Oil control rings used in two-stroke/cycle diesel engines are located near the bottom of the piston skirt in order to （）

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

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更多“Oil control rings used in two-stroke/cycle diesel engines are located near the bottom of the piston skirt in order to （）”相关的问题

第1题

[单选题] If the piston groove drain holes for the oil control rings become clogged, which of the following is likely to occur?（）

A、The oil control rings will seal improperly and wear rapidly B、The piston will overheat due to insufficient lubrication C、Excessive oil will remain on the cylinder wall D、Light brown smoke will emanate from the engine exhaust

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第2题

[单选题] 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

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第3题

[单选题] High lube oil temperatures developing in a diesel engine can result from（）

A、high oil pressure B、excessive bearing end play C、plugged oil control rings D、engine overload

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第4题

[单选题] In a diesel engine, blow-by is generally the result of worn（）

A、valve guides B、oil control rings C、valve seats D、compression rings

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第5题

[] The primary purpose of oil control rings on a diesel piston is to（）

A、A.provide a reservoir for cylinder lubrication B、B.pump oil into the combustion space for cylinder cooling C、C.prevent excessive lubricating oil consumption D、D.allow hydraulic oil film formation on the cylinder

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第6题

[单选题] In order to keep excess oil from the intake ports in two-stroke/cycle diesel engines, （）

A、wide compression rings are used B、oil rings are located above the piston C、chromium plating is used on all piston rings D、oil rings are located near the bottom of the piston skirt

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第7题

[单选题] In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt, the "piston ring belt" means （）.

A、piston crown B、piston ring groove C、piston skirt D、piston ring area

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第8题

[] The control spindle operates the slipper ring or （） of the variable delivery pump, which controls the suction and discharge of the oil.

A、A.servo-motor B、B.swash plate C、C.plunger D、D.cylinder

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第9题

[单选题] The lowest ring of a piston is （）.

A、a coil spring B、a sealing ring C、an oil distributor ring D、main seal ring