THERMODYNAMIC PROCESSES MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS
THERMODYNAMIC PROCESSES
MULTIPLE CHOICE QUESTIONS
(MCQ) WITH ANSWERS
MCQ increases understanding and
clarity. It helps in using the concepts
in real life applications.
1. A vapor becomes a gas as long as degree of super heat is

Firstly < 20^{0}C

Secondly < 50^{0}C

Thirdly <40^{0}C

None
Ans: (iv)
2. Which of the following degree of super heat makes a vapor a gas

Firstly = 10^{0}C

Secondly = 50^{0}C

Thirdly =15^{0}C

None
Ans: (iv)
4. Mathematical form of isothermal process is

Firstly pv^{n} = C

Secondly pv^{γ} = C

Thirdly Pv^{3} =C

None
Ans: (iv)
5. Equation of an isothermal process is

First equation pv^{γ} = C

Second pv^{n} = C

Third Pv =C

None
Ans: (iii)
6. Mathematic expression for an adiabatic process is

Firstly P v =C

Secondly p v^{n} = C

Thirdly pv^{γ} = C

None
Ans: (iii)
7. Equation of an isentropic process is

First equation pv^{n} = C

Second equation pv^{γ} = C

Third equation Pv =C

None
Ans: (ii)
8. Mathematic expression for isobaric process is

One form pv^{n} = C

Second form pv^{γ} = C

Third form pv =C

None
Ans: (iv)
9. An isobaric process is

Firstly p/v^{n} = C

Secondly p/v^{γ} = C

Thirdly V/T =C

None
Ans: (iii)
10. Equation for a constant volume process is

First form p/v^{γ} = C

Second form p/v^{n} = C

Third form V/T =C

None
Ans: (iv)
11. Mathematic expression for a constant volume process is

Firstly V/T =C

Secondly p/v^{n} = C

Thirdly p/v^{γ} = C

None
Ans: (iii)
12. Perfect gas equation is

First form pv=R_{g}T

Second form pv = mR_{g}T

Third form pv=nR_{g}T

None
Ans: (i)
13. The expression for the perfect gas equation is

Firstly pV =nR_{g}T

Secondly pV=R_{g}T

Thirdly pV = mR_{g}T

None
Ans: (iii)
14. Equation of perfect gas is

First form pV=mR_{U}T

Second form pV = R_{U}T

Third form pV=nR_{U}T

None
Ans: (i)
15. Real gas equation is

Firstly pV=nR_{U}T

Secondly pV = mR_{U}T

Thirdly pV=R_{U}T

None
Ans: (iv)

The internal energy of a gas is a function of

First form T, p and V

Second form T and V

Third form T and p

None
Ans: (iv)
17. Gas internal energy is a function of

T

V

p

None
Ans: (i)
18. The molar volume is

Firstly 22.41 m^{3}/kg at N.T.P.

Secondly 22.41 m^{3}/kg bar at N.T.P.

Thirdly 22.41 m^{3}/kg mole at N.T.P.

None
Ans: (iii)
19. Equation of a polytropic process is

First form (pV)^{n}=C

Second form pV^{n} = C

Third form pv^{γ} = C

None
Ans: (ii)
20. What are standard temperature and pressure conditions?

Firstly 0 K and 760 mm of Hg

Secondly 0 K and 1 mm of Hg

Thirdly 0^{0}C and 1 mm of Hg

None
Ans(iv)
21. Standard temperature and pressure conditions are

First way 0 K and 760 mm of Hg

Second way 0^{0}C and 760 mm of Hg

Third way 0^{0}C and 1 mm of Hg

None
Ans(ii)
22. Normal temperature and pressure conditions are

Firstly 0 K and 760 mm of Hg

Secondly 0^{0}C and 760 mm of Hg

Thirdly 0^{0}C and 1 mm of Hg

None
Ans(iv)
23. Values of normal temperature and pressure are

First form 0 K and 760 mm of Hg

Second form 0^{0}C and 760 mm of Hg

Third form 20^{0}C and 760 mm of Hg

None
Ans(ii)
24. State the normal temperature and pressure conditions

Firstly 0 K and 760 mm of Hg

Secondly 0^{0}C and 760 mm of Hg

Thirdly 0^{0}C and 1 mm of Hg

None
Ans(iv)
25. Identify normal temperature and pressure conditions

First 0 K and 760 mm of Hg

Second 0^{0}C and 760 mm of Hg

Third 20^{0}C and 760 mm of Hg

None
Ans:(iii)
26. Estimate the pressure at constant temperature when the volume becomes three times?

Firstly Pressure becomes three times

Secondly Pressure becomes one third

Thirdly Pressure remains the same

None
Ans:(ii)
27. Throttling expansion process occurs at constant
(i) Temperature
(ii) pressure
(iii) Internal energy
(iv) None
ANS: (iv)
28. Throttling expansion process occurs at constant
(i) Volume
(ii) pressure & temperature
(iii) Enthalpy
(iv) None
ANS: (iii)
29. In a throttling expansion process, work done is
(i) Negative
(ii) Zero
(iii) Positive
(iv) None
ANS: (ii)
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