Engineering Knowladge General Objective

1) The shaft coupling for the pump is prevented from rotating on the shaft by a ____________.

a)lacing wire
c)set screw
d)lock washer

ans:- B

2)  Tubing is sized by _______________________.

a)allowed working pressure
b)cross-section area
c)nominal inside diameter
d)nominal outside diameter


3) Short cycling of a refrigeration compressor refers to

a)frequently grounding out
b)requently starting and stopping
c)running too fast
d)running too slow


4) The emergency bilge suction valve is typically used _____________.

a)to inject cleaning additives when the bilges are extremely dirty
b)when the main condenser becomes fouled, in order to provide additional cooling water circulation
c)to connect the rose box to the independent bilge suction
d)if the bilges become flooded and they can not be emptied by any other means


5)The by-products of oxidation, as a result of water contamination of hydraulic oil, are generally ____________.

a)removed by cellulose type filters
b)gums, varnishes, and acids
c)always neutralized by oil additives
d)harmless and have no effect on system components


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