A.casing
B.outer hose
C.line cover
D.jacket
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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
A.spray directly on the base of the fire
B.flow the foam down a nearby vertical surface
C.sweep the fire with the foam
D.spray directly on the surface of the fire
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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（）.
The discharge from a carbon dioxide fire extinguisher should be directed（）.
The brickwork surrounding the firebox of a boiler is known as（）.
The disadvantage of using CO2 is that the（）.
Portable foam type fire extinguishers are most effective on（）.
The blocking or absence of fire dampers can cause（）.
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire，（）the claimant proves that the fire arose from fault or neglect on the part of the carrier，his servants or agents.
Radiation spreads a fire by（）.
One advantage of the all-purpose nozzle is that it（）.
Small quantities of flammable liquids needed at a work site should be（）.