Before starting an air compressor, It should be ().
A、unloaded
B、primed
C、filled with water
D、greased
A、unloaded
B、primed
C、filled with water
D、greased
A、maximum sustained vertical load an anchor will resist before dragging B、maximum sustained horizontal load an anchor will resist before dragging C、maximum sustained vertical load an anchor will resist before the mooring line breaks D、maximum sustained horizontal load an anchor will resist before the mooring line breaks
A、After operation, start the electric motor. B、Before operation, stop the electric motor. C、Before operation, start the electric motor. D、After operation, stop the electric motor.
A、check the flame arrester B、check the fuel tank C、check the battery D、ventilate the bilges