20 + Mcqs in Quality Energy Page 1 McqOptions

1.	If two bodies were allowed to reach thermal equilibrium, one by heat conduction and other by operating a Carnot engine between them and extracting work, the final equilibrium temperatures would be different.
A.	this is because of the lower value of the total internal energy
B.	this is because of the higher value of the total internal energy
C.	both of the mentioned
D.	none of the mentioned
Answer» B. this is because of the higher value of the total internal energy

Discussion

2.	The ___ in entropy in an irreversible change is a measure of the extent to which energy ___ in that change.
A.	decrease, degrades
B.	increase, degrades
C.	increase, increases
D.	decrease, increases
Answer» C. increase, increases

Discussion

3.	When a gas is throttled adiabatically from a high to a low pressure,
A.	the enthalpy remains same
B.	there is degradation of energy
C.	both of the mentioned
D.	none of the mentioned
Answer» D. none of the mentioned

Discussion

4.	If the first law is the conservation of energy, then the second law is called the law of degradation of energy.
A.	true
B.	false
Answer» B. false

Discussion

5.	At ambient temperature, exergy of the fluid is
A.	neagtive
B.	positive
C.	infinity
D.	zero
Answer» E.

Discussion

6.	The available energy of a system ___ as its temperature or pressure decreases and approaches that of the surroundings.
A.	increases
B.	decreases
C.	remains constant
D.	none of the mentioned
Answer» C. remains constant

Discussion

7.	The exergy of a fluid at a higher temperature is ___ than that at a lower temperature and ___ as the temperature decreases.
A.	less, increases
B.	more, increases
C.	more, decreases
D.	less, decreases
Answer» D. less, decreases

Discussion

8.	When a gas is throttled adiabatically from a high to a low pressure,$
A.	the enthalpy remains same
B.	there is degradation of energy
C.	both of the mentioned
D.	none of the mentioned
Answer» D. none of the mentioned

Discussion

9.	If_the_first_law_is_the_conservation_of_energy,_then_the_second_law_is_called_the_law_of_degradation_of$
A.
B.	true
Answer» B. true

Discussion

10.	Adequate insulation is not that important for low temperature fluids.
A.	true
B.	false
Answer» B. false

Discussion

11.	If two bodies were allowed to reach thermal equilibrium, one by heat conduction and other by operating a Carnot engine between them and extracting work, the final equilibrium temperatures would
A.
B.	this is because of the lower value of the total internal energy
C.	this is because of the higher value of the total internal energy
Answer» B. this is because of the lower value of the total internal energy

Discussion

12.	The_____in_entropy_in_an_irreversible_change_is_a_measure_of_the_extent_to_which_energy_____in_that
A.
B.	decrease, degrades
C.	increase, degrades
Answer» C. increase, degrades

Discussion

13.	At ambient temperature, exergy of the fluid i?
A.	neagtive
B.	positive
C.	infinity
D.	zero
Answer» E.

Discussion

14.	The available energy of a system ___ as its temperature or pressure decreases and approaches that of
A.
B.	increases
C.	decreases
Answer» C. decreases

Discussion

15.	The second law affixes a quality to energy of a system at any state.
A.	true
B.	false
Answer» B. false

Discussion

16.	The exergy of a fluid at a higher temperature is ___ than that at a lower temperature and ___ as the
A.
B.	less, increases
C.	more, increases
Answer» D.

Discussion

17.	The loss of exergy is more when,
A.	the heat loss occurs at a higher temperature
B.	the heat loss occurs at a lower temperature
C.	depends on the process
D.	none of the mentioned
Answer» B. the heat loss occurs at a lower temperature

Discussion

18.	Adequate insulation must be provided for high temperature fluids.
A.	true
B.	false
Answer» B. false

Discussion

19.	For an infinitesimal reversible process at constant pressure,
A.	dS=m*dT/T
B.	dS=Cp*dT/T
C.	dS=m*dT/T
D.	dS=mCpdT/T
Answer» E.

Discussion

20.	A hot gas flowing through a pipeline can be considered as a
A.	reversible process
B.	irreversible process
C.	both of the mentioned
D.	none of the mentioned
Answer» C. both of the mentioned

Discussion

Explore topic-wise MCQs in Thermodynamics.

If two bodies were allowed to reach thermal equilibrium, one by heat conduction and other by operating a Carnot engine between them and extracting work, the final equilibrium temperatures would be different.

The _ in entropy in an irreversible change is a measure of the extent to which energy _ in that change.

When a gas is throttled adiabatically from a high to a low pressure,

If the first law is the conservation of energy, then the second law is called the law of degradation of energy.

At ambient temperature, exergy of the fluid is

The available energy of a system ___ as its temperature or pressure decreases and approaches that of the surroundings.

The exergy of a fluid at a higher temperature is _ than that at a lower temperature and _ as the temperature decreases.

When a gas is throttled adiabatically from a high to a low pressure,$

If_the_first_law_is_the_conservation_of_energy,_then_the_second_law_is_called_the_law_of_degradation_of$

Adequate insulation is not that important for low temperature fluids.

If two bodies were allowed to reach thermal equilibrium, one by heat conduction and other by operating a Carnot engine between them and extracting work, the final equilibrium temperatures would

The_____in_entropy_in_an_irreversible_change_is_a_measure_of_the_extent_to_which_energy_____in_that

At ambient temperature, exergy of the fluid i?

The available energy of a system ___ as its temperature or pressure decreases and approaches that of

The second law affixes a quality to energy of a system at any state.

The exergy of a fluid at a higher temperature is _ than that at a lower temperature and _ as the

The loss of exergy is more when,

Adequate insulation must be provided for high temperature fluids.

For an infinitesimal reversible process at constant pressure,

A hot gas flowing through a pipeline can be considered as a

Explore topic-wise MCQs in Thermodynamics.

If two bodies were allowed to reach thermal equilibrium, one by heat conduction and other by operating a Carnot engine between them and extracting work, the final equilibrium temperatures would be different.

The ___ in entropy in an irreversible change is a measure of the extent to which energy ___ in that change.

When a gas is throttled adiabatically from a high to a low pressure,

If the first law is the conservation of energy, then the second law is called the law of degradation of energy.

At ambient temperature, exergy of the fluid is

The available energy of a system ___ as its temperature or pressure decreases and approaches that of the surroundings.

The exergy of a fluid at a higher temperature is ___ than that at a lower temperature and ___ as the temperature decreases.

When a gas is throttled adiabatically from a high to a low pressure,$

If_the_first_law_is_the_conservation_of_energy,_then_the_second_law_is_called_the_law_of_degradation_of$

Adequate insulation is not that important for low temperature fluids.

If two bodies were allowed to reach thermal equilibrium, one by heat conduction and other by operating a Carnot engine between them and extracting work, the final equilibrium temperatures would

The_____in_entropy_in_an_irreversible_change_is_a_measure_of_the_extent_to_which_energy_____in_that

At ambient temperature, exergy of the fluid i?

The available energy of a system ___ as its temperature or pressure decreases and approaches that of

The second law affixes a quality to energy of a system at any state.

The exergy of a fluid at a higher temperature is ___ than that at a lower temperature and ___ as the

The loss of exergy is more when,

Adequate insulation must be provided for high temperature fluids.

For an infinitesimal reversible process at constant pressure,

A hot gas flowing through a pipeline can be considered as a

The _ in entropy in an irreversible change is a measure of the extent to which energy _ in that change.

The exergy of a fluid at a higher temperature is _ than that at a lower temperature and _ as the temperature decreases.

The exergy of a fluid at a higher temperature is _ than that at a lower temperature and _ as the