单项选择题
A.prevent an unsafe ship proceeding to sea B.prevent a ship threatening the marine environment C.fine the ships D.confirm a safe sailing
If two A.C.generators are to be operated in parallel, t...
单项选择题If two A.C.generators are to be operated in parallel, the load is distributed evenly by()
A.means of rheostat the governor settings B.a balance coil excitation C.adjusting the governor settings D.changing excitation
The treatment of the fuel oils involves storage, heatin...
单项选择题The treatment of the fuel oils involves storage, heating, filtering and()
A.centrifuging B.pressurizing C.atomization D.igniting
Which of the following items don’t belong to dock repai...
单项选择题Which of the following items don’t belong to dock repair works?()
A.making the repair list, booking spare parts and special tools for the dock repair B.shutting off all of the S.W valves to outboard C.the sketches or diagrams used for the dock repair D.cleaning up the oil tank and boiler before enter the dock