Question 638 Deck General

70% to pass

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 _______________.

A extend the boom

B hoist the boom

C retract the boom

D lower the boom

AI Explanation

The correct answer is C) retract the boom. The hand signal where the signalman has one hand occupied and the other fist is tapping their chest with the thumb pointing outward is the standard signal to indicate that the crane operator should retract the boom. This is a recognized hand signal in crane operations and is specified in various industry standards and regulations governing crane safety and signaling. The other answer choices are incorrect because they do not match the specific hand signal described. Extending, hoisting, or lowering the boom would have different corresponding hand signals.

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