航海英语货物装卸货作业单项选择题每日一练(2018.11.29)

单项选择题
What is the principle behind dynamic braking as used on an anchor windlass?（）
A.Electrical loading
B.Mechanical distribution
C.Compressibility of air
D.Mechanical friction
单项选择题
The total quantity of oil discharge into the sea（）for existing tankers 1/15000 of the total quantity of the particular cargo or which the residue formed a part（）.
A.does not exceed
B.should exceed
C.should be up to
D.should be no more than
单项选择题
We’ll put off（）until Friday．
A.to discharge
B.discharge
C.discharging
D.to be discharging
单项选择题
Stop（）the derrick at once，the gooseneck is bent.
A.to use
B.to operate
C.maneuvering
D.using
单项选择题
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.
A.The cranes may be operated independently
B.The cranes may be interconnected for twin operation
C.When twinned，the crane rotation on the foundation assembly is unlimited
D.All of the above