Underwriters Laboratories and other recognized testing laboratories 'approve' products.

• A. True
• B. False
• C. They certify other markets
• D. They regulate installation standards

Answer: (B)

Labs like Underwriters Laboratories perform independent safety testing and evaluation to ensure a product meets established safety standards. When a product passes, the lab issues a listing or certification and applies a mark indicating compliance. This signals that the product has been tested and meets the standard, but it isn’t government approval of the product in general. They don’t regulate installation standards—installation is governed by building and electrical codes, with labs sometimes providing guidance but not overseeing installations. So, the statement isn’t accurate: these labs don’t “approve” products; they certify or list them as compliant with safety standards.