Type II — High-PressureQuestion 139 of 240
A technician sets up push-pull recovery on a system with a large liquid charge. How does the push-pull method work?
a.It uses shop air to push refrigerant into the cylinder
b.Vapor pushed in on top, liquid pulled out below
c.It relies solely on the system's compressor to move liquid
d.It pulls only vapor from both service ports at once
Explanation
In push-pull recovery, the recovery machine discharges vapor that pushes liquid refrigerant out of the appliance and pulls it into the recovery cylinder, moving a large liquid charge quickly. It is used only on systems with a substantial liquid charge, not on small ones. The method does not use shop air or rely on the system's own compressor.
This topic, taught in full in the EPA Section 608 Certification guide. EPA 608 Universal Study Guide (2026) — Core + Type I/II/III, with the 2027 A2L update — PDF + EPUB, $14.99 · 14-day refund →
Practice all 240 questions free — no signup required.
Own the complete EPA Section 608 Certification guide — PDF + EPUB, $14.99 →
Related questions on this topic
- A technician notices R-410A gauge pressures running much higher than an equivalent R-22 system at the same conditions. What does this reflect about R-410A?
- A technician plans to retrofit an old R-22 system to an HFC blend that uses polyolester (POE) oil. Which statement about the retrofit is correct?
- A technician handles a high-pressure refrigerant cylinder in a hot truck bed in summer. Which practice is safest for storing and transporting the cylinder?
- A very-high-pressure appliance using R-13 must have its refrigerant recovered before service. Using recovery equipment made after November 15, 1993, what is the required evacuation level?
- A technician measures 12°F of superheat on a fixed-orifice R-22 system but the manufacturer's chart calls for 20°F at those conditions. What does the low superheat suggest?
- During recovery from a Type II system, a technician sees noncondensable gases (air) collected in the recovery cylinder. What is the correct handling under Section 608?
Last reviewed: · editorial process
PrepPass team · Verified against EPA Section 608 Technician Certification Exam · How we review