航海英语水手工艺单项选择题每日一练(2017.12.11)

单项选择题
A term used to describe the dip in a towline that acts as a shock absorber is（）.
A.catenary
B.step
C.shock dip
D.bight
单项选择题
Right-laid line should be coiled（）.
A.clockwise
B.counterclockwise
C.either clockwise or counterclockwise
D.on a reel
单项选择题
It’s no good（）down by head．
A.to sail
B.sails
C.sailing
D.sailed
单项选择题
When checking a mooring line，you should（）.
A.ensure the bight is not fouled between the ship and the dock by taking up slack
B.pay out slack smartly and keep free for running
C.secure more turns to hold the line against any strain，then clear the area
D.surge the line so that it maintains a strain without parting
单项选择题
The locking pin that joins the parts of a detachable link is held in position by（）.
A.a tack weld
B.the self-locking characteristics of its taper
C.a cotter pin
D.a lead plug