The main function of the drawworks on a ship is to（）.<br>A:transport tubulars from the pipe racks to the derrick floor<br>B:maintain constant tension on the marine riser<br>C:store and secure the excess drill line<br>D:lower and hoist the drill string into and out of the drilled hole

The main function of the drawworks on a ship is to（）.
A:transport tubulars from the pipe racks to the derrick floor
B:maintain constant tension on the marine riser
C:store and secure the excess drill line
D:lower and hoist the drill string into and out of the drilled hole

出自：海船船员证

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