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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Operation of the valve control release on a fixed CO2 system must immediately（）.
The atmosphere in a tank is too lean if it is（）.
The all-purpose nozzle will produce a fog spray when you（）.
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（）.
On a ship，watertight doors should be operated（）.
On a ship，when may a work vest be substituted for a required life preserver?（）
Portable foam type fire extinguishers are most effective on（）.
One advantage of the all-purpose nozzle is that it（）.
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.
Regular foam can be used on all but which flammable liquid?（）