In the voyage, duty officer should inform （） situation to the duty engineer immediately.
A、in/ut port
B、passing through big bridge
C、big steering angle for direction changing
D、in/out port and passing through big bridge
When start a screw pump, the by pass valve should be （）.
A、closed
B、opened fully
C、cracked open
D、partly open
Modern centrifuge designs enable continuous over a considerable period of timeThis is achieved by which is timed to discharge the sludge at regular intervals（）
A、an injection process
B、an ejection process
C、a separation process
D、a heating process
Which of the routine maintenance procedures listed is required for starting air receivers?（）
A、over-speeding
B、overload
C、low exhaust temperature
D、high crankcase pressure
Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinderIf the cooling water temperature from all cylinders begins to rise above normal, you should suspect （）
A、increase blow-by in all cylinders
B、incomplete combustion in all cylinder
C、overloading in all cylinders
D、insufficient fuel delivery to all cylinders
Any carbon built up on surfaces must be washed away by （） additives and held in suspension by a （） additive.
A、dispersant；detergent
B、detergent；dispersant
C、dispersant；dispersant
D、detergent；detergent
