A.boom angle
B.boom strength
C.load radius
D.cable strength
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A.dock riser
B.ship's cargo tanks
C.shore tank discharge
D.All of the above
A.unchanged
B.increased
C.eliminated
D.decreased
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
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
最新試題
Sudden starts or stops of the boom is likely to cause all of the following except（）.
What does “evel-luffing” accomplish during crane operations（）.
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.
Which statement comparing a shipboard crane to conventional gear is TRUE（）.
What is the purpose of the equalizing beam aboard a crane vessel（）.
What is/are the advantage（s）of cranes over conventional cargo booms（）.
Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
Official draft measurements should be（）by authorized persons，agreed by both parties involved.
How should you signal the crane operator to lower the boom and raise the load（）.
Damage by（）shall not be considered as handling damage.