單項(xiàng)選擇題All vessel personnel should be familiar with the survival crafe’s().

A.boarding and operating procedures
B.maintenance schedule
C.navigational systems
D.fuel consumption rates


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2.單項(xiàng)選擇題An ABC dry chemical fire extinguisher would be least effective against a fire in().

A.a mattress
B.spilled liquids such as oil or paint
C.high voltage electrical gear
D.a trash can

3.單項(xiàng)選擇題An advantage of a dry chemical over a carbon dioxide fire extinguish is its().

A.greater range
B.effective on all types of fires
C.cleanliness
D.All of the above

4.單項(xiàng)選擇題An advantage of an ABC dry chemical over a carbon dioxide extinguisher is().

A.lack of toxicity
B.the multipurpose extinguishing ability
C.bum-back protection
D.cooling ability

5.單項(xiàng)選擇題An advantage of nylon rope over manila is that nylon rope().

A.can be used in conjunction with wire or spring-lay rope
B.can be stored on decks exposed to sunlight
C.can hold a load even when a considerable amount of the yarns have been abraded
D.gives audible warning of overstress whereas manila does not