A.Dull black appearance
B.Bright appearance
C.Thin layer of lacquer
D.Thick oily film
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A.noise coming from that air starting valve
B.continuous operation of the starting air compressor
C.zero air pressure in the air starting system
D.overheated starting air pipe to the cylinder head
A.stop the engine by cutting off the cooling water supply
B.stop the engine by closing the air intake
C.slow the engine but not stop it
D.slow the engine to half of normal load
A.increase the liner area covered by the oil film
B.maintain an oil film on the lower liner where scuffing is prevalent
C.keep excess oil away from intake and exhaust ports
D.help cushion piston skirt side thrust by providing a hydrodynamic oil wedge
A.the production of high pressure gases
B.the removal of expended combustion gases
C.the admission of air to the cylinder
D.all of the above
A.Speed limiting governor
B.Over-speed governor
C.Over-speed trip
D.Over-speed relay
最新試題
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
The shipboard oil pollution emergency plan will be invalid after （）
If separating effect is not good, which measure should be taken （）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
The cetane rating of diesel fuel is an indication of the （）
When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
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Using a file without a handle may result in （）
The treatment of the fuel oils involves storage, heating, filtering and（）