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單項選擇題

Which of the following statements is least likely to cause the ignition of fuel vapors?（）

A.Static electricity
B.An open running electric motor
C.Loose wiring
D.Explosion proof lights

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單項選擇題

A burning AC motor would be considered what class of fire?（）

A.Class "A"
B.Class "B"
C.Class "C"
D.Class "D"

單項選擇題

Fire dampers prevent the fire spreading through the process of （）.

A.convection
B.conduction
C.radiation
D.direct contact