单项选择题
A.Class "A" B.Class "B" C.Class "C" D.Class "D"
Fire dampers prevent the fire spreading through the pro...
单项选择题Fire dampers prevent the fire spreading through the process of （）.
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%
