Combined Cycle Power Generation MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Combined Cycle Power Generation, 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 Combined Cycle Power Generation 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 Combined Cycle Power Generation mcq questions that explore various aspects of Combined Cycle Power Generation problems. Each MCQ is crafted to challenge your understanding of Combined Cycle Power Generation 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 Combined Cycle Power Generation 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 Combined Cycle Power Generation. 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 Combined Cycle Power Generation knowledge to the test? Let's get started with our carefully curated MCQs!

Combined Cycle Power Generation MCQs | Page 2 of 8

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Q11.
The engines which are operating on gas power cycle are?

a.

cyclic

b.

non-cyclic

c.

either cyclic or non-cyclic

d.

none of the mentioned

Discuss
Answer: (c).either cyclic or non-cyclic
Q12.
Rankine cycle efficiency of a good steam power plant may be in the range of ___________

a.

15 to 20%

b.

35 to 45%

c.

70 to 80%

d.

90 to 95%

Discuss
Answer: (b).35 to 45%
Q13.
In Rankine cycle the work output from the turbine is given by ___________

a.

change of internal energy between inlet and outlet

b.

change of enthalpy between inlet and outlet

c.

change of entropy between inlet and outlet

d.

change of temperature between inlet and outlet

Discuss
Answer: (b).change of enthalpy between inlet and outlet
Q14.
Regenerative heating i.e., bleeding steam to reheat feed water to boiler ___________

a.

decreases thermal efficiency of the cycle

b.

increases thermal efficiency of the cycle

c.

does not affect thermal efficiency of the cycle

d.

may increase or decrease thermal efficiency of the cycle depending upon the point of extraction of steam

Discuss
Answer: (b).increases thermal efficiency of the cycle
Q15.
Regenerative cycle thermal efficiency ___________

a.

is always greater than simple Rankine thermal efficiency

b.

is greater than simple Rankine cycle thermal efficiency only when steam is bled at particular pressure

c.

is same as simple Rankine cycle thermal efficiency

d.

is always less than simple Rankine cycle thermal efficiency

Discuss
Answer: (a).is always greater than simple Rankine thermal efficiency
Q16.
In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating ___________

a.

decreases with increase in Rankine cycle efficiency

b.

increases with increase in Rankine cycle efficiency

c.

is unaffected by increase in Rankine cycle efficiency

d.

none of the mentioned

Discuss
Answer: (b).increases with increase in Rankine cycle efficiency
Q17.
In a regenerative feed heating cycle, the greatest economy is affected ___________

a.

when steam is extracted from only one suitable point of steam turbine

b.

when steam is extracted from several places in different stages of steam turbine

c.

when steam is extracted only from the last stage of steam turbine

d.

when steam is extracted only from the first stage of steam turbine

Discuss
Answer: (b).when steam is extracted from several places in different stages of steam turbine
Q18.
What is the maximum percentage gain in Regenerative feed heating cycle thermal efficiency?

a.

increases with number of feed heaters increasing

b.

decreases with number of feed heaters increasing

c.

remains same unaffected by number of feed heaters

d.

none of the mentioned

Discuss
Answer: (a).increases with number of feed heaters increasing
Q19.
How can we differentiate Rankine cycle from Carnot cycle?

a.

Heat addition process of Rankine cycle is reversible isothermal whereas heat addition process of Carnot cycle is reversible isobaric

b.

Heat addition process of Rankine cycle is reversible isobaric whereas heat addition process of Carnot cycle is reversible isothermal

c.

Heat addition process of Rankine cycle is reversible isentropic whereas heat addition process of Carnot cycle is reversible isothermal

d.

Both cycles are identical except the working fluid used

Discuss
Answer: (b).Heat addition process of Rankine cycle is reversible isobaric whereas heat addition process of Carnot cycle is reversible isothermal
Q20.
What is the relation between efficiencies of Rankine cycle and Carnot cycle for the same pressure ratio?

a.

(ηr) = (ηc)

b.

(ηr) > (ηc)

c.

(ηr) < (ηc)

d.

none of the mentioned

Discuss
Answer: (c).(ηr) < (ηc)
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