單項選擇題Oil fires are best extinguished by（）.

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


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1.單項選擇題Multiple fire pumps may be used for other purposes provided that one pump is（）.

A.on line to the fire main
B.kept available for use on the fire main at all times
C.capable of being connected to the fire main
D.rated at or above 125 psi

2.單項選擇題Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces，such as in a pumproom，provided that the（）.

A.persons in the space wear gas masks
B.persons in the space wear damp cloths over their mouths and nostrils
C.ventilation system is secured and all persons leave the space
D.ventilation system is kept operating

3.單項選擇題Inflatable liferafts are less maneuverable than lifeboats due to their（）.

A.shape
B.shallow draft
C.large sail area
D.All of the above

4.單項選擇題In which situation could a vessel most easily capsize?（）

A.Running into head seas
B.Running in the trough
C.Running with following seas
D.Anchored with your bow into the seas

5.單項選擇題In heavy seas you decide to heave to. The lifeboat should be（）.

A.brought to a position with the stern into the seas
B.allowed to take its own head
C.brought to lay in the trough
D.brought bow into the seas