Ac432 Part 2

30 Questions  I  By Azortex
AC432 part 2 practice

  
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1.  A refrigeration system is operating with a vapor charged thermostatic expansion valve. The thermal bulb is sensing a suction line temperature that is higher than the temperature that allows liquid to be present in the bulb. Any additional increases in the evaporator load will ____.
A.
B.
C.
D.
2.  If a thermostatic expansion valve's thermal bulb came loose from the suction line at the outlet of the evaporator, which of the following could result?
A.
B.
C.
D.
3.  If the thermal bulb assembly develops a leak, what will occur?
A.
B.
C.
D.
4.  The purpose of an externally equalized thermostatic expansion valve is to ____.
A.
B.
C.
D.
5.  The primary function of an expansion device is to ____.
A.
B.
C.
D.
6.  A thermostatic expansion valve controls refrigerant flow to the evaporator based on ____.
A.
B.
C.
D.
7.  The purpose of a capillary tube is to ____.
A.
B.
C.
D.
8.  The TXV sensing bulb is mounted ____.
A.
B.
C.
D.
9.  When the load on the evaporator increases, the TX valve ____.
A.
B.
C.
D.
10.  The cross liquid charge bulb at the TXV contains fluid that ____.
A.
B.
C.
D.
11.  Balanced port TX valves are used to ____.
A.
B.
C.
D.
12.  The pressure limiting TX valve ____.
A.
B.
C.
D.
13.  If the power element of a TX valve loses its charge, the ____.
A.
B.
C.
D.
14.  A refrigeration system that continuously runs under high-load conditions (hot pull downs) would most likely use a thermostatic expansion valve with a vapor charged thermal bulb assembly.
A.
B.
15.  An automatic expansion valve uses a thermal bulb to help control the amount of refrigerant being fed into the evaporator.
A.
B.
16.  A refrigeration system requiring a "fast pull down" would most likely use a thermostatic expansion valve with a liquid - thermal bulb.
A.
B.
17.  The step-motor valve uses a small motor to control the valve's port, which in turn controls evaporator superheat.
A.
B.
18.  A vapor-charged thermal bulb assembly responds faster than a liquid-charged thermal bulb assembly.
A.
B.
19.  As the load on an evaporator increases, the automatic expansion valve will open to allow more refrigerant to enter the evaporator.
A.
B.
20.  A capillary tube controls the refrigerant flow into the evaporator.
A.
B.
21.  An AX valve works best when the evaporator load is constant.
A.
B.
22.  The pin or valve port piston of the electronic step-motor expansion valve can move a linear motion of 0.0783 inches/step.
A.
B.
23.  Too high of pressure entering the compressor will cause the density of suction gases entering the compressor to increase.
A.
B.
24.  As the evaporator load increases, an automatic expansion valve will _____ to reduce the evaporator pressure while a thermostatic expansion valve will _____ to reduce the evaporator superheat.
25.  The two pressures that push to close a thermostatic expansion valve are the _____ pressure and the _____ pressure.
26.  When the quantity of refrigerant flow to an evaporator is reduced, the amount of superheat in the vapor leaving the coil will _____.
27.  The correct term for a coil using a TX valve, capillary tubes, or restrictor is _____.
28.  The correct term for a coil using a low side float is _____.
29.  The TX valve maintains a constant _____.
30.  The automatic expansion valve maintains a constant _____.
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