Refrigeration & Air Conditioning Technology, 8e - 83

Unit 3 Refrigeration and Refrigerants

10. If the evaporating pressure was 76 psig for R-22 and the
compressor inlet temperature was 65°F, what would be
the total superheat entering the compressor?
A. 11°F
B. 21°F
C. 10°F
D. 20°F
11. Define the term subcooled liquid.
12. The condensing pressure is 260 psig and the condenser
outlet temperature is 108°F for R-22. By how many
degrees is the liquid subcooled in the condenser?
A. 12°F
B. 42°F
C. 7°F
D. 14°F
13. The condensing pressure is 260  psig and the metering
device inlet temperature is 100°F for R-22. What is the
total subcooling in this system?
A. 15°F
B. 20°F
C. 25°F
D. 30°F
14. What is meant by a saturated liquid and vapor?
15. What is meant by desuperheating a vapor?
16. What happens to the refrigerant in the condenser?
17. What happens to refrigerant heat in the condenser?
18. The metering device
A. cycles the compressor.
B. controls subcooling.
C. stores refrigerant.
D. meters refrigerant.

83

19. What is adiabatic expansion?
20. Describe flash gas, and tell how it affects system
capacity.
21. Quality means _______ when referring to a refrigerant.
22. Describe the difference between a reciprocating compressor and a rotary compressor.
23. List the cylinder color codes for R-12, R-22, R-502,
R-134a, R-11, R-401A, R-402B, R-410A, R-404A, and
R-407C.
24. Define enthalpy.
25. Define a pure compound refrigerant, and give two
examples.
26. Define net refrigeration effect as it applies to the refrigeration cycle.
27. Define heat of compression, and explain how it is
computed.
28. Define flash gas, and explain how it applies to the net
refrigeration effect of the refrigeration cycle.
29. Define temperature glide as it pertains to a refrigerant
blend.
30. Define a zeotropic refrigerant blend, and give an
example.
31. Define a near-azeotropic refrigerant blend, and give two
examples.



Refrigeration & Air Conditioning Technology, 8e

Table of Contents for the Digital Edition of Refrigeration & Air Conditioning Technology, 8e

Contents
Refrigeration & Air Conditioning Technology, 8e - Cover1
Refrigeration & Air Conditioning Technology, 8e - Cover2
Refrigeration & Air Conditioning Technology, 8e - i
Refrigeration & Air Conditioning Technology, 8e - ii
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Refrigeration & Air Conditioning Technology, 8e - Contents
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