either all the way open or all the way closed
normally open
throttled depending on load
controlled by suction pressure
第1题：
either all the way open or all the way closed
normally fully open
throttled depending on load
controlled by liquefied pressure
第2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3题：
When replacing a thermostatic expansion valve sensing bulb, it is necessary to
A.apply a light film of oil to increase heat transfer
B.apply a light film of oil to prevent oxidation
C.apply a heavy coating of grease to function as a heat sink
D.carefully coat the device with silicone sealant to reduce the effects of convective cooling
第4题：
king valve and the expansion valve
solenoid valve and expansion valve
evaporator and receiver
compressor and evaporator
第5题：
a low level in the engine expansion tank
excessively high coolant pressure
improper temperatures
malfunctioning of the jacket water heater
第6题：
compressor
cooling coils
condenser
receiver
第7题：
around the engine
around the cooler
to the expansion tank
overboard
第8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9题：
open
close
remain in its position
flood the evaporator with refrigerant
第10题：
nonexistent
for controlling pressure
for controlling superheat
for controlling the solenoid valve