Practice 1000 Ic Engine Multiple Choice Questions with Answers Quiz-1

Q.1.

Indicated power of a 4-stroke engine is equal to ___________

a) 4pLAN
b) pLAN/2
c) pLAN
d) 2pLAN

Q.2.

The thermal efficiency of diesel engines is about ___________

a) 65%
b) 50%
c) 80%
d) 70%

Q.3.

What is the combustion in spark ignition engine?

a) heterogeneous
b) laminar
c) homogeneous
d) none of the mentioned

Q.4.

The following volume of air is required for consuming 1 litre of fuel by a four stroke engine is?

a) 5-6m3
b) 9-10m3
c) 2.5m3
d) 1m3

Explanation

Q.5.

The major loss in a S.I. engine is due to ____________

a) variation in specific heat and chemical equilibrium
b) pumping
c) exhaust blow down
d) incomplete combustion

Explanation

Q.6.

What is the firing order of a six stroke I.C. engine?

a) 1-5-3-4-2-6
b) 1-3-6-5-2-4
c) 1-4-2-5-6-3
d) 1-6-2-5-4-3

Explanation

Q.7.

Which of the following is the most preferred S.I. engines fuel?

a) napthenes
b) olefins
c) aromatics
d) paraffins

Explanation

Q.8.

Which of the following statement is not correct with respect to alcohols as alternate fuel in IC engines?

a) alcohol contains about half the heat energy of gasoline/litre
b) alcohol does not vaporize as easily as gasoline
c) alcohols are corrosive in nature
d) anti-knock characteristics of alcohol is poor

Explanation

Q.9.

Which of the following is the anti-knock for compression ignition engines?

a) amyl nitrate
b) naphthene
c) hexadecane
d) tetra ethyl lead

Explanation

Q.10.

Which of the following does not relate to spark ignition engine?

a) Spark plug
b) Carburetor
c) Fuel injector
d) Ignition coil

Explanation

Q.11.

Which is the most effective air cleaner in the case of diesel engines?

a) whirl type
b) oil bath type
c) wet type
d) dry type

Explanation

Q.12.

An SI engine sometimes continues to run for a very small period even after the ignition is switched off. This phenomenon is called?

a) throttling
b) idling
c) dieseling
d) none of the mentioned

Explanation

Q.13.

Which are the most important requirements of an automobile carburetor?

a) ensuring full torque at low speeds
b) good fuel economy
c) absence of racing of the engine under idling conditions
d) all of the mentioned

Q.14.

The number of holes in a multi-hole nozzle, varies from ___________

a) 4 to 8
b) 4 to 18
c) 4 to 12
d) none of the mentioned

Explanation

Q.15.

Gasoline engines are _____________ than diesel engines.

a) lighter
b) unpredictable
c) heavier
d) none of the mentioned

Explanation

Q.16.

Formation of ice on the _____________ plate is eliminated in electronic fuel injection.

a) engine
b) throttle
c) nozzle
d) none of the mentioned

Explanation

Q.17.

The timing of injection has to be advanced as the speed _____________

a) increases
b) stables
c) decreases
d) none of the mentioned

Explanation

Q.18.

The ignition timing is affected by _____________

a) engine speed
b) mixture strength
c) compression ratio
d) all of the mentioned

Explanation

Q.19.

Which of the following factors affecting combustion in the CI engine?

a) intake temperature
b) jacket water temperature
c) compression ratio
d) all of the mentioned

Explanation

Q.20.

Blow by losses are reduced as the engine speed is ____________

a) reduced
b) unpredictable
c) increased
d) none of the mentioned

Explanation

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