A.adding small amounts of oil to the system
B.the system has been overheated
C.the system has been drained and then filled with new oil
D.the system has been idle for a long period of time
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A.permanent loss of pump suction
B.worn shaft seals
C.high level in the oil sump
D.low motor RPM
A.an improper rudder response
B.hammering noises in the equipment or transmission lines
C.popping or sputtering noises
D.all the above
A.clean the fittings before they are disconnected
B.Place drip pans under leaky fittings
C.Seal any cracks in lines with Permatex
D.Coat all threads with graphite oil
A.molecular fluid vibration
B.energy losses
C.wide pressure variations
D.mechanical damage to control valves
A.provide an area where air can separate from the oil
B.provide an area to separate solid contaminants from the oil
C.act as an oil and water separator
D.absorb shocks occurring in the system
最新試題
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
The condensers located in various stages of a flash evaporator are cooled by（）
Diesel engine air start system check valves are opened by （）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
If separating effect is not good, which measure should be taken （）
The shipboard oil pollution emergency plan will be invalid after （）
Using a file without a handle may result in （）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
Which of the following items don’t belong to dock repair works?（）