Pedestal cranes have limit switches to restrict movement of which function(s)().
A、Hoist upper & lower limits
B、Luff travel limits
C、Rider block hoist upper & lower limits
D、All of the above
A、Hoist upper & lower limits
B、Luff travel limits
C、Rider block hoist upper & lower limits
D、All of the above
A、The cranes may be operated independently B、The cranes may be interconnected for twin operation C、When twinned,the crane rotation on the foundation assembly is unlimited D、All of the above
A、A.The cranes may be operated independently B、B.The cranes may be interconnected for twin operation C、C.The cranes are powered by independent internal combustion power units D、D.All of the above
A、Taglines are wire rope purchases that raise and lower the jib B、Taglines are wire ropes for horizontal positioning of the rider block C、Taglines can be fastened to corners of vehicles or containers D、The crane might not have taglines installed in its rigging system
A、Bunkering barge alongside B、Potable water spill on deck C、Crane hydraulic hose bursts D、Trim greater than 4 feet
A、It allows for rotation of the hook in the single mode B、It is required to“twin-up”30-ton pedestal cranes C、It is used to pick up light loads D、It is used to rigidly connect two cranes