A.oily water separator
B.sewage treatment plant
C.fuel oil separator
D.incinerator
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A.residual magnetism
B.voltage regulator
C.electrical current for excitation
D.the other running generator
A.the armature terminals of the motor should be connected in star formation when voltage of power supply is 380
B.the armature terminals of the motor should be connected in star formation when voltage of power supply is 220
C.both A and B are correct
D.the armature terminals of the motor should be connected in reverse ways of A and B
A.2
B.4
C.6
D.8
A.in such cases, the air supply is no longer optimal, the thermal load will be higher
B.governor hunting will occur
C.torsional vibrations as other mechanical vibrations may occur
D.all of the above are correct
A few spots of turbocharger can be caused by（）
①crash stop of engine
② rapid increased of engine speed
A.①only is correct
B.②only is correct
C.both ① and ②are correct
D.neither ① or ② correct
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The shipboard oil pollution emergency plan will be invalid after （）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
（） is not installed on the main switchboar.
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
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 diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
Which of the following items don’t belong to dock repair works?（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
Using a file without a handle may result in （）