Ran Chen, EA, CFP®

Trades Exam Prep

Trades Exam Prep is a free, daily podcast by OpenExamPrep covering the most in-demand skilled trades licensing and certification exams — including EPA 608 (HVAC refrigerant), FAA Part 107 (drone), Master Electrician, Plumber, General Contractor, ASE automotive, NATE, OSHA 10/30, Welder Certification, and more. Each 5-minute episode breaks down one exam topic with concrete examples, common exam traps, code references, and field-ready memory tricks to help you pass on your first attempt. No fluff, no filler — just the concepts you need to know, explained the way the exam tests them. This podcast...

Koniecznie odwiedź stronę podcastu i wesprzyj twórcę: open-exam-prep.com

Autor

Ran Chen, EA, CFP®

Kategoria

Education

Strona podcastu

open-exam-prep.com

Ostatni odcinek

13 lis 2026

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Odcinki

EPA 608 Prep 27, Recovery of High-Pressure Refrigerants — Methods and Targets 05.08.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - To use the push-pull method for rapid liquid recovery from lar...

EPA 608 Prep 26, POE Oil and the Moisture Problem in R-410A Systems 04.08.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - Why R-410A systems mandate the use of synthetic POE (polyolest...

EPA 608 Prep 25, Why R-410A Cannot Replace R-22 in Older Systems 03.08.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - Why R-410A's operating pressure is 50-70% higher and poses a r...

EPA 608 Prep 24, Very High-Pressure Refrigerants — R-744 and Subcritical CO2 02.08.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - R-744 (CO2) is the primary very-high-pressure refrigerant on t...

EPA 608 Prep 23, Type II — High-Pressure Refrigerants (R-22, R-410A, R-407C) 01.08.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - That Type II certification covers high-pressure (R-22, R-410A)...

EPA 608 Prep 22, Small Appliance Refrigerants — R-134a, R-12, and Hydrocarbons 31.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The critical 1995 manufacturing year that distinguishes R-12 (...

EPA 608 Prep 21, Heating Recovery Cylinders and Safe Warm-Up Methods 30.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - Why heating a recovery cylinder creates a pressure differentia...

EPA 608 Prep 20, Recovery Cylinders and the 80 Percent Fill Rule 29.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - Recovery cylinders must never be filled beyond 80% of their ca...

EPA 608 Prep 19, Self-Contained Recovery on Small Appliances — the 90% Standard 28.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - Self-contained recovery machines must be certified to recover...

EPA 608 Prep 18, System-Dependent Recovery on Small Appliances — the 80% Standard 27.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - That system-dependent (passive) recovery is only permissible f...

EPA 608 Prep 17, Type I Open-Book Exam and the Passing Scores 26.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - That the EPA 608 Type I exam is the only section that can be a...

EPA 608 Prep 16, Type I — Small Appliances and the 5-Pound Limit 25.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The precise three-part definition of a Type I small appliance:...

EPA 608 Prep 15, Reclaimers and EPA-Authorized Recycling 24.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - Only EPA-certified reclaimers can purify used refrigerant to A...

EPA 608 Prep 14, Refrigerant Sales Restrictions and the Penalty Bounty 23.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - Why only EPA 608 certified technicians are legally allowed to...

EPA 608 Prep 13, Recordkeeping — What Technicians and Owners Must Document 22.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The mandatory 3-year record retention period for refrigerant h...

EPA 608 Prep 12, Leak Detection Methods — Bubble, Electronic, Ultraviolet, Nitrogen 21.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The specific applications and limitations of four primary leak...

EPA 608 Prep 11, Periodic Leak Inspections — When and How Often 20.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The specific leak rate thresholds that trigger mandatory perio...

EPA 608 Prep 10, Leak Repair Requirements and the 50-Pound Threshold 19.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The 50-pound charge threshold that triggers mandatory EPA 608...

EPA 608 Prep 9, Recover Before Opening — The 0 psi Rule 18.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - Before opening any high-pressure refrigerant system for servic...

EPA 608 Prep 8, Refrigerant Recovery Equipment — System-Dependent vs Self-Contained 17.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - System-dependent (passive) recovery uses the appliance's own c...

EPA 608 Prep 7, Recovery, Recycling, and Reclaim — Three Different Things 16.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The definition of refrigerant recovery as the simple removal a...

EPA 608 Prep 6, The Kigali Amendment and the HFC Phase-Down 15.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The Kigali Amendment targets high-GWP HFC refrigerants for the...

EPA 608 Prep 5, Ozone Depletion Potential (ODP) and Global Warming Potential (GWP) 14.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - How Ozone Depletion Potential (ODP) is measured against the ba...

EPA 608 Prep 4, CFC, HCFC, and HFC Refrigerants — What's the Difference 13.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The key chemical difference (the presence of chlorine and hydr...

EPA 608 Prep 3, The Montreal Protocol and the Ozone Layer 12.07.2026

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The direct link between the 1987 Montreal Protocol and the pha...

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