更多"Improperly fitted piston rings in a"的相关试题:
[单项选择]Piston compression rings used in a diesel engine function to （）
A. transfer heat from the cylinder to the piston
B. scrape oil from the sides of the piston
C. seal the combustion space from the crankcases
D. prevent any piston contact with the cylinder liner
[单项选择]
In a diesel engine, when refitting piston rings you should （）
Ⅰ.check the ring gap at the smallest diameter of the cylinder
Ⅱ. Remove carbon from the ring groove
A. Ⅰ only
B. Ⅱ only
C. both Ⅰ and Ⅱ
D. neither Ⅰ nor Ⅱ
[单项选择]If the compression rings on a diesel engine piston become stuck in the ring groove, the cause may be due to（）
A. excessive ring action
B. excessive ring temperature
C. improper ring rotation
D. excessive ring face wear
[单项选择]When installing rings on a diesel engine piston, you should check the ring（）
A. diametrical tension
B. gap clearance
C. radial thickness
D. face thickness
[单项选择]The function of diesel engine piston compression rings is to （）.
A. prevent piston side thrust
B. prevent engine friction losses
C. transmit heat from the piston to the cylinder liner
D. remove oil from the cylinder combustion space
[单项选择]A condition contributing to diesel engine piston rings sticking in the ring grooves, is insufficient ring clearance at the ring（）
A. gap
B. side
C. back
D. radial
[单项选择]For diesel engine piston cooling, lubricating oil can be supplied to the pistons by a/an （）.
A. oil spray
B. oil bath
C. oil control rings
D. drilled passage through the camshaft
[单项选择]A diesel engine piston ring face is in direct contact with the （）.
A. top of the ring groove
B. cylinder liner oil film
C. bottom of the ring groove
D. back of the ring groove
[单项选择]The linear motion of a diesel engine piston is converted to the rotary motion required to drive gears, propeller shafts, and generators by the （）.
A. flywheel
B. crankshaft
C. journal bearings
D. camshaft
[单项选择]A diesel engine piston crown can crack from （）
A. excessive piston to liner clearance
B. excessive dirt beneath the piston crown that reduces heat transfer
C. faulty nozzle spray
D. all of the above
[单项选择]Diesel engine piston seizure can be caused by （）
A. poor cooling of cylinder walls
B. improper cooling of the piston
C. insufficient piston lubrication
D. all of the above
[单项选择]Diesel engine piston ring blow-by is usually caused by excessive ring clearance at the ring（）
A. back
B. side
C. gap
D. bottom
[单项选择]Excessive piston ring wear in a diesel engine will cause（）
A. high lube oil viscosity
B. increased lube oil consumption
C. low lube oil temperatures
D. high firing pressures
[单项选择]
In a diesel engine, when installing new piston rings it is important to check（）
Ⅰ.ring gap clearance
Ⅱ.side clearance
A. Ⅰ only
B. Ⅱ only
C. both Ⅰ and Ⅱ
D. neither Ⅰnor Ⅱ
[单项选择]In a four-cycle diesel engine piston blow-by can result in increased（）
A. crankcase pressure
B. compression pressure
C. scavenge pressure
D. exhaust manifold pressure
[单项选择]On a four-stroke diesel engine, when the piston is driven downwards by the expanding gas, it delivers power to the crankshaft through the （）.
A. thrust block
B. sounding rod
C. connecting rod
D. push rod
[单项选择]
In a trunk type diesel engine piston, the thickness of the head or crown is determined by the（）
Ⅰ.statically balanced
Ⅱ.heat dissipation requirement
A. Ⅰ only
B. Ⅱ only
C. both Ⅰ and Ⅱ
D. neither Ⅰ nor Ⅱ
[单项选择]A piston in a four-stroke/cycle diesel engine makes four strokes during each （）.
A. crankshaft revolution
B. mechanical cycle of operation
C. period of two combustion cycles
D. cycle of two events
