Explore topic-wise MCQs in Thermodynamics.

This section includes 13 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 infinitesimal change in entropy dS due to reversible heat transfer dQ at temperature T is dS=dQ/T.

A. true
B. false
Answer» B. false
2.

For quasi-static, adiabatic path

A. Adx+Bdy+Cdz=TdS
B. Adx+Bdy+Cdz=1
C. Adx+Bdy+Cdz=0
D. none of the mentioned
Answer» B. Adx+Bdy+Cdz=1
3.

For adiabatic, reversible transition,

A. Adx+Bdy+Cdz=-1
B. Adx+Bdy+Cdz=1
C. Adx+Bdy+Cdz=0
D. none of the mentioned
Answer» D. none of the mentioned
4.

The area under the curve ∫TdS is equal to the

A. work done
B. heat transferred
C. internal energy change
D. none of the mentioned
Answer» C. internal energy change
5.

FOR_QUASI-STATIC,_ADIABATIC_PATH?$

A. Adx+Bdy+Cdz=TdS
B. Adx+Bdy+Cdz=1
C. Adx+Bdy+Cdz=0
D. none of the mentioned
Answer» B. Adx+Bdy+Cdz=1
6.

The_infinitesimal_change_in_entropy_dS_due_to_reversible_heat_transfer_dQ_at_temperature_T_is_dS=dQ/T.$

A. true
B. false
Answer» B. false
7.

For adiabatic, reversible transition?

A. Adx+Bdy+Cdz=-1
B. Adx+Bdy+Cdz=1
C. Adx+Bdy+Cdz=0
D. none of the mentioned
Answer» D. none of the mentioned
8.

According to the principle of Caratheodory, the first law in differential form is written as dQ=Adx+Bdy+Cdz.

A. true
B. false
Answer» B. false
9.

Net work in a Carnot cycle is given by (T1=temperature of heat addition and T2=temperature of heat rejection)

A. (T2-T1)(S1-S4)
B. (T1-T2)(S1-S4)
C. (T1-T2)(S4-S1)
D. none of the mentioned
Answer» C. (T1-T2)(S4-S1)
10.

A Carnot cycle has following processes.

A. 4 reversible isotherms
B. 4 reversible adiabatics
C. 2 reversible isotherms and 2 reversible adiabatics
D. none of the mentioned
Answer» D. none of the mentioned
11.

The area under the curve ‚à´TdS is equal to the$

A. work done
B. heat transferred
C. internal energy change
D. none of the mentioned
Answer» C. internal energy change
12.

A reversible adiabatic process is an isentropic process.

A. true
B. false
Answer» B. false
13.

For a reversible heat transfer and process being adiabatic, which of the following is true?

A. dQ=0
B. dS=0
C. S=constant
D. all of the mentioned
Answer» E.