5-21.
The compressor operates in
accordance with which of the
following principles?
1. The pressure and temperature
of a given volume of confined
gas will increase if its
volume increases
2. If a given volume of gas is
trapped and the area in which
it is contained gradually
decreases, the pressure and
temperature will increase
3. The pressure of a given
volume of confined gas will
increase and its temperature
will decrease if its volume
decreases
4. The pressure of a given
volume of confined gas will
decrease and its temperature
will increase if its volume
decreases
5-22. The highest temperature and
pressure of the refrigeration
cycle begins at what device or
location?
1.
Receiver
2.
Condenser
3.
Discharge side of the
compressor
4.
Discharge side of the ther–
mostatic expansion valve
5-23.
When the system is shut down,
what prevents high-pressure
discharge from the compressor
from motorizing the compressor in
reverse?
1.
The check valve
2.
The relief valve
3.
The charge valve
4.
The high-pressure cutout
switch
5-24.
At what differential pressure
range across the filter will the
bypass device open and permit
unfiltered oil to circulate
through the compressor?
1.
13.5 to 16.5 psi
2.
16.5 to 18.5 psi
3.
16 to 20 psi
4.
18 to 22 psi
IN ITEMS 5-25 AND 5-26, SELECT FROM
COLUMN B THE COMPONENT USED FOR THE
FUNCTION GIVEN IN COLUMN A.
A. Functions
B. Components
5-25.
5-26.
To facilitate. 1.
individual
group servicing
or servicing
the system as
one complete 2.
unit
To bleed the 3.
system and to
attach test
equipment or the
vacuum pump
Condenser
ejector
shutoff
valve
Purge
valve
Charging
valves
Learning Objective:
Recognize vapor cycle
charging cart heater tank
capacity and the oil
charginq cylinder’s
temperature/pressure
relation.
5-27. What is the capacity of the Freon
storage bottle in the vapor cycle
charging cart shown in fig. 3-18
in the text?
1.
20 pounds
2.
25 pounds
3.
20 gallons
4.
25 gallons
5-28. The vacuum pump has a
displacement of 3 cubic feet per
minute (cfm) and is rated for
continuous duty.
1.
True
2.
False
5-29. What is the capacity in cubic
inches of the heater tank on the
vapor cycle charging cart?
1.
280 cubic in
299 cubic in
2.
3.
330 cubic in
4.
360 cubic in
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