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
您可能感興趣的試卷
你可能感興趣的試題
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 operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
The Master or person in charge of a ship shall ensure the crane record book shows the（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．
Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.
What is/are the advantage（s）of cranes over conventional cargo booms（）.
When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
On no account（）to be exceeded.
Which method should be used to warm up the pump turbines prior to discharge（）.
Running an electric winch at slow speed over a long period of time causes（）.
How should you signal the crane operator to lower the boom and raise the load（）.