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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-2 section-2

Each section contains 100 MCQs on Internal Combustion Engines (I.C. Engines) .
11
If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be
Discuss
Answer & Solution
Answer: Option D
Solution:
If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be 14%
12
Supercharging is essential in
Discuss
Answer & Solution
Answer: Option D
Solution:
Supercharging is essential in aircraft Engines
13
Which of the following statement is correct regarding petrol engines?
Discuss
Answer & Solution
Answer: Option B
Solution:
The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug
14
The firing order in an I.C. engine depends upon
Discuss
Answer & Solution
Answer: Option D
Solution:
The order in which the ignition take place in various cylinders of a multi cylinder engine is called firing order. Every engine cylinder must fire once in every cycle. Three factors must be considered before deciding the firing order in I.C. engine. These are
- Arrangement of the cylinders
- Design of crankshaft
- Number of cylinders
15
The colour of exhaust from diesel engine is generally
Discuss
Answer & Solution
Answer: Option C
Solution:
The colour of exhaust from diesel engine is generally black
16
A heat engine utilizes the
Discuss
Answer & Solution
Answer: Option C
Solution:
A heat engine utilizes the High heat value of oil. heat engine is a system that converts heat or thermal energy and chemical energy to mechanical energy, which can then be used to do mechanical work. It does this by bringing a working substance from a higher state temperature to a lower state temperature.
17
In the opposed piston diesel engine, the combustion chamber is located
Discuss
Answer & Solution
Answer: Option C
Solution:
In the opposed piston diesel engine, the combustion chamber is located between the Piston
18
A mixture containing 65% of iso-octane and 35% of normal heptane will have
Discuss
Answer & Solution
Answer: Option B
Solution:
A mixture containing 65% of iso-octane and 35% of normal heptane will have Octane number 65
19
If the speed of the engine is increased, the indicated power will
Discuss
Answer & Solution
Answer: Option A
Solution:
If the speed of the engine is increased, the indicated power will Increase
20
The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called
Discuss
Answer & Solution
Answer: Option C
Solution:
The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called Relative efficiency