單項選擇題Nylon line can be dangerous because it（）.

A.breaks down when wet
B.kinks be discharged
C.is not elastic
D.stretches


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1.單項選擇題0f all the extinguishing agents listed below, which one has the greatest capacity for heat adsorption?（）.

A.Water fog
B.Carbon dioxide
C.Dry chemical
D.Solid stream of water

2.單項選擇題0il fires are best extinguish by（）.

A.cutting off supply of oxygen
B.removing the fuel
C.cooling below the ignition temperature
D.spraying with water

3.單項選擇題0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the（）.

A.vertical position
B.horizontal position
C.boom stop angle
D.minimum radius angle

4.單項選擇題0n a vessel ,a C02 extinguisher is checked by（）.

A.reading the gage pressure
B.weighing the extinguisher
C.discharging a small amount of CO2
D.seeing if the seal has been broken

5.單項選擇題0n a vessel,multipiying a load’s weight by the distance of the load’s center of gravity above the baseline results in a(n)（）.

A.transverse moment
B.vertical moment
C.righting moment
D.inclining moment