单项选择题

The normal tendency for a loaded tanker is to（）.

A.hog
B.sag
C.have a permanent list
D.be very tender

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单项选择题
The maximum theoretical stress that can be developed on a guy in a yard and stay rig is limited by the（）.

A.lifting capacity of the winch
B.location of the boom
C.position of the guy
D.weight of the load
单项选择题
The load chart of a crane enables the operator to combine the load radius with boom length to determine the（）.

A.maximum counter weight required
B.minimum horsepower required
C.hoist rope strength
D.allowable load
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