A.a defective ignition system
B.low lube oil level
C.weak valve springs
D.too heavy a load
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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
A.cargo pump pressure gauges
B.crossover lines interconnecting two pumps
C.suction side of pumps
D.atmosphere through pump vents
A.advance
B.cavitation
C.edging
D.slip
A.a not knowing
B.an unknowing
C.an unknown
D.a not known
最新試題
Limit switches are used on which davits?（）
An example of a messenger is a（）.
The most common type of davit found on merchant vessels today is the（）.
The portable radio apparatus means（）.
Centrifugal pumps have what advantage(s) over reciprocating pumps?（）.
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 a gasoline engine turns over freely but will not start，the cause is generally（）.
Permission is kindly requested（）the ballast water.
All electrical appliances aboard a vessel should be grounded to（）.