Massachusetts Wastewater Practice Exam

What is a lockout procedure designed to ensure?

1. That the building doors remain locked during operations

2. That equipment remains de-energized during maintenance

3. That all safety protocols are followed strictly

4. That ventilation systems are not tampered with

The correct answer is: That equipment remains de-energized during maintenance

A lockout procedure is designed to ensure that equipment remains de-energized during maintenance. This critical safety process involves isolating the energy sources of machinery or equipment to prevent accidental start-up or release of stored energy while maintenance work is being performed. By implementing lockout procedures, workers are safeguarded from electrical hazards, mechanical failures, or any unforeseen releases of energy that could result in injuries. Effectively, it mandates that a physical lock be applied to equipment controls, ensuring that only authorized personnel can remove the lock and restore power once maintenance is complete. The other options, while related to safety and operational protocols, do not accurately capture the primary focus of a lockout procedure. For example, ensuring that the building doors remain locked during operations addresses security, which is distinct from equipment safety. Additionally, while adherence to safety protocols is vital in any workplace, the lockout procedure specifically targets the isolation of energy sources. Finally, although preventing tampering with ventilation systems may involve safety considerations, it is not the primary aim of the lockout procedure, which is specifically related to energy control.