A.facilitate bi-directional operation
B.provide the greatest pump efficiency
C.prevent pump clogging from marine growth
D.prevent cavitation at the pump outlet
您可能感興趣的試卷
你可能感興趣的試題
A.raw water pump discharge
B.expansion tank outlet
C.cooling water heat exchanger
D.outlet engine jacket water outlet
In a diesel engine, a cylinder liner should be replaced if it is ()
Ⅰ.Scuffed
Ⅱ.Scored
A.Ⅰ only is correct
B.Ⅱ only is correct
C.both Ⅰ and Ⅱ are correct
D.neither Ⅰ or Ⅱ are correct
A.metal particles loosened by wear
B.air when air cleaners are not used
C.condensation of water vapors
D.breakdown of the lubricating oil by dilution
A.reduce wear on the valve stem
B.permit the use of alloy valve seat materials
C.reduce heat transfer from the valve seat
D.facilitate valve removal for servicing
A.place standby cooler in operation
B.reduce engine load
C.check thermostatic valve
D.clean sea water strainer
最新試題
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()
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.
The ISPS Code consists of a mandatory section-Part A, which shows()
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is()
Diesel engine air start system check valves are opened by ()
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a()
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated()
()connectors hold best if a wire is accidentally pulled or a connection becomes loose.
During the diesel engine running, the water level of F.W expansion tank should normally kept in the () level of glass tube.
To shut down a diesel engine after it exceeds the set maximum speed,which type of device listed should be used?()