Engineering Thermodynamics (3131905) MCQs

MCQs of Entropy

Showing 1 to 10 out of 22 Questions
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1.

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

(a)

reversible
(b)

irreversible
(c)

impossible
(d)

all of these
Answer:

Option (a)

2.

The Clausius inequality is given by

(a)

∮δQT=0
(b)

∮δQT>0
(c)

∮δQT≤0
(d)

∮δQT≥0
Answer:

Option (c)

3.

According to an increase in the entropy principle, the net entropy change is given by

(a)

dSnet⩾0
(b)

dSnet≤0
(c)

dSnet<0
(d)

None of these
Answer:

Option (a)

4.

The entropy is the

(a)

point function
(b)

path function
(c)

property of system
(d)

both point function and property of a system
Answer:

Option (d)

5.

Which of the following statement is correct?

(a)

The increase in entropy is obtained from a given quantity of heat at a low temperature
(b)

The change in entropy may be regarded as a measure of the rate of the availability or unavailability of heat for transformation into work
(c)

The entropy represents the maximum amount of work obtainable per degree drop in temperature
(d)

All of these
Answer:

Option (d)

6.

The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner is known as

(a)

enthalpy
(b)

internal energy
(c)

entropy
(d)

external energy
Answer:

Option (c)

7.

The Clausius theorem is only applied to 

(a)

reversible cycle
(b)

irreversible cycle
(c)

impossible cycle
(d)

all of these
Answer:

Option (a)

8.

The entropy generation during a process always

(a)

positive
(b)

negative
(c)

remains constant
(d)

may positive or negative depend on heat transfer
Answer:

Option (a)

9.

The second law of thermodynamics defines

(a)

heat
(b)

work
(c)

internal energy
(d)

entropy
Answer:

Option (d)

10.

For a reversible adiabatic process, the change in entropy is

(a)

zero
(b)

maximum
(c)

minimum
(d)

infinite
Answer:

Option (a)

Showing 1 to 10 out of 22 Questions
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