A.facilitate the installation of piston rings
B.allow for the expansion of the piston during operation
C.prevent crankcase vapors from entering the combustion chamber
D.reduce wearing of the upper cylinder liner
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A.direct action of cam shaft
B.compressed air pressure
C.hydraulic “push rods”
D.direct action of the main piston moving down
In a diesel engine, excessive cylinder liner wear will cause （）
(1) increased blow-by
(2) wear between the piston ring and groove
A.(1) only is correct
B.(2) only is correct
C.both (1) and (2) are correct
D.neither (1) or (2) axe correct
A.area times the stroke
B.area times the stroke, times the number of cylinders
C.volume times the stroke
D.volume times the stroke, times the number of cylinders
A.water-tube supercritical circulation
B.water-tube forced circulation
C.fire-tube controlled circulation
D.fire-tube express circulation
A.regulating the speed of the turbocharger
B.rotating the fuel injector pump plunger
C.regulating the speed of the fuel oil transfer pump
D.changing engine timing
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Lube oil cannot be efficiently filtered if its （）.
The highest pressure in a diesel engine cylinder normally occurs （）.
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.
The function of diesel engine piston compression rings is to （）.
Combustion knock occurring in a diesel engine can be caused by （）.
When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）
Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）
The ability of the governor to prevent fluctuations in engine speed is termed （）.
If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.