A.should
B.shall
C.that
D.if
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A.casing
B.outer hose
C.line cover
D.jacket
A.refractory
B.the screen wall
C.the water wall
D.fire plate
A.the accumulation of explosive gases
B.faster cooling of the fire
C.the fire to spread through the ventilation system
D.fixed foam systems to be ineffective
A.must be fixed if the vessel exceeds 12 meters in length
B.may be used as a fire pump
C.must be portable if there are more than 4 watertight compartments
D.must be capable of pumping at least 450 gpm
A.remove oxygen from the area
B.cool fuel below ignition temperature
C.smother with CO2
D.smother fire with foam
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One of the limitations of foam as an extinguishing agent is that foam（）.
Lifesaving regulations require that a fire drill include（）.
The blocking or absence of fire dampers can cause（）.
Operation of the valve control release on a fixed CO2 system must immediately（）.
Regular foam can be used on all but which flammable liquid?（）
Radiation spreads a fire by（）.
On a ship，when may a work vest be substituted for a required life preserver?（）
Once a vessel has loaded packaged hazardous cargo，the cargo spaces shall be inspected. The spaces shall also be inspected at least once in every 24 hours. The only exception to daily inspection is when（）.
Prior to getting underway，the Master or person in charge of a ship must（）.
The disadvantage of using CO2 is that the（）.