Question 634Deck General70% to pass
How should you signal the crane operator to stop in an emergency?
AI Explanation
The correct answer is D) Extend arm and move hand rapidly right and left with the palm down.
This is the correct answer because the standard hand signal for an emergency stop is to extend the arm out with the palm facing down, and then move the hand rapidly right and left. This is a clear, unambiguous signal that the crane operator can easily recognize as an emergency stop command.
The other answer options are incorrect because they do not match the standard emergency stop hand signal. Option A (extend arm with palm down) is part of the correct signal but does not include the rapid side-to-side motion. Options B (clasped hands) and C (fists with thumbs out) are not recognized crane operation hand signals.
Related Questions
#632 How should you signal the crane operator to lower the boom and raise the load? #633 The signal man assisting the crane operator has his forearm vertical, forefinger pointing up, and moves his hand in a small horizontal circle. This is the signal to #635 The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to _______________.#636 The signal man has both arms extended out, palms down, and is moving his arms back and forth. This is the signal for _______________.#637 The signal man assisting the crane operator has his arm extended, with the thumb pointing up, and is flexing his fingers in and out for as long as the load movement is desired. This is the signal to _______________.