Basic Thermodynamic Cycles MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Basic Thermodynamic Cycles, 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 Basic Thermodynamic Cycles 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 Basic Thermodynamic Cycles mcq questions that explore various aspects of Basic Thermodynamic Cycles problems. Each MCQ is crafted to challenge your understanding of Basic Thermodynamic Cycles 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 Basic Thermodynamic Cycles MCQs are your pathway to success in mastering this essential Power Plant Engineering topic.

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Basic Thermodynamic Cycles MCQs | Page 2 of 4

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Q11.
If p and q are the efficiencies of a Brayton & Rankine cycles respectively in a Brayton-Rankine combined plant, the efficiency n of a combined plant is?

a.

n = p/q

b.

n = p+q-pq

c.

n = pq

d.

n = (1 – pq)

Discuss
Answer: (b).n = p+q-pq
Q12.
Which of these is a working fluid in the topping plant of a Brayton-Rankine combined plant?

a.

Hydrogen

b.

Helium

c.

Nitrogen

d.

All of the mentioned

Discuss
Answer: (b).Helium
Q13.
Which of these is a working fluid in the bottoming plant of a Brayton-Rankine combined plant?

a.

Mercury

b.

Steam

c.

Water

d.

Air

Discuss
Answer: (c).Water
Q14.
What would be the temperature of the gas in the combustion chamber?

a.

500 °C

b.

1600 °C

c.

1200 °C

d.

650 °C

Discuss
Answer: (b).1600 °C
Q15.
The efficiency of the open cycle gas plant is quite low. Why?

a.

Gas gets cooled before reaching the turbine wheels

b.

A lot of mechanical energy is used up by the compressor

c.

Due to the presence of regenerator and absence of air pre heater

d.

Both Gas gets cooled before reaching the turbine wheels and a lot of mechanical energy is used up by the compressor

Discuss
Answer: (d).Both Gas gets cooled before reaching the turbine wheels and a lot of mechanical energy is used up by the compressor
Q16.
To improve the efficiency of the gas turbines, which among these are used?

a.

Regenerator

b.

Inter cooling

c.

Reheating

d.

All of the mentioned

Discuss
Answer: (d).All of the mentioned
Q17.
What is regeneration?

a.

Removal of heat from compressed air between stages of compression

b.

Transfer of heat energy from exhaust gases to the compressed air flowing between compressor and the combustion chamber

c.

To increase the temperature of partially expanded gases by burning more fuel

d.

Transfer of heat energy from exhaust gases to the compressed air flowing between compressor and the combustion chamber and increases the temperature of partially expanded gases by burning more fuel

Discuss
Answer: (b).Transfer of heat energy from exhaust gases to the compressed air flowing between compressor and the combustion chamber
Q18.
What is meant by inter cooling?

a.

Removal of heat from compressed air between stages of compression

b.

Transfer of heat energy from exhaust gases to the compressed air flowing between compressor and the combustion chamber

c.

To increase the temperature of partially expanded gases by burning more fuel

d.

None of the mentioned

Discuss
Answer: (a).Removal of heat from compressed air between stages of compression
Q19.
Which material is used for the manufacture of the turbine blades?

a.

Stainless steel

b.

Carbon steel

c.

High nickel alloy

d.

High alloy steel

Discuss
Answer: (c).High nickel alloy
Q20.
In the Brayton Rankine combined plant in series, the efficiency of the bottoming plant is?

a.

a product of two efficiencies

b.

a sum of two efficiencies

c.

difference of two efficiencies

d.

none of the mentioned

Discuss
Answer: (a).a product of two efficiencies
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