A.at the base of the flames
B.at the center of the flames
C.to the lee side of the flames
D.over the tops of the flames
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A.CO2 does not cool the fire
B.cylinders are regulated pressure vessels
C.C02 is not effective on class B fires
D.C02 is not effective on class C fires
A.water-tight
B.air-tight
C.fire-tight
D.oil-tight
A.should
B.shall
C.that
D.if
A.casing
B.outer hose
C.line cover
D.jacket
A.refractory
B.the screen wall
C.the water wall
D.fire plate
最新試題
One of the limitations of foam as an extinguishing agent is that foam（）.
Operation of the valve control release on a fixed CO2 system must immediately（）.
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（）.
One disadvantage of using regular dry chemical (sodium bicarbonate) in firefighting is that（）.
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.
On a ship，watertight doors should be operated（）.
Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by（）.
The disadvantage of using CO2 is that the（）.
Shipping society approved buoyant work vests are considered to be items of safety equipment and may be worn by members of the crew（）.