A、A.flow of petroleum through pipes
B、B.spraying or splashing of petroleum
C、C.settling of solids or water in petroleum
D、D.All of the above
更多“Static electricity may be built up by the（）.”相关的问题
A、
A、
A、A.provide safe electrical power connection to barge equipment B、B.keep the vessel from surging excessively C、C.prevent an accidental discharge of
A、
A、oil leakage in engine-room B、hot work (welding, cutting, etc) C、
A、keeps sparks from falling into an open tank B、secures covers on ullage openings C、prevents sparks from getting out of an engine's exhaust system D、grounds
A、A.non-synchronous electric motor B、B.synchronous electric motor C、C.fully enclosed electric motor D、D.watertight electric motor
A、A.keeps sparks from falling into an open tank B、B.secures covers on ullage openings C、C.prevents sparks from getting out of an engine's exhaust system D、D.grounds
A、After operation, start the electric motor. B、Before operation, stop the electric motor. C、Before operation, start the electric motor. D、After operation, stop the electric motor.
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