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.
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
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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I need answers from 9-15

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

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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