单项选择题
A.convection B.conduction C.radiation D.direct contact
A fire, occurring in the windings, of an overloaded ele...
单项选择题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
On a cargo vessel, fire and boat drills must be held wi...
单项选择题On a cargo vessel, fire and boat drills must be held within 24 hours of leaving port if the percentage of the crew replaced is more than （）.
A.5% B.10% C.25% D.40%
Which of the listed materials would be considered as a ...
单项选择题Which of the listed materials would be considered as a bunting class "C" fire?（）
A.Fuel oil B.Wood C.Celluloid D.Electrical insulation
