Steamfitter Certificate of Qualification (CFQ) Practice Exam 2025 – All-in-One Resource to Ensure Exam Success! Flash Cards

Question: 1 / 825

What is the normal operating condition of a vacuum steam heating system?

?

Positive pressure in the mains, negative pressure in the returns

Next
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy