for idling
  • C.Lean mixture
  • D.Rich mixture for over loads

9) The compression ignition engines are governed by

  • A. Qualitative governing
  • B.Hit and miss governing
  • C.Quantitative governing
  • D.None of these

10) The reason for supercharging in any engine is to

  • A. Increase efficiency
  • B.Reduce weight and bulk for a given output
  • C.Increase power
  • D.Effect fuel economy

11) The process of breaking up or a liquid into fine droplets by spraying is called

  • A. Carburetion
  • B.Atomization
  • C.Ionization
  • D.Vaporisation

12) In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have

  • A. Low density
  • B.Low temperature
  • C.Long ignition delay
  • D.All of these

13) In loop scavenging, the top of the piston is

  • A. Contoured
  • B.Slanted
  • C.Depressed
  • D.Flat

14) The knocking tendency in compression ignition engines for a given fuel will be

  • A. Enhanced by increasing compression ratio
  • B.Enhanced by decreasing compression ratio
  • C.Dependent on other factors
  • D.None of the above

15) Polymerization is a chemical process in which molecules of a compound become

  • A. Slowed down
  • B.Larger
  • C.Smaller
  • D.Liquid

16) The ratio of the indicated thermal efficiency to the air standard efficiency is known as

  • A. Volumetric efficiency
  • B.Relative efficiency
  • C.Overall efficiency
  • D.Mechanical efficiency

17) Scavenging air in diesel engine means

  • A. Forced air for cooling cylinder
  • B.Air used for combustion sent under pressure
  • C.Burnt air containing products of combustion
  • D.Air used for forcing burnt gases out of engine's cylinder during the exhaust period

18) Engine pistons are usually made of aluminium alloy because it

  • A. Wear is less
  • B.Absorbs shocks
  • C.Is lighter
  • D.Is stronger

19) The air standard efficiency of an I.C. engine depends on (A) Fuel used

  • A. Compression ratio
  • B.Fuel used
  • C.Speed of engine
  • D.None of these

20) The thermal efficiency of a petrol engine is _________ as compared to diesel engine.

  • A. Less
  • B.Same
  • C.More
  • D.None of these

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