Question

what crane device limits the angle of the boom at its highest position? select the best option

block

boom stop

jib

if you need to review this content, it can be found in the introduction module of the cranes topic

Explanation:

To solve this, we analyze each option:

• Wheel: A wheel's motion is rotational, not directly limiting the boom's angle at its highest position.
• Boom stop: A boom stop is a mechanical component designed to restrict the boom’s movement (including its angle) at extreme positions (like the highest point) to prevent over - extension or damage.
• Jib: The jib is an arm extending from the boom, mainly for lifting or positioning loads, not for limiting the boom’s angle at its highest position.

Answer:

B. boom stop