around the engine
around the cooler
to the expansion tank
overboard
第1题：
What type of valve is used to direct the flow of hydraulic fluid?
A.relief valve
B.direction control valve
C.stop valve
D.pressure control valve
第2题：
第3题：
The expansion valve used in a refrigeration system regulates the
A.superheat of the gas leaving the compressor
B.back pressure in the evaporator
C.temperature in the refrigerated space
D.degree of superheat of the gas leaving the evaporator
第4题：
open
close
remain in its position
flood the evaporator with refrigerant
第5题：
Relief valve
Direction control valve
Stop valve
Pressure control valve
第6题：
Valves on steam-smothering lines to cargo tanks shall be set with ______．
A.The master control valve shut and valves to individual cargo tanks shut
B.The master control valve open and valves to individual cargo tanks shut
C.The master control valve shut and valves to individual cargo tanks open
D.All valves open
第7题：
either all the way open or all the way closed
normally fully open
throttled depending on load
controlled by liquefied pressure
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：
a low level in the engine expansion tank
excessively high coolant pressure
improper temperatures
malfunctioning of the jacket water heater
第10题：
nonexistent
for controlling pressure
for controlling superheat
for controlling the solenoid valve