NCCER Introduction to Basic Rigging questions with correct answers

During a rigging operation if an emergency happens who has the authority to give the emergency stop hand signal? CORRECT ANSWER Anyone on the ground who is in sight of the crane operator The recommendation when lifting a load higher than __________ is to use two choker hitches. CORRECT ANSWER 12 feet A hand-operated winching device that should never be used for vertical overhead lifting is a _____ CORRECT ANSWER come-along All chain hoists use a ____________ to lift heavy loads. CORRECT ANSWER gear systems A _____________ is used on alloy steel chain slings. CORRECT ANSWER Grab Hook Shackles for most overhead lifting are made of _________ due to the need for increased toughness. CORRECT ANSWER forged steel When a wire rope sling appears to be damaged, who makes the decision to keep it in service a _________ CORRECT ANSWER competent person The temperatures that most alloy steel chain slings can be used in are up to ______________ CORRECT ANSWER 500F or 260C