9. A solenoid valve that opens a small valve that directs pressure to open and close a larger valve is A. direct-acting B. normally closed C. pilot-operated D. All of the above. lation on an evaporator a 16.

Elements Of Electromagnetics
7th Edition
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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pressure to open and close a larger valve is
9. A solenoid valve that opens a small valve that directs
_is used to desuperheat hot-gas vapor from the
che evaporator
ate that the
16. The purpose
1
a
A. bypass
device
A. direct-acting
B. normally closed
C. pilot-operated
D. All of the above.
10. Ice accumulation on an evaporator can be
melted by automatically opening a system's
B. control
pressur
C. isolate
D. shut of
gets to
on the high side
quickly
A. hot-gas defrost valve
B. liquid receiver
C. manifold valve
17. Which of t
refrigerar
when the
D. moisture indicator
A. Fusibl
В. Mani-
C. Ruptr
D. Sprim
valve alleviates low pressure and
11. A
temperature conditions by diverting some refrigerant
vapor from the compressor discharge directly to the
low side.
stributor
A. desuperheater
B. hot-gas bypass
C. relief
18. Which o
valves is
A. A blo
D. riser
B. Relic
C. Reli
12. A hot-gas bypass valve directs hot-gas refrigerant
from the discharge line to the
usir
A. condenser
D. Spr
B. liquid line
C. liquid receiver
D. low side of the system
rding service
pre
19. A devi
g using
to a pr
13. A
refrige
ing pressure
discharge line.
A. condenser pressure regulator
B. crankcase pressure regulator
C. liquid injection valve
D. low-ambient control
when
A. cC
t the outlet of
B. cr
arned using a
C. re
D. sp
20. A de
14, The nurg
Lutor is to
Transcribed Image Text:pressure to open and close a larger valve is 9. A solenoid valve that opens a small valve that directs _is used to desuperheat hot-gas vapor from the che evaporator ate that the 16. The purpose 1 a A. bypass device A. direct-acting B. normally closed C. pilot-operated D. All of the above. 10. Ice accumulation on an evaporator can be melted by automatically opening a system's B. control pressur C. isolate D. shut of gets to on the high side quickly A. hot-gas defrost valve B. liquid receiver C. manifold valve 17. Which of t refrigerar when the D. moisture indicator A. Fusibl В. Mani- C. Ruptr D. Sprim valve alleviates low pressure and 11. A temperature conditions by diverting some refrigerant vapor from the compressor discharge directly to the low side. stributor A. desuperheater B. hot-gas bypass C. relief 18. Which o valves is A. A blo D. riser B. Relic C. Reli 12. A hot-gas bypass valve directs hot-gas refrigerant from the discharge line to the usir A. condenser D. Spr B. liquid line C. liquid receiver D. low side of the system rding service pre 19. A devi g using to a pr 13. A refrige ing pressure discharge line. A. condenser pressure regulator B. crankcase pressure regulator C. liquid injection valve D. low-ambient control when A. cC t the outlet of B. cr arned using a C. re D. sp 20. A de 14, The nurg Lutor is to
14. The purpose of a crankcase pressure regulator is to
C. liquid injection valve
D. low-ambient control
A. ensure that compressor discharge pressure is
sufficiently high
B. increase liquid line pressure in low-ambient
conditions
C. maintain a sufficiently low pressure in the
compressor
D. show the flow of liquid refrigerant
15. A commercial refrigeration system with a single
suction line and multiple evaporators can maintain
a different temperature at each evaporator by
controlling and differing
A. crankcase pressure
B. evaporator pressure
C. head
D. liquid line temperature
pressure
Transcribed Image Text:14. The purpose of a crankcase pressure regulator is to C. liquid injection valve D. low-ambient control A. ensure that compressor discharge pressure is sufficiently high B. increase liquid line pressure in low-ambient conditions C. maintain a sufficiently low pressure in the compressor D. show the flow of liquid refrigerant 15. A commercial refrigeration system with a single suction line and multiple evaporators can maintain a different temperature at each evaporator by controlling and differing A. crankcase pressure B. evaporator pressure C. head D. liquid line temperature pressure
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