During the watch at sea, where situations occur in the machine apace which may affect the speed maneuverability, power supply or other essentials for the safe operation of the ship（）should be informed as soon as possible.

A、the chief engineer

B、the master

C、the bridge

D、the company superintendent

The piston crown employs the usual jet-shaker principle with an arrangement of cooling bores in the crown so that the surface temperatures of the crown are moderate with a very even distribution（）

A、water cooling

B、oil cooling

C、air cooling

D、combined cooling

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

A fire is considered "under control" when （）.

A、all hands are at their fire stations

B、all fire-fighting equipment is at the scene

C、the fixed systems are activated

D、the fire is contained and no longer spreading

An ohmmeter can be used to measure（）

A、current flow in a circuit

B、voltage between two points in a circuit

C、circuit continuity

D、power

If two AC 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