單項選擇題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


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1.單項選擇題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

2.單項選擇題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

3.單項選擇題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

4.單項選擇題An aneroid barometer is an instrument（）.

A.used to measure the speed of wind
B.in which the pressure of air is measured
C.that tells which dirction a storm is coming from
D.used to measure the height of waves

5.單項選擇題An emergence sea anchor may be constructed by type of extinguisher?（）.

A.a boat bucket
B.an air tank filled with water
C.an oar and canvas weighted down
D.All of the above