The Fahrenheit scale is based on boiling water at sea level at what temperature?
A: 459 degrees
B: 212 degrees
C: 180 degrees
D: 100 degrees B: 212 degrees
Zero pounds gauge corresponds on the absolute scale to:
A: 144
B: 212
D: Attach gauge manifold, recharge the system, evacuate the system, replace filter core. ✔✔A:
Attach gauge manifold, recover refrigerant, replace filter core, evacuate the system, recharge the
system.
As the pressure on a liquid is increased, the vaporization temperature of the liquid
A: Decreases
B: Increases
C: Remains unchanged
D: Varies ✔✔B: Increases
An oil separator must be mounted
,A: Level
B: Below the compressor crankcase
C: Above the compressor crankcase
D: In the suction line ✔✔A: Level
Which of the following metering devices controls evaporator pressure?
A: Thermostatic expansion valve
B: Fixed orifice
C: Low side float
D: None of these ✔✔D: None of these
, An automatic expansion valve controls evaporator pressure.
The purpose of the external equalizer on a thermostatic expansion valve is
A: To equalize evaporator pressure drop with respect to the TEV
B: To equalize the evaporator pressure drop
C: To help prevent liquid floodback
D: To allow the high side pressure to equalize to the low side when the compressor cycles off
✔✔A: To equalize evaporator pressure drop with respect to the TEV
The higher the MERV rating of a filter-drier, the
A: More efficient the drier at absorbing moisture
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