A.Increased turbulence
B.increased mechanical efficiency
C.Increased brake mean effective pressure
D.All of the above
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A.high exhaust temperature
B.low exhaust temperature
C.fuel knock in each cylinder
D.mechanical knock in each cylinder
A.sea water temperature must never be warmer than 40℃
B.jacket water pressure should always be greater than the sea water pressure
C.jacket water temperature must always be less than 60℃
D.jacket water pressure must always be less than the sea water pressure
In a medium speed diesel engine, a trunk type piston may be cooled by（）
Ⅰ.oil circulation though passages in the piston crown
Ⅱ.heat transfer through piston rings and liner wall
A.Ⅰ only
B.Ⅱ only
C.either Ⅰ or Ⅱ
D.neither Ⅰ or Ⅱ
A.power the after-coolers
B.power the turbocharger
C.reduce the cylinder scavenge effect
D.cool the turbocharger
A.corrosive deterioration of a bearing
B.inadequate air filtration
C.excessive ring and liner wear
D.excessive cooling of lubricating oil
最新試題
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
The main purpose of port State control is not to（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
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（）
Using a file without a handle may result in （）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
Cold weather starting of a diesel engine may be made easier by（）