A.Lubrication systems using engine driven lube oil pumps do not require any additional independent arrangement when such arrangements have been proven reliable
B.The use of engine driven pre-lube pumps is permitted on vessels with propulsion systems developing less than 500 shaft horsepower
C.When forced lubrication is used for propulsion engines, one independently driven stand-by pumps is to be provided in addition to the necessary pumps for normal operation
D.Lubrication systems where two oil coolers are fitted require a minimum of two temperature control devices which may be actuated by similar sensors
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A.a broken shaft on the freshwater pump
B.an excessive accumulation of scale exchanger
C.an incorrect thermostatic element operating range
D.lube oil in the cooling water
A.varying the pump discharge pressure
B.varying the pump return pressure
C.rotation of the pump plunger
D.rotation of the pump barrel
A.accumulator spring compressor
B.balance piston
C.compensating needle valve
D.proportional piston
A.speed droop
B.compensation
C.idle speed setting
D.load limit control
A.Large misalignments can be tolerated between the shaft and engine coupling
B.Slip is held to a minimum when reversing shaft rotation
C.Engine torsion vibrations to the driven shaft are eliminated
D.It aids in maintaining power factor
最新試題
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The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.