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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-3

Each section contains 100 MCQs on Internal Combustion Engines (I.C. Engines) .
11
The maximum temperature in the I.C. engine cylinder is of the order of
Discuss
Answer & Solution
Answer: Option D
Solution:
The maximum temperature in the I.C. engine cylinder is of the order of 2000°C - 2500°C.
12
For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of
Discuss
Answer & Solution
Answer: Option B
Solution:
For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of 12 : 1
13
The theoretically correct air fuel ratio for petrol engine is of the order of
Discuss
Answer & Solution
Answer: Option D
Solution:
The theoretically correct air fuel ratio for petrol engine is of the order of 15 : 1
14
In petrol engines, the delay period is of the order of
Discuss
Answer & Solution
Answer: Option B
Solution:
In petrol engines, the delay period is of the order of 0.002 second
15
The inlet value of a four stroke cycle I.C engine remains open for nearly
Discuss
Answer & Solution
Answer: Option C
Solution:
The inlet value of a four stroke cycle I.C engine remains open for nearly 235°
16
As a result of detonation in an I.C. engine, following parameter attains very high value
Discuss
Answer & Solution
Answer: Option B
Solution:
As a result of detonation in an I.C. engine, following parameter attains very high value Rate of rise of pressure
17
A higher compression ratio causes
Discuss
Answer & Solution
Answer: Option D
Solution:
A higher compression ratio causes
-Pre-ignition
-Increase in detonation
-Acceleration in the rate of combustion
18
In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.
Discuss
Answer & Solution
Answer: Option B
Solution:
In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is below the atmospheric pressure.
19
The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to
Discuss
Answer & Solution
Answer: Option D
Solution:
The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to
- Inject fuel in a chamber of high pressure at the end of compression stroke
- Inject fuel at a high velocity to facilitate atomization
- Ensure that penetration is not high
20
All heat engines utilize
Discuss
Answer & Solution
Answer: Option A
Solution:
All heat engines utilize Low heat value of oil. In thermodynamics and engineering, a 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.