【单选题】
When start a screw pump, the by pass valve should be （）.
A、closed
B、opened fully
C、cracked open
D、partly open
查看正确答案
A、Go ahead on both engines with the rudder hard to one side，if on a twin-screw vessel B、Back down with the rudder hard to one side，if on a single-screw vessel C、Take advantage of the tendency to back to port，if on a twin-screw vessel D、Turn so that the tendency to back into the wind can be used，if on a single-screw vessel
