A.cutout
B.pressure controller
C.controller switch
D.cutout switch
您可能感興趣的試卷
你可能感興趣的試題
A.remove any air that may accumulate in the system
B.take out unpleasant fumes from the refrigerant
C.vent off excess refrigerant in an emergency
D.permit opening the refrigerating system for cleaning and inspecting
A.to increase the system efficiency by sensible heat transfer
B.to stop the liquid from flashing
C.to reduce the load on the compressor
D.to remove latent heat of vaporization and the suction piping transfer
A.its pressure and temperature are both lowered
B.its pressure and temperature are both raised
C.its pressure is lowered and its temperature is raised
D.its pressure is raised and its temperature is lowered
A.thermal valve
B.magnetic stop valve
C.bellows valve
D.bimetallic valve
A.high-pressure cutout switch is jammed open
B.low-pressure switch is jammed shut
C.thermal bulb is not operating properly
D.scale trap is clogged
最新試題
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
Which of the following items don’t belong to dock repair works?（）
Diesel engine air start system check valves are opened by （）
（） is not installed on the main switchboar.
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
Cold weather starting of a diesel engine may be made easier by（）