單項(xiàng)選擇題Fire dampers prevent the fire spreading through the process of ().

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

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1.單項(xiàng)選擇題A fire, occurring in the windings, of an overloaded electrical motor, is considered a ().

A.class "A" fire
B.class "B" fire
C.class "C" fire
D.class "D" fire

3.單項(xiàng)選擇題Which of the listed materials would be considered as a bunting class "C" fire?()

A.Fuel oil
B.Wood
C.Celluloid
D.Electrical insulation

4.單項(xiàng)選擇題Except in rare cases, it is impossible to extinguish a shipboard fire by ().

A.removing the heat
B.removing the oxygen
C.removing the fuel
D.interrupting the chain reaction

5.單項(xiàng)選擇題A class "C" fire is burning ().

A.diesel oil
B.magnesium
C.dunnage
D.electrical insulation

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