OSHA 30 Hour Construction Program Practice Test

Which of the following is NOT one of the four classes of hard hats?

1. Class A

2. Class B

3. Class D

4. Class E

The correct answer is: Class D

The classification of hard hats is based on their ability to protect against different types of hazards. There are actually four primary classes of hard hats: Class A, Class B, Class C, and Class E. Class A hard hats provide protection against impact and penetration, but do not provide electrical protection. Class B hard hats are designed for use where there is a risk of high-voltage electrical hazards, offering higher voltage protection. Class C hard hats are intended for impact protection only and do not provide electrical insulation. Class D is not a recognized category in the standard classifications of hard hats, making it the correct response as the option that does not belong. Understanding these classifications is critical for workers on construction sites, as selecting the appropriate hard hat can be essential for their safety based on the specific hazards they may encounter.