A.length of the boom
B.angle of the boom
C.lifting capacity of the boom
D.direction of the boom
您可能感興趣的試卷
你可能感興趣的試題
A.to use
B.to operate
C.maneuvering
D.using
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
最新試題
The item（）is not the advantage of the hydraulic winch．
Most pedestal crane power is provided by（）.
When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
How should you signal the crane operator to lower the boom and raise the load（）.
If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor（）.
What is the purpose of the equalizing beam aboard a crane vessel（）.
When using slings，cargo handlers should take all the following precautions except（）.
What does “evel-luffing” accomplish during crane operations（）.
On no account（）to be exceeded.
The net productivity per gang-hour can be improved through a decrease of（）.