Explore topic-wise MCQs in Thermodynamics.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

A heat engine receives 6 kW from a source at 250°C and rejects heat at 30°C with W. = 0 kW. Does this satisfy the inequality of Clausius?

A. yes
B. no
C. cannot be said
D. none of the mentioned
Answer» C. cannot be said
Discussion
2.

If dQ is the heat supplied at T and dQ2 is the heat rejected at T2, then efficiency is given by

A. 1-(dQ2/dQ)
B. 1-(dQ/dQ2)
C. (dQ/dQ2)-1
D. (dQ2/dQ)-1
Answer» B. 1-(dQ/dQ2)
Discussion
3.

If the cyclic integral of dQ/T is greater than zero then the cycle is

A. irreversible but not possible
B. irreversible but possible
C. impossible
D. reversible
Answer» D. reversible
Discussion
4.

If the cyclic integral of dQ/T is less than zero then the cycle is

A. irreversible but not possible
B. irreversible and possible
C. impossible
D. reversible
Answer» C. impossible
Discussion
5.

According to the Clausius’ theorem, the cyclic integral of ____ for a reversible cycle is zero.

A. dW/dT
B. dH/dT
C. dQ/dT
D. dE/dT
Answer» D. dE/dT
Discussion
6.

IF_DQ_IS_THE_HEAT_SUPPLIED_AT_T_AND_DQ2_IS_THE_HEAT_REJECTED_AT_T2,_THEN_EFFICIENCY_IS_GIVEN_BY?$

A. 1-(dQ2/dQ)
B. 1-(dQ/dQ2)
C. (dQ/dQ2)-1
D. (dQ2/dQ)-1
Answer» B. 1-(dQ/dQ2)
Discussion
7.

IF_THE_CYCLIC_INTEGRAL_OF_DQ/T_IS_GREATER_THAN_ZERO_THEN_THE_CYCLE_IS?$

A. irreversible but not possible
B. irreversible but possible
C. impossible
D. reversible
Answer» D. reversible
Discussion
8.

A heat engine receives 6 kW from a source at 250°C and rejects heat at 30°C with W. = 0 kW. Does this satisfy the inequality of Clausius?$#

A. yes
B. no
C. cannot be said
D. none of the mentioned
Answer» B. no
Discussion
9.

If the cyclic integral of dQ/T is less than zero then the cycle i?

A. irreversible but not possible
B. irreversible and possible
C. impossible
D. reversible
Answer» C. impossible
Discussion
10.

If the cyclic integral of dQ/T is zero then the cycle is

A. irreversible but not possible
B. irreversible but possible
C. impossible
D. reversible
Answer» E.
Discussion
11.

Which of the following is known as the inequality of Clausius?

A. cyclic integral of dQ/T<=0
B. cyclic integral of dQ/T>=0
C. cyclic integral of dW/T<=0
D. cyclic integral of dW/T>=0
Answer» B. cyclic integral of dQ/T>=0
Discussion
12.

The cyclic integral of entropy is____

A. one
B. zero
C. infinity
D. cannot be determined
Answer» C. infinity
Discussion
13.

The efficiency of a general cycle will be _____ the efficiency of a reversible cycle.

A. equal to
B. less than
C. equal to or greater than
D. equal to or less than
Answer» E.
Discussion
14.

Two reversible adiabatic paths can intersect each other.

A. true
B. false
Answer» C.
Discussion
15.

According to the Clausius’ theorem, the cyclic integral of ____ for a reversible cycle is zero.$

A. dW/dT
B. dH/dT
C. dQ/dT
D. dE/dT
Answer» D. dE/dT
Discussion
16.

Any reversible path can be substituted by a reversible zigzag path between the same states.

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