A.big size
B.fuel economy
C.low speed
D.high power
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A.at high speed and full load
B.at low speed and part load
C.when heavy fuel oil is used at sea
D.when the ships run long distance
A.can’t be controlled very precisely
B.can’t be controlled as flexibly as the separate pump system
C.can be controlled as flexibly as the separate pump system
D.can be controlled more precisely and flexibly
A.A common rail engine;conventional engines
B.A conventional engine;common rail engines
C.A marine diesel engine;most other engines
D.A two-stroke engine;four-stroke engines
A.by injection pumps
B.at a time decided by the injection pump timing
C.by a signal opening the magnetic valves
D.at a time decided by the cam directly
A.stored in a common fuel line
B.pumped by the injection pump
C.at low pressure
D.already atomized
A.fluctuates with the engine speed to some extent, independent of the engine speed
B.keeps constant at all engine speed, dependent on the engine speed to some extent
C.keeps constant at all engine speed, independent of the engine speed
D.is decided by the engine speed, constant at all engine speed
A.for FP, once fitted, the position of the blades can also be changed in operation
B.for CP, once fitted, the position of the blades can also be changed in operation
C.the CP type has a relatively smaller hub compared with the FP propellers
D.the FP type has a relatively larger hub compared with the CP propellers
A.shaft
B.boss
C.wheel
D.lever
A.higher
B.lower
C.very higher
D.very lower
A.A special sealing gland
B.Propeller
C.Tailshaft
D.Sterntube bearing
最新试题
The main purpose of port State control is not to()
The ISPS Code consists of a mandatory section-Part A, which shows()
Using a file without a handle may result in ()
Engine parameters shall be corresponded to NOx Technical Files. This is required by ()
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a()
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated()
If separating effect is not good, which measure should be taken ()
The shipboard oil pollution emergency plan will be invalid after ()
()are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the()