To function properly, oil control rings used on a diesel engine piston must distribute sufficient oil to all parts of the cylinder wall and must also（）.
1、Oil control rings used in two-stroke/c
Oil control rings used in two-stroke/cycle diesel engines are located near the bottom of the piston skirt in order to （）Aincrease the liner ...
2、The film of oil between the rings and
The film of oil between the rings and the liner is not only essential for the lubrication but also plays an important part in achieving （）.Aan oil sealBremoving heatCa gas sealDcooling the pisto
3、The proper way to correct a mistake in
The proper way to correct a mistake in the logbook is to（）.Aerase the entry and rewriteBdraw several lines through the entry，rewrite，and ini...
4、What is a function of the wearing ring
What is a function of the wearing rings used in most centrifugal pumps?（）AAbsorb erosion of high velocity discharge streamBSeal pump shaft against entry of airCIsolate the discharge side from the suction sideDDampen the turbulent discharge flow
5、Worn out ring grooves should be （） to
Worn out ring grooves should be （） to standard dimension after being welded.AmachinedBboredChonedDdrilled
6、If you are guilty of failure to proper
If you are guilty of failure to properly perform your duties as Operator of Uninspected Towing Vessels，which of the following actions may NOT...