Explore topic-wise MCQs in Thermodynamics.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

Polytropic specific heat is given by cn=cv(ɣ-n)/(1-n) .

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

For entropy change in a polytropic process, which of the following statement is true?

A. when n=ɣ, the entropy change becomes zero
B. if p2>p1, for n<=ɣ, the entropy of the gas decreases
C. for n>ɣ, the entropy of the gas increases
D. all of the mentioned
Answer» E.
Discussion
3.

In the equation p(v^n), n is calculated by

A. (logp1 + logp2) / (logv2 + logv1)
B. (logp1 – logp2) / (logv2 – logv1)
C. (logp1 – logp2) / (logv2 + logv1)
D. none of the mentioned
Answer» C. (logp1 – logp2) / (logv2 + logv1)
Discussion
4.

Which of the following is true for a polytropic process?

A. p(v^n) is used to describe the process
B. it is not adiabatic
C. it can be reversible
D. all of the mentioned
Answer» E.
Discussion
5.

For a reversible adiabatic process,

A. p*(v^ɣ) = constant
B. T*(v^(ɣ-1)) = constant
C. T*(p^(1-ɣ)/ɣ) = constant
D. all of the mentioned
Answer» E.
Discussion
6.

For a reversible adiabatic change, ds=0.

A. true
B. false
Answer» B. false
Discussion
7.

Which of the following equation can be used to compute the entropy change between any two states of an ideal gas?

A. s2-s1 = cv*ln(T2/T1) + R*ln(v2/v1)
B. s2-s1 = cp*ln(T2/T1) – R*ln(p2/p1)
C. s2-s1 = cp*ln(v2/v1) + cv*ln(p2/p1)
D. all of the mentioned
Answer» E.
Discussion
8.

The maximum and minimum values of ɣ is

A. 1.33, 1
B. 2.00, 1
C. 1.67, 1
D. 1.25, 1
Answer» D. 1.25, 1
Discussion
9.

The value of cp and cv depend on

A. temperature of the gas
B. ɣ and R
C. pressure of the gas
D. all of the mentioned
Answer» C. pressure of the gas
Discussion