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External and internal leakage in hydraulic systems may be caused by （）.

A.unusual vibration
B.excessive worn parts
C.abnormal pressure
D.any of the above

The ISM Code is a part of （）

A.SOLAS
B.MARPOL
C.STCW
D.Ballast Water convention

Which of the following statements describes the relationship between viscosity and specific gravity?（）

A.Liquids with different viscosities will always have the same specific gravity
B.Liquids with different viscosities will never have the same specific gravity
C.Viscosity and specific gravity are directly proportional
D.Viscosity and specific gravity are not related in that one does not define or limit the other

單項(xiàng)選擇題

Usually the panels are interlocked with （） so that the devices can be made dead before the doors are opened.

A.protective earth
B.isolators
C.ground switch
D.circuit-breakers

單項(xiàng)選擇題

In a simple mechanical governor, the （）.

A.centrifugal force rotates the ball-head
B.flyweight centrifugal force is balanced by spring force
C.flyweight centrifugal force is balanced by hydraulic pressure
D.speeder spring alone actuates the fuel control rod

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輪機(jī)英語(yǔ)單項(xiàng)選擇題每日一練(2019.09.20)

External and internal leakage in hydraulic systems may be caused by （）.

The ISM Code is a part of （）

Which of the following statements describes the relationship between viscosity and specific gravity?（）

Usually the panels are interlocked with （） so that the devices can be made dead before the doors are opened.

In a simple mechanical governor, the （）.