Michigan Residential Builders License Practice Test

What is the maximum air pressure allowed at the discharge end of a portable air gun or hose for cleaning?

1. 50 psi

2. 20 psi

3. 30 psi

4. 40 psi

The correct answer is: 30 psi

The correct answer is based on safety regulations regarding the use of portable air guns or hoses. For cleaning purposes, the maximum air pressure allowed at the discharge end is established to prevent injury and ensure safe operation. A limit of 30 psi is set to minimize the risk of dust and debris being blown into the operator's face and to prevent projects from becoming hazardous. Higher pressures can lead to increased risk of injury especially to the eyes, skin, and even lungs when inhaled or when cleaning around fragile surfaces. This regulation helps maintain a safer working environment. Understanding this regulation is crucial for anyone handling compressed air equipment in construction or maintenance tasks. Compliance with this limit is not just a best practice but is often mandated by safety standards and regulations for workplaces.