單項選擇題

A fire may be spread by which of the following means?（）

A.Conduction of heat to adjacent surfaces
B.Direct radiation
C.Convection
D.All of the above

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單項選擇題

If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may need to be （）

A.gas freed
B.inerted
C.filled with water
D.all of the above as necessary

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