单项选择题
Cargo handling unit is rated according to the （） to be lifted.
A.cargo crane
B.jib
C.safe working load
D.oil pressure
点击查看答案&解析
相关考题
-
单项选择题
When the union purchase derrick is operated, one derrick is positioned over the quayside and the other almost vertically over the （）.
A.dock
B.hold
C.pedestal
D.machinery space -
单项选择题
In a general cargo crane, （） is fitted to lift the cargo load.
A.the slewing motor
B.the luffing motor
C.the hoisting motor
D.none of the above -
单项选择题
The crane is usually mounted on a pedestal to offer adequate （） to the operator.
A.time
B.space
C.length
D.visibility
