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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-8 section-1

Each section contains 100 MCQs on Internal Combustion Engines (I.C. Engines) .
71
The two reference fuels used for cetane rating are
Discuss
Answer & Solution
Answer: Option B
Solution:
The two reference fuels used for cetane rating are Cetane and alpha-methyl naphthalene
72
For the same power developed in I.C. engines, the cheaper system is
Discuss
Answer & Solution
Answer: Option B
Solution:
For the same power developed in I.C. engines, the cheaper system is Supercharged
73
As compared to air standard cycle, in actual working, the effect of variation in specific heats is to
Discuss
Answer & Solution
Answer: Option B
Solution:
As compared to air standard cycle, in actual working, the effect of variation in specific heats is to Reduce maximum pressure and maximum temperature
74
The expansion of fuel in a four stroke cycle diesel engine
Discuss
Answer & Solution
Answer: Option C
Solution:
The expansion of fuel in a four stroke cycle diesel engine Starts at 15° after top dead center and ends at 30° before bottom dead center
75
The fuel valve in a four stroke cycle diesel engine
Discuss
Answer & Solution
Answer: Option B
Solution:
The fuel valve in a four stroke cycle diesel engine Opens at 15° before top dead center and closes at 20° after top dead center
76
In a typical medium speed, 4-stroke cycle diesel engine
Discuss
Answer & Solution
Answer: Option A
Solution:
In a typical medium speed, 4-stroke cycle diesel engine Fuel injection starts at 10° before top dead center and ends at 20° after top dead center
77
In a typical medium speed 4-stroke cycle diesel engine
Discuss
Answer & Solution
Answer: Option A
Solution:
In a typical medium speed 4-stroke cycle diesel engine Compression starts at 35° after bottom dead center and ends at top dead center
78
The exhaust valve in a four stroke cycle petrol engine
Discuss
Answer & Solution
Answer: Option A
Solution:
The exhaust valve in a four stroke cycle petrol engine Opens at 50° before bottom dead center and closes at 15° after top dead center
79
For the same compression ratio
Discuss
Answer & Solution
Answer: Option A
Solution:
For the same compression ratio Otto cycle is more efficient than the Diesel
80
The ratio of the brake power to the indicated power is called
Discuss
Answer & Solution
Answer: Option A
Solution:
The ratio of the brake power to the indicated power is called Mechanical efficiency