航海英语海上消防单项选择题每日一练(2018.10.18)

单项选择题
At night while the ship is tied up to the dock，a fire breaks out in a cargo hatch. After sounding the alarm，what should the person on watch do?（）
A.Begin fighting the fire immediately
B.Await further orders from the Master
C.Let go the lines to let the vessel drift to an anchorage
D.Send a person to summon the shore authorities
单项选择题
Backfire flame arrestors are installed on（）.
A.fuel tanks
B.spark plugs
C.carburetors
D.distributors
单项选择题
Fire extinguishing agents used on Class C fires must be（）.
A.able to absorb heat
B.water based
C.nonconducting
D.nontoxic
单项选择题
Automatic fire dampers in ventilation systems are operated by use of（）.
A.remotely operated valves
B.fusible links
C.C0₂ system pressure switches
D.heat or smoke detectors
单项选择题
According to the T-Boat regulations the reason for providing adequate ventilation for a battery storage area is to prevent（）.
A.accumulation of carbon dioxide gas that chokes the battery
B.accumulation of explosive and toxic gases the battery can generate
C.mildew or dry rot in the battery box
D.battery failure including battery case meltdown caused by excessive heat