A.pump out
B.to pump out
C.pumping out
D.be pumped out
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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
A.Sheath-screw davits
B.Gravity davits
C.Radial davits
D.Quadrantal davits
A.Globe valve
B.Butterfly valve
C.Gate valve
D.Packless valve
A.swivel
B.cathead spool
C.drawworks
D.stand pipe
A.at each frame
B.amidships
C.one-third the distance from the bow
D.one-third the distance from the stern
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The most common type of davit found on merchant vessels today is the（）.
The C02 flooding system is actuated by a sequence of steps which are（）.
In ship construction，keel scantlings should be the greatest（）.
The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）
In nautical terminology a dog is a（）.
The exhaust pipe must be gas tight throughout its entire length otherwise（）.
If the engine of a survival craft does not start，check to see（）.
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.
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The holding capability of an anchor is primarily determined by the（）.