amount of superheat in the vapor leaving the coil
amount of superheat in the liquid
temperature in the evaporator coils
pressure in the evaporator coils
第1题：
add refrigerant to the system
adjust the thermal expansion valve to the proper setting
adjust the float valve to the proper holding pressure
open the hand expansion valve
第2题：
higher
lower
the same
none of the above
第3题：
A thermostatic expansion valve is properly controlling evaporator superheat. Adjusting this valve to lower the superheat will result in a/an
A.evaporator pressure decrease
B.evaporator coil over-feed
C.evaporator capacity increase
D.expansion valve diaphragm rupture
第4题：
always be wide open when the compressor restarts
continue to operate as if the system were in operation
remain open until evaporator pressure equalizes, then close until the compressor restarts
always be completely closed until the compressor restarts
第5题：
king valve and the expansion valve
solenoid valve and expansion valve
evaporator and receiver
compressor and evaporator
第6题：
open
close
remain in its position
flood the evaporator with refrigerant
第7题：
Lube oil passing through the system
Moisture or foreign matter collecting at the valve seat and orifice
Variable spring tension caused by the changing temperature
Frost on the liquid line
第8题：
compressor
cooling coils
condenser
receiver
第9题：
nonexistent
for controlling pressure
for controlling superheat
for controlling the solenoid valve
第10题：
in the middle of evaporator coils
near the evaporator coil outlet
near the evaporator coil inlet
on the bottom row of evaporator coils