單項(xiàng)選擇題

When installing a hydraulic hose, which of the following precautions should be taken?（）

A.The hose should not be twisted
B.The hose should be protected with a sleeve if it is subjected to rubbing
C.There should be some slack in the hose
D.All of the above

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單項(xiàng)選擇題

A lube oil filter can be used to remove most contaminants from lube oilA contaminant which will remain in the lube oil after filtering is （）.

A.acid
B.fuel oil
C.sediment
D.water

單項(xiàng)選擇題

Which pump installation would require an external source of sealing water?（）

A.Main circulator pump jacket water cooling
B.Salt water service pump
C.Auxiliary condensate pump
D.Bilge pump