A.to use
B.to operate
C.maneuvering
D.using
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A.is the S.W.L. of the crane
B.are the S.W.L. of the crane
C.the S.W.L. of the crane is
D.the S.W.L.of the crane are
A.boom angle
B.boom strength
C.load radius
D.cable strength
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
最新試題
Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.
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 statement comparing a shipboard crane to conventional gear is TRUE（）.
Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
What is the purpose of the equalizing beam aboard a crane vessel（）.
What does “evel-luffing” accomplish during crane operations（）.
They（）loading at 1400 hours．
Sudden starts or stops of the boom is likely to cause all of the following except（）.