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 the PSCO has clear grounds for carrying out a more detailed inspection,（）

A、the master should be immediately informed

B、the master will be prohibited from contacting the Administration or other organization

C、he will carry out the inspection after the master be informed and be ready

D、he will carry out the inspection without informing the master

When start a screw pump, the by pass valve should be （）.

A、closed

B、opened fully

C、cracked open

D、partly open

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

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

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