Top piston rings are plasma coatedIt gives added safety for the of new lines.A.running-inB

A.on both the external and internal top edges

B.on both the external top and bottom edges

C.on both the external and internal bottom edges

D.on all the four edges

A.the running-in period

B.the running process

C.gas exchange process

D.the boiler firing

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

A.Control the amount of lube oil burned in the combustion chamber

B.Transmit heat from the piston to the cylinder liner

C.Prevent damage to ring groove inserts by acting as a heat dam

D.Dissipate combustion chamber gas pressure by channeling it through the ring gap

Before replacing a piston you should check that all rings are ___.

A.free

B.fastened

C.broken

D.stuck

The function of the piston rings is to ________.

A help cool the piston by transferring heat from the piston to the cylinder wall

B provide a sliding seal between the piston and cylinder wall

C scrape oil off the cylinder wall as the piston moves down on the power and intake strokes.

D all of the above

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

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

The piston rings if found worn out _____ and supplied by shipchandler.

A.must replace

B.must to be equipped

C.has to be repaired

D.have to be renewed

The function of the piston compression rings used in a diesel engine is to _________.

A.seal the space between the piston and liner

B.transmit heat from the piston to the cylinder liner

C.reduce the amount of combustion gas blow-by

D.all of the above