Question 536General Subjects - Assistant Engineer

The correct answer is C) All motions are stopped by the loss of electric power to the crane. When the electric power supply to an electro-hydraulic cargo-handling pedestal-type deck crane is lost, the crane will immediately stop all motions, including slewing, hoisting, and luffing. This is a safety feature required by Coast Guard regulations to prevent uncontrolled or unintended movement of the crane in the event of a power failure. The other options are incorrect because they do not represent events that would immediately stop all crane motions. Limit switches and load cutout switches may stop specific motions, but a loss of electric power is the only event that would stop all crane movements simultaneously.