A、winch speed
B、boom strength
C、load radius
D、cable strength
更多“When a cargo boom or crane is rated at varying capacities，there will be a table at the controls which relates safe working load to（）.”相关的问题
A、increases as the angle to the horizontal increases B、increases as the angle to the horizontal decreases C、is greatest at an angle of 45° and decreases as the boom is raised or lowered D、is least at an angle of 45° and increases as the boom is raised or lowered
A、only when the cargo is within its rail B、after the cargo is checked by tallymen C、as soon as the cargo loading or unloading begins D、during the time when loading or unloading is going on
A、only when the cargo is within its rail B、during the time when loading or unloading is going on C、after the cargo is checked by tallymen D、as soon as loading or discharging begins
A、only when the cargo is within its rail B、during the time when loading or ynloading is going on C、after the cargo is checked by tallymen D、as soon as loading or discharging begins
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、increases as the boom's angle to the horizontal increases B、is at a maximum when the boom is at a 45° angle to the horizontal C、increases as the boom's angle to the horizontal decreases D、decreases as the boom's angle to the horizontal decreases
A、Stopping the boom B、Topping or lowering the boom C、Moving the boom left or right D、All of the above
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