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
Centrifugal pumps have what advantage(s) over reciprocating pumps?（）.
As oil pipe line connections were broken，（）quantity of oil was caused to spill onto the wharf and into the dock water.
Permission is kindly requested（）the ballast water.
The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.
Each cylinder in a two stroke cycle engine experiences combustion（）.
In ship construction，frame spacing is（）.
The purpose of a bilge well is to（）.
Limit switches are used on which davits?（）
In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.
The series of valves used to control the return flow in well control operations is called the（）.