【名词&注释】
相容性(compatibility)、水位计(water level gauge)、值班人员(operator on duty)、落水者(fall in water person)
[单选题]值班人员应每隔()h至少冲洗水位计一次。
A. 3
B. 4
C. 5
D. 6
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举一反三：
[单选题]常见的泡沫灭火系统有压力定比型、________、预混型三种。
A. 线路定比型
B. 固定型
C. 风动型
D. 可移动型
[单选题]“NE” stands for ________
A. east-north
B. north-east
C. north and east
D. northeastern
[单选题]A thrust bearing is used with a propulsion diesel engine to ____.
A. control axial movement of the crankshaft
B. transmit engine thrust to the propeller shaft
C. absorb vibrations in the propeller shafting
D. prevent propeller thrust from being transmitted to the hull
[单选题]落水者(fall in water person)在水中切勿将衣服抛弃，因为衣服可以______。(1)做浮具(2)抗御寒冷和烈日(3)便于让救援者提拉
A. (1)(2)(3)
B. (1)(2)
C. (2)(3)
[单选题]Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed ___.
A. apparent slip
B. true slip
C. pitch
D. propulsive efficiency
[单选题]货物的相容性是指()。
A. 货物之间的反应可能
B. 货物本身的稳定性
C. 货物与环境之间的影响
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