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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-4 section-2

Each section contains 100 MCQs on Internal Combustion Engines (I.C. Engines) .
31
The object of supercharging the engine is
Discuss
Answer & Solution
Answer: Option D
Solution:
The object of supercharging the engine is:
- To reduce mass of the engine per brake power
- To reduce space occupied by the engine
- To increase the power output of an engine when greater power is required
32
The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be
Discuss
Answer & Solution
Answer: Option B
Solution:
The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be 50%
33
Stoichiometric ratio is
Discuss
Answer & Solution
Answer: Option B
Solution:
Stoichiometric ratio is Chemically correct air-fuel ratio by volume
34
The object of providing masked inlet valve in the air passage of compression ignition engines is to
Discuss
Answer & Solution
Answer: Option C
Solution:
The object of providing masked inlet valve in the air passage of compression ignition engines is to induce primary swirl
35
A diesel engine, during suction stroke, draws
Discuss
Answer & Solution
Answer: Option A
Solution:
A diesel engine, during suction stroke, draws Air only
36
In a naturally aspirated diesel engine, the air is supplied by
Discuss
Answer & Solution
Answer: Option C
Solution:
In a naturally aspirated diesel engine, the air is supplied by a vacuum chamber
37
In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of
Discuss
Answer & Solution
Answer: Option C
Solution:
In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of 1000°C
38
Detonation is harmful due to
Discuss
Answer & Solution
Answer: Option D
Solution:
Detonation has negative effects throughout the engine. Light detonation may cause premature wear on bearings and bushings. Severe or prolonged detonation can cause damage to the cylinder head and pistons.
39
In a petrol engine, the fuel supplied to the engine cylinder is mixed with required quantity of air and the mixture is ignited with a
Discuss
Answer & Solution
Answer: Option C
Solution:
Spark plug is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine. A spark plug has a metal threaded shell, electrically isolated from a central electrode by a porcelain insulator.
40
Solid fuel fabricated into various small shapes, which are assembled to form fuel elements, is in the form of
Discuss
Answer & Solution
Answer: Option D
Solution:
Solid fuel fabricated into various small shapes, which are assembled to form fuel elements, is in the form of Plates,Pallets,Pins