Explore topic-wise MCQs in Thermodynamics.

This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

The heating of feedwater by steam bled from the turbine, carnotizes the Rankine cycle.

A. true
B. false
Answer» B. false
Discussion
2.

The efficiency of regenerative cycle will be ____ the efficiency of the Rankine cycle.

A. greater than
B. equal to
C. less than
D. none of the mentioned
Answer» B. equal to
Discussion
3.

THE_HEATING_OF_FEEDWATER_BY_STEAM_BLED_FROM_THE_TURBINE,_CARNOTIZES_THE_RANKINE_CYCLE.?$

A. true
B. false
Answer» B. false
Discussion
4.

Which of the following is an assumption for heaters?

A. they are adequately insulated
B. there is no heat gain from or heat loss to the surroundings
C. both of the mentioned
D. none of the mentioned
Answer» D. none of the mentioned
Discussion
5.

The efficiency of regenerative cycle will be ____ the efficiency of the Rankine cycle?

A. greater than
B. equal to
C. less than
D. none of the mentioned
Answer» B. equal to
Discussion
6.

For a regenerative cycle, which of the following is true?

A. efficiency = (Q1-Q2)/Q1
B. efficiency = (Wt-Wp)/Q1
C. steam rate = 3600/(Wt-Wp)
D. all of the mentioned
Answer» E.
Discussion
7.

The ideal regenerative cycle is not practicable because

A. reversible heat transfer can’t be obtained in finite time
B. heat exchanger in turbine is mechanically impracticable
C. there is high moisture content of steam in the turbine
D. all of the mentioned
Answer» E.
Discussion
8.

When compared with the Rankine cycle, the ideal regenerative cycle has

A. less net work output
B. more steam rate
C. more efficient
D. all of the mentioned
Answer» E.
Discussion
9.

The efficiency of an ideal regenerative cycle is ____ the Carnot cycle efficiency.

A. greater than
B. equal to
C. less than
D. none of the mentioned
Answer» C. less than
Discussion
10.

The efficiency of an ideal regenerative cycle is given by

A. 1 – (T1/T2)
B. 1 – (T2/T1)
C. 1 – (Q1/Q2)
D. none of the mentioned
Answer» C. 1 ‚Äö√Ñ√∂‚àö√ë‚àö¬® (Q1/Q2)
Discussion
11.

In the ideal regenerative cycle, the condensate after leaving the pump circulates around the turbine casing.

A. true
B. false
Answer» B. false
Discussion
12.

The mean temperature of heat addition can be increased by

A. increasing the amount of heat supplied at high temperatures
B. decreasing the amount of heat added at low temperatures
C. both of the mentioned
D. none of the mentioned
Answer» D. none of the mentioned
Discussion