A.once each crankshaft revolution
B.twice each crankshaft revolution
C.every other crankshaft revolution
D.every fourth stroke
您可能感興趣的試卷
你可能感興趣的試題
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
In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.
In ship construction，frame spacing is（）.
Each cylinder in a two stroke cycle engine experiences combustion（）.
In ship operations，hoisting and lowering pipe in and out of the drilled hole is the main function of the（）.
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（）.
An LWT anchor often has difficulty tripping in（）.
The most common type of davit found on merchant vessels today is the（）.
All electrical appliances aboard a vessel should be grounded to（）.
If the engine of a survival craft does not start，check to see（）.
The C02 flooding system is actuated by a sequence of steps which are（）.