Ran Chen, EA, CFP®

Trades Exam Prep

Education EN ↓ 134 afleveringen

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...

Bezoek zeker de website van de podcast en steun de maker: open-exam-prep.com

Auteur

Ran Chen, EA, CFP®

Categorie

Education

Website van de podcast

open-exam-prep.com

Nieuwste aflevering

1 okt. 2026

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Afleveringen

EPA 608 Prep 34, How the EPA 608 Exam Is Structured and Scored 12.08.2026 2:57

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 EPA 608 exam consists of four independent 25-question sect...

EPA 608 Prep 33, Universal Certification — What It Covers and Scoring 11.08.2026 3:42

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 Universal Certification is earned by passing the Core, Ty...

EPA 608 Prep 32, Charging and Breaking the Vacuum on Low-Pressure Systems 10.08.2026 2:54

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 you must always break the vacuum on a low-pressure chiller...

EPA 608 Prep 31, Recovery of Low-Pressure Refrigerants — Recovery Units and Order 09.08.2026 3:04

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 a dedicated recovery unit with a 10 psig high-pressure cut...

EPA 608 Prep 30, The Purge Unit — Removing Non-Condensables from Chillers 08.08.2026 3:12

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 purge units are required on low-pressure chillers because...

EPA 608 Prep 29, Operating in a Vacuum — How Low-Pressure Systems Pull in Air 07.08.2026 2:48

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 leaks in low-pressure chillers draw air and moisture INTO...

EPA 608 Prep 28, Type III — Low-Pressure Refrigerants and Centrifugal Chillers 06.08.2026 3:15

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 to identify Type III appliances and their associated low-p...

EPA 608 Prep 27, Recovery of High-Pressure Refrigerants — Methods and Targets 05.08.2026 3:18

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 3:28

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 3:07

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 3:18

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 2:49

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 2:59

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 4:17

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 2:31

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 3:14

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 3:28

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 2:43

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 2:43

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 2:45

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 3:09

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 3:12

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 3:44

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 2:39

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 3:53

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...