單項選擇題Which of the actions listed should be taken FIRST to control an oil fire in a fuel oil tank?（）

A.Commence draining that tank as quickly as possible
B.Seal off all vents to that tank
C.Activate the CO2 system to that tank
D.Shut off the steam heating coils


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1.單項選擇題The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.

A.secure all openings to the tank
B.discharge an initial charge of CO2 with a hand portable extinguisher
C.direct a fire hose into the tank and energize the fire main
D.spray the tank boundaries with a fire hose to promote cooling

2.單項選擇題In fighting a fire in a fuel tank, the FIRST action you should attempt is to （）.

A.secure all sources of fresh air to the tank
B.begin transferring the fuel to other tanks
C.top off the tank to force out all vapors
D.station someone at the fixed CO2 release controls

3.單項選擇題Which of the following conditions is true concerning a flammable liquid with a concentration above the upper explosive limit?（）

A.The mixture is too lean to burn
B.The mixture is too rich to burn
C.The vapor is about to explode
D.Conditions are perfect for combustion

4.單項選擇題The volatility of a liquid is the tendency of a liquid to （）.

A.ignite
B.explode
C.asphyxiate
D.vaporize

5.單項選擇題An oxygen indicator will detect （）.

A.the amount of oxygen in a space
B.the presence of harmful amounts of carbon monoxide
C.concentrations of explosive gas
D.All of the above