EPA 608 Type III · Refrigeration Fundamentals · Easy
Which of the following is considered a low-pressure refrigerant?
Answer: A. R-123.
- AR-123.✓ Correct
- BR-410A.
- CR-22.
- DR-134a.
Why A is right
HCFC-123 (R-123) is a standard low-pressure refrigerant used in centrifugal chillers.
More Type III questions
- Where is the rupture disc typically located on a low-pressure chiller?
- What is the primary purpose of a purge unit on a low-pressure centrifugal chiller system?
- Where does the purge unit take its suction from?
- What does frequent operation of the purge unit indicate?
- Why must low-pressure chillers be designed to be completely airtight?
Go deeper with the study guide EPA 608 Core Exam: Study Guide for 2026, try the free 10-question test or browse all EPA 608 practice questions.
A practice question written for study, checked against 40 CFR Part 82, Subpart F. It is not an official EPA exam question, and this site is not affiliated with the U.S. EPA.