單項選擇題

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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單項選擇題

In describing basic diesel engine operation，the term ‘event’ refers to （）

A.the production of high pressure gases
B.the removal of expended combustion gases
C.the admission of air to the cylinder
D.all of the above

單項選擇題

To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）

A.Speed limiting governor
B.Over-speed governor
C.Over-speed trip
D.Over-speed relay

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

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In describing basic diesel engine operation，the term ‘event’ refers to （）

To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）

In describing basic diesel engine operation，the term ‘event’ refers to （）