A.dry bulb temperature
B.wet bulb temperature
C.dew point
D.dry point
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A.change from blue to orange
B.‘flare up’ and remain lighted
C.probably go out
D.stay blue
A.flushed with clean refrigerant oil
B.purged with the refrigerant
C.washed with an ammonia and alcohol solution
D.grounded to compressor
A.petroleum crystals
B.phosgene gas
C.water vapor
D.carbon monoxide
A.be clear
B.be blue
C.be light green
D.show bubbles
A.temperature in the space being cooled
B.liquid refrigerant pressure at the solenoid valve
C.pressure drop across the evaporator coils
D.refrigerant gas superheat at the coil outlet
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Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
Cold weather starting of a diesel engine may be made easier by（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
Diesel engine air start system check valves are opened by （）
The treatment of the fuel oils involves storage, heating, filtering and（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）