Engineering Thermodynamics (3131905) MCQs

MCQs of Entropy

Showing 11 to 20 out of 22 Questions
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11.

The entropy __________ in an irreversible cyclic process.

(a)

remains constant
(b)

decreases
(c)

increases
(d)

all of these
Answer:

Option (c)

12.

The entropy of water at 0°C is assumed to be

(a)

1
(b)

0
(c)

-1
(d)

10
Answer:

Option (b)

13.

Entropy change depends on

(a)

heat transfer
(b)

mass transfer
(c)

Change of temperature
(d)

Thermodynamic state
Answer:

Option (a)

14.

The increase in entropy of a system represents

(a)

increase in availability of energy
(b)

increase in temperature
(c)

decrease in pressure
(d)

degradation of energy
Answer:

Option (d)

15.

The entropy change of the universe is always

(a)

zero
(b)

unity
(c)

increase 
(d)

decrease 
Answer:

Option (c)

16.

If the ∮ δQT > 0 then the heat engine cycle will be

(a)

irreversible
(b)

reversible
(c)

impossible
(d)

all of these
Answer:

Option (c)

17.

The entropy is 

(a)

intensive property
(b)

extensive property
(c)

path function
(d)

all of these
Answer:

Option (b)

18.

The unit of entropy is

(a)

kJ
(b)

kJ/kg
(c)

kJ/K
(d)

kg/kJ K
Answer:

Option (c)

19.

The entropy change for a closed system during heating of gas at constant pressure is

(a)

mCplnT2T1

(b)

mCvlnT2T1

(c)

mRlnV2V1

(d)

zero
Answer:

Option (a)

20.

The entropy change for a closed system during isothermal process is

(a)

mCplnT2T1

(b)

mCvlnT2T1

(c)

mRlnV2V1

(d)

zero
Answer:

Option (c)

Showing 11 to 20 out of 22 Questions
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