In crane terminology, which term describes the extension of the main boom?

In crane terminology, which term describes the extension of the main boom?

• A. Jib
• B. Counterweight
• C. Outrigger
• D. Hoist

Answer: (A)

The extension of the main boom is called the jib. The main boom reaches out to lift, and attaching a jib at its end provides additional horizontal reach, letting the crane place loads further away without moving the base. The jib can be fixed or adjustable and changes the load geometry, so operators must account for the longer moment and often adjust counterweights and boom angle to keep the crane stable. The other parts serve different roles: the counterweight balances the crane, outriggers stabilize it on the ground, and the hoist is the lifting mechanism itself.

The extension of the main boom is called the jib. The main boom reaches out to lift, and attaching a jib at its end provides additional horizontal reach, letting the crane place loads further away without moving the base. The jib can be fixed or adjustable and changes the load geometry, so operators must account for the longer moment and often adjust counterweights and boom angle to keep the crane stable. The other parts serve different roles: the counterweight balances the crane, outriggers stabilize it on the ground, and the hoist is the lifting mechanism itself.