A.clogged lube oil piping
B.excessive valve-guide clearance
C.high lube oil viscosity
D.low lube oil temperature
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A.backfire through the air intakes
B.develop less power under load
C.have high firing pressures
D.lift its cylinder relief valves
A.excessively high oil temperatures
B.water or moisture contamination
C.fuel dilution
D.life its cylinder relief vales
In a diesel engine, when refitting piston rings you should （）
Ⅰ.check the ring gap at the smallest diameter of the cylinder
Ⅱ. Remove carbon from the ring groove
A.Ⅰ only
B.Ⅱ only
C.both Ⅰ and Ⅱ
D.neither Ⅰ nor Ⅱ
In a diesel engine, an integral liner is one in which the cooling water （）
Ⅰ.flows through the cylinder liner jackets
Ⅱ.touches the outer side of the liner
A.Ⅰ only
B.Ⅱ only
C.both Ⅰ and Ⅱ
D.neither Ⅰ and Ⅱ
A.piston rings
B.valve guides
C.valve seals
D.all of the above
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For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
The main purpose of port State control is not to（）
Diesel engine air start system check valves are opened by （）
To proceed to the assistance of a ship in distress is（）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）