Red Seal Heavy Equipment Operator (Excavator) Practice Exam

Why is it important to lower attachments before turning off the engine?

1. To prevent machine theft

2. To comply with legal requirements

3. To ensure stability of the machine

4. To improve visibility

The correct answer is: To ensure stability of the machine

Lowering attachments before turning off the engine is crucial for the stability of the machine. When operating heavy equipment like excavators, having attachments raised can lead to an unbalanced condition. If the machine is left with attachments elevated, it increases the risk of tipping over or becoming unstable, especially if the ground is uneven or if there is any movement after the operator has left the machine. By lowering the attachments, the center of gravity is lowered, thus enhancing the overall stability of the machine when not in operation. Other considerations such as theft or visibility, although relevant to machine operation, do not directly relate to the immediate stability of the excavator. Compliance with legal requirements could be relevant, but the primary concern in this context is ensuring that the machine remains stable and safe when it is turned off.