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Internal Combustion Engines (I.C. Engines) MCQ Questions & Answers | Mechanical Engineering

Learn Internal Combustion Engines (I.C. Engines) MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Internal Combustion Engines (I.C. Engines): MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-3 section-1

Each section contains 100 MCQs on Internal Combustion Engines (I.C. Engines) .
21
A gas engine has a swept volume of 300 cm3 and clearance volume of 25 cm3. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is
Discuss
Answer & Solution
Answer: Option C
Solution:
Actual volume = swept volume × volumetric efficiency
= 300 × 0.88
= 264 cm3
22
The pressure at the end of compression, in diesel engines, is approximately
Discuss
Answer & Solution
Answer: Option D
Solution:
The pressure at the end of compression, in diesel engines, is approximately 35 bar
23
The pressure at the end of compression, in petrol engines, is approximately
Discuss
Answer & Solution
Answer: Option A
Solution:
The pressure at the end of compression, in petrol engines, is approximately 10 bar
24
Air fuel ratio for idling speed of a petrol engine is approximately
Discuss
Answer & Solution
Answer: Option C
Solution:
Air fuel ratio for idling speed of a petrol engine is approximately 10 : 1
25
The specific fuel consumption per BH hour for a petrol engine is approximately
Discuss
Answer & Solution
Answer: Option C
Solution:
The specific fuel consumption per BH hour for a petrol engine is approximately 0.25 kg
26
The specific fuel consumption per BHP hour for diesel engine is approximately
Discuss
Answer & Solution
Answer: Option B
Solution:
The specific fuel consumption per BHP hour for diesel engine is approximately 0.2 kg
27
The maximum propulsive efficiency of a turbojet engine is at a speed of
Discuss
Answer & Solution
Answer: Option C
Solution:
The maximum propulsive efficiency of a turbojet engine is at a speed of 2400 km/h
28
The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of
Discuss
Answer & Solution
Answer: Option A
Solution:
Morse test can be conducted for Multi cylinder engines The purpose of Morse test is to obtain the approximate indicated power of a Multi cylinder engine. It consist of running the engine against the dynamo-meter at a particular speed, cutting out the firing of each cylinder in turn and noting the fall in BP each time while maintaining the speed constant.
29
The air-fuel ratio of the petrol engine is controlled by
Discuss
Answer & Solution
Answer: Option D
Solution:
The air-fuel ratio of the petrol engine is controlled by carburettor
30
The air-fuel ratio in petrol engines is controlled by
Discuss
Answer & Solution
Answer: Option D
Solution:
The air-fuel ratio in petrol engines is controlled by carburetion