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
最新試題
The boat is stowed on the davit rather than on a cradle with which type of davit?（）
Permission is kindly requested（）the ballast water.
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 bypass valve on a self-contained breathing device should be opened if（）.
The purpose of a bilge well is to（）.
If the engine of a survival craft does not start，check to see（）.
In relation to cargo gear，what does SWL mean?（）.
Anchors are prevented from running out when secured by the（）.
If a gasoline engine turns over freely but will not start，the cause is generally（）.
As the propeller turns，voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency，pitting of the blades，and vibration. These voids are known as（）.