A.Safe working load
B.Ship's working lift
C.Starboard wing lift
D.Stress，weight，load
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A.crow bar
B.device to force a water tight door against the frame
C.heavy steel beam
D.wedge
A.that the fuel valve is open
B.if the air supply system is open
C.if the water sprinkler system is open
D.if the limit switch is on
A.a defective ignition system
B.low lube oil level
C.weak valve springs
D.too heavy a load
A.once each crankshaft revolution
B.twice each crankshaft revolution
C.every other crankshaft revolution
D.every fourth stroke
A.They are less expensive
B.They are smaller for equivalent pumping ability
C.They pump more cargo in less time
D.All of the above
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The portable radio apparatus means（）.
As oil pipe line connections were broken，（）quantity of oil was caused to spill onto the wharf and into the dock water.
If a gasoline engine turns over freely but will not start，the cause is generally（）.
In ship operations，hoisting and lowering pipe in and out of the drilled hole is the main function of the（）.
Cargo pump relief valves are piped to the（）.
If the engine of a survival craft does not start，check to see（）.
The function of the bypass valve on the self-contained breathing apparatus is to（）.
Permission is kindly requested（）the ballast water.
The C02 flooding system is actuated by a sequence of steps which are（）.
The most common type of davit found on merchant vessels today is the（）.