A.prevent any lubricant from reaching
B.prevent excessive lubrication from reaching the combustion space
C.Provide metal-to-metal contact to seal the cylinder against blow-by
D.assure a positive means of scraping carbon accumulation from the cylinder
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A.Dull black appearance
B.Bright appearance
C.Thin layer of lacquer
D.Thick oily film
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
最新試題
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
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（）
Under MARPOL Code the ship to which it applies has to carry （）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
The cetane rating of diesel fuel is an indication of the （）
The shipboard oil pollution emergency plan will be invalid after （）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
The condensers located in various stages of a flash evaporator are cooled by（）
To proceed to the assistance of a ship in distress is（）
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