Non-metallic ducts shall have a flame spread index of 25 or less and a smoke-developed index of 50 or less.

Prepare for the Sheet Metal Journeyman Test with comprehensive study tools including flashcards, multiple choice questions, and detailed explanations. Master the test content and ensure your success!

Multiple Choice

Non-metallic ducts shall have a flame spread index of 25 or less and a smoke-developed index of 50 or less.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy