Final answer:
ANSI recognizes Type I and Type II hard hats for safety use in construction and industrial settings. A Type III hard hat is NOT ANSI approved as this classification does not exist within the ANSI standards. The correct answer is option a) Type I hard hat and b) Type II hard hat.
Step-by-step explanation:
The question concerns the types of hard hats that are approved by ANSI for safety use in construction and industrial settings. According to the American National Standards Institute (ANSI), there are two main types of hard hats that are recognized for safety: Type I and Type II. Type I hard hats are designed to protect the top of the head, while Type II hard hats provide protection to both the top and sides of the head.
There is no ANSI designation for a Type III or Type IV hard hat; thus, option c) Type III hard hat and option d) Type IV hard hat are not ANSI-approved for safety use in such settings. Among the provided options, the correct answer is that a Type III hard hat is NOT ANSI approved, as it does not exist within the ANSI classification system. The correct answer is option a) Type I hard hat and b) Type II hard hat.