When start a screw pump, the by pass valve should be ____.A.closedB.opened fullyC.cracked

No sooner ______ than they started to repair the sludge pump.

The amount of fluid delivered by a reciprocating pump can be regulated by _____.

The pump has a constant stroke and the amount of fuel delivered is regulated by rotating _

Before starting a diesel engine that has an engine driven lube oil pump, the engineer shou

Your ship is dead in the water with the rudder amidships.As the right－handed screw starts

You may BEST turn a twin-screw vessel about，to the right，in a narrow channel by using ____