Question 631Deck General70% to pass
How should you signal the crane operator to raise the boom?
AI Explanation
The correct answer is A) Extend arm with fingers closed and point thumb upward.
This hand signal is the standard and widely recognized signal for instructing a crane operator to raise the boom. It is specified in the International Code of Signals and the OSHA regulations for crane operations. Extending the arm with the thumb pointed upward provides a clear, unambiguous visual cue to the crane operator to lift the boom.
The other answer choices describe different hand signals that are not the accepted standard for directing a crane operator to raise the boom. These alternative signals could lead to confusion or misinterpretation, which could result in unsafe crane operations.
Related Questions
#629 How should you signal the crane operator to dog everything? #630 How should you signal the crane operator to lower the boom? #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 #634 How should you signal the crane operator to stop in an emergency?