Hydraulic Excavator (HYEX) 12N Practice Test 2025 – Complete Exam Prep

Question: 1 / 400

Describe the function of the boom on an excavator.

It holds the bucket and swings it

It connects the stick to the house and extends the reach

The boom of an excavator serves as a vital structural component that connects the stick (or arm) to the machine's house (the cab and engine area). Its primary function is to extend the reach of the digging and lifting capabilities of the excavator. By allowing the stick to move further away from the excavator's body, the boom enables the operator to access areas that are difficult to reach while still maintaining control over the excavator's operations.

Additionally, the boom's ability to lift and lower the stick facilitates various tasks, such as digging, reaching into trenches, or loading materials, making it essential for the versatility and effectiveness of the excavator. Its design and operational range are crucial for maximizing the machine's efficiency on different job sites.

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It balances the machine on rough terrain

It adjusts the depth of the digging

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