When a clarifier is running the impuri

1、Clean oil is achieved in a clarifier b

Clean oil is achieved in a clarifier bowl where the impurities and water collect at the bowl （）.AbottomBtopCcenterDperiphery

2、When the dock is refilled with water a

When the dock is refilled with water after docking repair, the first work which should be done by engineers is （）Aigniting boilerBreleasing air in sea water systemCstarting generatorDcut off shore power

3、In a diesel engine, when the fuel is i

In a diesel engine, when the fuel is injected into the cylinder,（）Athe piston is just coming upward from the bottom dead centerBthe piston h...

4、When a boiler is operating, the water

When a boiler is operating, the water level in the gauge glass reads （） when the boiler is shut down.Alower thanBhigher thanCas much asDthe same a

5、A tackle is “two blocked” when the blo

A tackle is “two blocked” when the blocks are（）.Aequally sharing the loadBjammed togetherCas far apart as possibleDrove to the highest mechanical advantage

6、When a vessel is in dry-dock, the vess

When a vessel is in dry-dock, the vessel’s engineers should （）.Aexamine the condition of the propellerBchip and paint all hull protection zincsCinstall new docking plugs in all cofferdamsDinspect the hull for hogging or sagging