A.Class "A"
B.Class "B"
C.Class "C"
D.Class "D"
您可能感興趣的試卷
你可能感興趣的試題
A.Conduction of heat to adjacent surfaces
B.Direct radiation
C.Convection
D.All of the above
A.gas freed
B.inerted
C.filled with water
D.all of the above as necessary
A.Static electricity
B.An open running electric motor
C.Loose wiring
D.Explosion proof lights
A.Class "A"
B.Class "B"
C.Class "C"
D.Class "D"
A.convection
B.conduction
C.radiation
D.direct contact
最新試題
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
The cetane rating of diesel fuel is an indication of the （）
The treatment of the fuel oils involves storage, heating, filtering and（）
（） is not installed on the main switchboar.
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
Using a file without a handle may result in （）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
If separating effect is not good, which measure should be taken （）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）