A jib that must be pinned in place and cannot be adjusted while under load is called a _____.

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Multiple Choice

A jib that must be pinned in place and cannot be adjusted while under load is called a _____.

Explanation:
The main idea is that some jib designs are fixed and cannot be adjusted once the load is on the hook. A fixed jib is a rigid arm that stays at one length and angle, pinned in place, with no mechanism to move or extend it while the crane is lifting. Because there’s no ability to change its position under load, it must be set and locked before lifting, making adjustments while the load is on the hook impossible and unsafe. Other jib types—luffing, swing, and telescoping—provide some form of adjustment (angle, rotation, or length), which is why they are not appropriate for a setup that must remain unchanged under load.

The main idea is that some jib designs are fixed and cannot be adjusted once the load is on the hook. A fixed jib is a rigid arm that stays at one length and angle, pinned in place, with no mechanism to move or extend it while the crane is lifting. Because there’s no ability to change its position under load, it must be set and locked before lifting, making adjustments while the load is on the hook impossible and unsafe. Other jib types—luffing, swing, and telescoping—provide some form of adjustment (angle, rotation, or length), which is why they are not appropriate for a setup that must remain unchanged under load.

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