更多"Piston cooling fins are located（）"的相关试题:
[单项选择]The cooling of the piston is carried out by circulating （） across the underside of the crown and inside the ring belt or through specially shaped passages.
A. sea water
B. scavenging air
C. lubricating oil
D. fuel oil
[单项选择]The piston cooling system may employ similar components, except that （） is used instead of a head tank.
A. a sump tank
B. a feed well
C. a double bottom tank
D. a drain tank
[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 separate piston cooling system is used to limit any contamination （） piston cooling glands（） the piston cooling system only.
A. between；to
B. either；or
C. from；to
D. neither；nor
[单项选择]（） is sometimes used for piston cooling since leaks into the crankcase would not cause problems.
A. Diesel oil
B. Hydraulic oil
C. Lube oil
D. Mineral oil
[单项选择]As to the piston cooling, of the following, which statement is not true?（）
A. Because the piston is exposed to very high temperature, it must be cooled
B. The lower the piston cooling temperature is, the better it is
C. Both water and lube oil can be used as coolant
D. One of the piston cooling methods is vibration cooling, with better effect
[单项选择]A separate piston cooling system is used （） any contamination from piston cooling glands to the piston cooling system only.
A. to help
B. to limit
C. to protect
D. to remove
[单项选择](Piston area)X(Piston stroke)K(numbers of the cylinders)=engine（）
A. brake horsepower
B. displacement
C. cylinder volume
D. cylinder clearance
[单项选择]Fins are installed on the generating tube surfaces in waste heat boilers to （）.
A. prevent soot fires in the exhaust system
B. prevent exhaust gas erosion of the tubes
C. increase the velocity of exhaust gas flow
D. increase the rate of heat transfer
[单项选择]Abnormal crankpin bearing and piston skirt surface wear indicate（）
A. a restricted air intake
B. a clogged connecting rod oil passage
C. incorrect connecting rod alignment
D. high cylinder firing temperatures
[单项选择]Fins are installed on the fireside of water-tubes used in waste boiler to（）
A. decrease the velocity of gases flowing past the tubes
B. increase the rate of heat transfer
C. reduce accumulations carbon deposits
D. direct the flow of gases
[单项选择]Insufficient end clearance on newly fitted piston rings in a diesel enginewill cause the rings to（）
A. jam in the most worn part of the cylinder when the rings expand
B. break in the most worn part of the cylinder when the rings expand
C. wear eccentrically on the side opposite the end gap
D. overheat and jam at the top center on the combustion stroke
[单项选择]Broken piston rings manifest themselves during the scavenge port inspection by（）
A. Lack of elastic tension, when the rings are pressed into the groove by means of a stick
B. Blackish appearance
C. Fractured rings and missing rings
D. all off the above
[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]The piston supporting body is mainly subjected to （） stress.
A. pushing
B. centrifugal
C. stretch
D. compressive
[单项选择]The piston rings are manufactured with a diameter （） the bore of the cylinder.
A. larger than
B. smaller than
C. equal to
D. none of the above
[单项选择]When inspecting piston rings through the ports of a two-stroke/cycle diesel engine, black areas on the sealing surfaces are the result of （）
A. insufficient lubrication
B. improper piston cooling
C. blow-by
D. overload operation
[单项选择]Improperly fitted piston rings in a diesel engine can cause（）
A. excessive lube oil consumption
B. lower than normal lube oil temperature
C. higher than normal exhaust back pressure
D. excessive crankshaft end play
