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[主观题]
When required to work where there may be explosive gases, you should use tools which are .
A.approved by the Coast Guard
B.high carbon steel
C.fixed with a ferrous cover
D.nonsparking
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A.approved by the Coast Guard
B.high carbon steel
C.fixed with a ferrous cover
D.nonsparking
第1题
A.Lubrication
B.Cooling
C.Fuel
D.Electric ignition
第2题
A.Tow position
B.Proportional
C.Reset
D.Rate
第3题
A.leaking discharge valve
B.jammed suction valve
C.tripped overload relay
D.broken discharge un-loader
第4题
A.increases brine density
B.increases distillate salinity
C.reduces metal corrosion
D.reduces heat transfer
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