Question 633 Deck General

The correct answer is C) hoist. The hand signal described, with the forearm vertical, forefinger pointing up, and a small horizontal circular motion of the hand, is the standard signal used to indicate that the crane operator should hoist or raise the load. This signal is defined in the regulations and standards governing crane operations, such as those published by the Occupational Safety and Health Administration (OSHA). The other answer choices are incorrect because they represent different crane operation signals - "extend" for extending the boom, "lower" for lowering the load, and "swing" for rotating the crane. The specific hand signal provided in the question clearly indicates the "hoist" or "raise" command to the crane operator.