默认题库 - 船舶设备名称

A. prevent the passage of flammable gases
B. prevent the passage of poisonous vapors
C. delay the spread of heat and flames
D. maintain watertight integrity

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单选题

Permission is kindly requested（）the ballast water.

A. pump out
B. to pump out
C. pumping out
D. be pumped out

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单选题

The function of the bypass valve on the self-contained breathing apparatus is to（）.

A. control the pressure of the oxygen as it enters the body
B. allow the wearer to manually give himself oxygen
C. release excess heat which would otherwise cause the bottle to explode
D. allow exhaled gases to pass outside the bottle

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单选题

The most common type of davit found on merchant vessels today is the（）.

A. radial
B. sheath-screw
C. gravity
D. quadrantal

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单选题

As oil pipe line connections were broken，（）quantity of oil was caused to spill onto the wharf and into the dock water.

A. a not knowing
B. an unknowing
C. an unknown
D. a not know

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