Question 635Deck General70% to pass
The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to _______________.
AI Explanation
The correct answer is D) raise the boom.
The signal with the arm extended, fingers closed, and thumb pointing upward is the standard hand signal for "raise the boom" in crane operations, as specified in the Occupational Safety and Health Administration (OSHA) regulations for crane and derrick safety. This signal instructs the crane operator to raise the boom of the crane, which is the pivoting structural member that supports the hoisting mechanism and load.
The other answer choices are incorrect because they do not match the specific hand signal described. Checking the boom stop, raising the hook, and raising the boom and hook are different signals with distinct hand positions.
Related Questions
#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 #634 How should you signal the crane operator to stop in an emergency? #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 _______________.#638 The signal man assisting the crane operator has one hand occupied and one fist in front of his chest with the thumb pointing outward and is tapping his chest with the heel of his fist. This is the signal to _______________.