单项选择题Diesel engine air start system check valves are opened by ()

A.an air start cam
B.cylinder compression pressure
C.starting air pressure
D.valve springs


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1.单项选择题The cetane rating of diesel fuel is an indication of the ()

A.ignition quality of the fuel
B.calorific value of the fuel
C.flash point of the fuel
D.rate of fuel consumption

2.单项选择题The condensers located in various stages of a flash evaporator are cooled by()

A.distillate
B.seawater
C.brine
D.air

5.单项选择题To shut down a diesel engine after it exceeds the set maximum speed,which type of device listed should be used?()

A.Speed limiting governor
B.Over-speed governor
C.Over-speed trip
D.Over-speed relay

7.单项选择题Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the()

A.double bottom fuel oil tank temperature
B.heater supply steam flow
C.pressure of the fuel supplied to the burners
D.attemperator steam flow in the heater discharge circuit

8.单项选择题“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a()

A.substandard ship
B.standard ship
C.over-standard ship
D.reference ship

9.单项选择题Using a file without a handle may result in ()

A.your work becoming rounded
B.injury to your hand
C.overheating of the file
D.pinning

10.单项选择题The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated()

A.for atomizing
B.for centrifuging
C.in a storage tank
D.in the re-circulating line