Diesel Engine and Gas Turbine Power Plants MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Diesel Engine and Gas Turbine Power Plants, a fundamental topic in the field of Power Plant Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Diesel Engine and Gas Turbine Power Plants MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Diesel Engine and Gas Turbine Power Plants mcq questions that explore various aspects of Diesel Engine and Gas Turbine Power Plants problems. Each MCQ is crafted to challenge your understanding of Diesel Engine and Gas Turbine Power Plants principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Power Plant Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Diesel Engine and Gas Turbine Power Plants MCQs are your pathway to success in mastering this essential Power Plant Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Diesel Engine and Gas Turbine Power Plants. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Diesel Engine and Gas Turbine Power Plants knowledge to the test? Let's get started with our carefully curated MCQs!

Diesel Engine and Gas Turbine Power Plants MCQs | Page 3 of 5

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Q21.
In a four stroke cycle petrol engine, the charge is ignited at __________

a.

30° after bottom dead centre

b.

30° before bottom dead centre

c.

30° after top dead centre

d.

30° before top dead centre

Discuss
Answer: (d).30° before top dead centre
Q22.
The exhaust valve in a four stroke cycle petrol engine __________

a.

opens at 50° after bottom dead centre and closes at 15° before top dead centre

b.

opens at 50° before bottom dead centre and closes at 15° after top dead centre

c.

opens at bottom dead centre and closes at top dead centre

d.

may open and close anywhere

Discuss
Answer: (b).opens at 50° before bottom dead centre and closes at 15° after top dead centre
Q23.
The brake power of a diesel engine, keeping other parameters constant, can be increased by __________

a.

increasing the pressure of intake air

b.

decreasing the density of intake air

c.

decreasing the pressure of intake air

d.

increasing the temperature of intake air

Discuss
Answer: (a).increasing the pressure of intake air
Q24.
In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the __________

a.

end of suction stroke

b.

beginning of exhaust stroke

c.

beginning of suction stroke

d.

end of exhaust stroke

Discuss
Answer: (c).beginning of suction stroke
Q25.
The effective inhibitor of pre-ignition is __________

a.

alcohol

b.

lead

c.

water

d.

none of the mentioned

Discuss
Answer: (c).water
Q26.
The reference fuels for knock rating of spark ignition engines would include __________

a.

normal octane and aniline

b.

iso-octane and normal hexane

c.

iso-octane and alpha-methyl naphthalene

d.

normal heptane and iso-octane

Discuss
Answer: (d).normal heptane and iso-octane
Q27.
What is the purpose of testing an internal combustion engine?

a.

to conform the data used in design, the validity of which may be doubtful

b.

to satisfy the customer regarding the performance of the engine

c.

to determine the information, which cannot be obtained by calculations

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q28.
Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to __________

a.

overheated spark plug points

b.

red hot carbon deposits on cylinder walls

c.

cylinder walls being too hot

d.

any of the mentioned

Discuss
Answer: (d).any of the mentioned
Q29.
The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be __________

a.

20%

b.

25%

c.

50%

d.

55%

Discuss
Answer: (c).50%
Q30.
The fuels in order of decreasing knock tendency for spark ignition engines are __________

a.

Paraffin, aromatic, napthene

b.

Paraffin, napthene, aromatic

c.

Napthene, aromatics, paraffin

d.

Napthene, paraffin, aromatic

Discuss
Answer: (b).Paraffin, napthene, aromatic
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