Chapter 06 Quiz
Final Grade
Feedback will be available after submission
Correct answers will be available after all grades have been posted
SUBMITTED 4/20/26, 10:37 AM
RECEIPT: B80714A832C44CAEAC6E24641438D3C9
1 TRUE/FALSE
A cold canned drink is left in a warmer room and after a certain time its temperature rises as
a result of heat transfer. Since the heat transfer occurs very slowly, we can consider the
process reversible.
True
False
2 MULTIPLE CHOICE
The definition of COPHP is
A QH/QL-1
B 1-QL/QH
C 1/(1-QL/QH)
D 1/(QH/QL-1)
, 3 TRUE/FALSE
If T1 > T2 > T3, the COPR of a reversible system running with T1 and T2 will be lower than that
running with T1 and T3.
True
False
4 TRUE/FALSE
Even a well-designed irreversible refrigeration cycle cannot have a higher COP than a
reversible cycle (Assuming the thermal reservoirs are the same).
True
False
5 MULTIPLE CHOICE
Which one of the following will NOT directly lead to irreversibility?
A Heat transfer with a finite ∆T
B Unrestrained expansion
C Conversion between kinetic and potential energy
D Friction of the piston
Final Grade
Feedback will be available after submission
Correct answers will be available after all grades have been posted
SUBMITTED 4/20/26, 10:37 AM
RECEIPT: B80714A832C44CAEAC6E24641438D3C9
1 TRUE/FALSE
A cold canned drink is left in a warmer room and after a certain time its temperature rises as
a result of heat transfer. Since the heat transfer occurs very slowly, we can consider the
process reversible.
True
False
2 MULTIPLE CHOICE
The definition of COPHP is
A QH/QL-1
B 1-QL/QH
C 1/(1-QL/QH)
D 1/(QH/QL-1)
, 3 TRUE/FALSE
If T1 > T2 > T3, the COPR of a reversible system running with T1 and T2 will be lower than that
running with T1 and T3.
True
False
4 TRUE/FALSE
Even a well-designed irreversible refrigeration cycle cannot have a higher COP than a
reversible cycle (Assuming the thermal reservoirs are the same).
True
False
5 MULTIPLE CHOICE
Which one of the following will NOT directly lead to irreversibility?
A Heat transfer with a finite ∆T
B Unrestrained expansion
C Conversion between kinetic and potential energy
D Friction of the piston
