单项选择题
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
On a ship crane，the load chart relates the allowable lo...
单项选择题On a ship crane，the load chart relates the allowable load to the combination of boom length and（）.
A.boom angle B.boom strength C.load radius D.cable strength
Oil product samples should be taken from the（）.A.dock r...
单项选择题Oil product samples should be taken from the（）.
A.dock riser B.ship's cargo tanks C.shore tank discharge D.All of the above
For any given pedestal crane，when the boom is lengthene...
单项选择题For any given pedestal crane，when the boom is lengthened，the lifting capacity is（）.
A.unchanged B.increased C.eliminated D.decreased
