单项选择题
A.heat, gas, and flames B.fuel, heat, and oxygen C.heat, nitrogen, and fuel D.fuel oil, nitrogen, and oxygen
Engines for lifeboats are required to have sufficient f...
单项选择题Engines for lifeboats are required to have sufficient fuel to operate for how many hours?（）
A.6 hours B.12 hours C.18 hours D.24 hours
If a fire occurs in the boiler room as a result of a le...
单项选择题If a fire occurs in the boiler room as a result of a leaking fuel line, you should FIRST （）.
A.notify the engineer on watch B.isolate and secure the piping C.throw sand on the fire D.extinguish the fire using a combination nozzle with applicator
The four basic components of a fire are chain reaction,...
单项选择题The four basic components of a fire are chain reaction, heat, fuel, and （）.
A.carbon monoxide B.oxygen C.carbon dioxide D.any gaseous substance
