A.once each crankshaft revolution
B.twice each crankshaft revolution
C.every other crankshaft revolution
D.every fourth stroke
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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
A.brake
B.devil's claw
C.pawls
D.All of the above
最新試題
An example of a modern anchor which has a stock is a(n)（）.
In relation to cargo gear，what does SWL mean?（）.
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（）.
Limit switches are used on which davits?（）
If a gasoline engine turns over freely but will not start，the cause is generally（）.
The function of the bypass valve on the self-contained breathing apparatus is to（）.
The most common type of davit found on merchant vessels today is the（）.
As oil pipe line connections were broken，（）quantity of oil was caused to spill onto the wharf and into the dock water.
The purpose of a bilge well is to（）.