Engineering Thermodynamics (3131905) MCQs

MCQs of Second Law of Thermodynamics

Showing 21 to 27 out of 27 Questions
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21.

The isothermal and adiabatic processes are regarded as

(a)

reversible process
(b)

irreversible process
(c)

reversible or irreversible process
(d)

none of these
Answer:

Option (a)

22.

Which one of the following is an example of a reversible process?

(a)

combustion
(b)

compression of spring
(c)

throttling process
(d)

diffusion of gases
Answer:

Option (b)

23.

COP of heat pump, when working fluid absorbs Q2 amount of heat and rejects Q1 amount of heat

(a)

Q1Q1-Q2

(b)

Q2Q1-Q2

(c)

Q1-Q2Q1

(d)

Q1-Q2Q2

Answer:

Option (a)

24.

COP of refrigerator, when refrigerant absorbs Q2 amount of heat and rejects Q1 amount of heat

(a)

Q1Q1-Q2

(b)

Q2Q1-Q2

(c)

Q1-Q2Q1

(d)

Q1-Q2Q2

Answer:

Option (b)

25.

Which of the following is not correct?

(a)

A thermodynamic temperature scale independent of the property of a working substance
(b)

Absolute Kelvin scale is t0C+273
(c)

Negative absolute temperature scale is not possible
(d)

None of these
Answer:

Option (d)

26.

A thermodynamic temperature scale is 

(a)

depend on property of working substance
(b)

independent on property of working substance
(c)

based on irreversible heat engine
(d)

all of these
Answer:

Option (b)

27.

A device that violates the second law of thermodynamics is called a

(a)

Perpetual Motion Machine of the second kind
(b)

Perpetual Motion Machine of the first kind
(c)

Perpetual Motion Machine of the third kind
(d)

None of these
Answer:

Option (a)

Showing 21 to 27 out of 27 Questions
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