A.Globe valve
B.Butterfly valve
C.Gate valve
D.Packless valve
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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
A.greater at the bow and stern
B.reduced at the bow and stern
C.uniform over the length of the vessel
D.uniform over the length of the vessel，with the exception of the machinery spaces，where it is reduced due to increased stresses
A.Safe working load
B.Ship's working lift
C.Starboard wing lift
D.Stress，weight，load
A.crow bar
B.device to force a water tight door against the frame
C.heavy steel beam
D.wedge
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An example of a modern anchor which has a stock is a(n)（）.
Centrifugal pumps have what advantage(s) over reciprocating pumps?（）.
The holding capability of an anchor is primarily determined by the（）.
The portable radio apparatus means（）.
The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.
The exhaust pipe must be gas tight throughout its entire length otherwise（）.
The C02 flooding system is actuated by a sequence of steps which are（）.
In ship construction，frame spacing is（）.
Cargo pump relief valves are piped to the（）.
In nautical terminology a dog is a（）.