A.Static electricity
B.An open running electric motor
C.Loose wiring
D.Explosion proof lights
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A.Class "A"
B.Class "B"
C.Class "C"
D.Class "D"
A.convection
B.conduction
C.radiation
D.direct contact
A.class "A" fire
B.class "B" fire
C.class "C" fire
D.class "D" fire
A.5%
B.10%
C.25%
D.40%
A.Fuel oil
B.Wood
C.Celluloid
D.Electrical insulation
最新試題
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