A.increases as the cargo closes the head while hoisting
B.increases if the cargo runner is doubled up
C.decreases as the boom is topped to a greater angle
D.is determined by the thrust stresses on the boom
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A.provide safe electrical power connection to barge equipment
B.keep the vessel from surging excessively
C.prevent an accidental discharge of static electricity
D.secure the cargo hose to a hatch when loading overall
A.running rigging leading aft from the masts
B.running rigging leading forward from the masts
C.standing rigging leading aft from the masts
D.standing rigging from the cross trees to the mast head
A.including
B.besides
C.except
D.in addition to
A.hoisting cargo aboard a vessel
B.hoisting personnel aboard a vessel
C.securing a small boat to a large vessel
D.hoisting the anchor
A.slipway
B.graving dock
C.ground warp
D.caisson dock
最新試題
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.
When discharging an oil cargo，the first consideration is to（）.
The net productivity per gang-hour can be improved through a decrease of（）.
Official draft measurements should be（）by authorized persons，agreed by both parties involved.
Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.
Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．
When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
They（）loading at 1400 hours．
How should you signal the crane operator to move slowly（）.