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PODCAST

Trades Exam Prep

Ran Chen, EA, CFP®

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

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All Episodes

03:41

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

Trades Exam Prep ·

2026/07/18

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: - Before opening any high-pressure refrigerant system for service or disposal, you must recover the refrigerant until the pressure reaches a minimum of 0 psig. -

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03:35

EPA 608 Prep 8, Refrigerant Recovery Equipment —...

Trades Exam Prep ·

2026/07/17

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: - System-dependent (passive) recovery uses the appliance's own compressor and is only for small appliances (15 lbs or less). - Self-contained (active) recovery has its

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02:26

EPA 608 Prep 7, Recovery, Recycling, and Reclaim —...

Trades Exam Prep ·

2026/07/16

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 and storage of refrigerant from a system. - The critical "same-owner" rule for using recycled

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03:24

EPA 608 Prep 6, The Kigali Amendment and the HFC...

Trades Exam Prep ·

2026/07/15

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: - The Kigali Amendment targets high-GWP HFC refrigerants for their climate impact, not ozone depletion. - The U.S. implements the HFC phase-down through the American

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03:39

EPA 608 Prep 5, Ozone Depletion Potential (ODP) and...

Trades Exam Prep ·

2026/07/14

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: - How Ozone Depletion Potential (ODP) is measured against the baseline refrigerant R-11 and is driven by chlorine content. - How Global Warming Potential (GWP) is

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04:32

EPA 608 Prep 4, CFC, HCFC, and HFC Refrigerants —...

Trades Exam Prep ·

2026/07/13

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 hydrogen) that defines CFCs, HCFCs, and HFCs. - Why CFCs have the highest Ozone Depletion Potential (ODP)

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03:40

EPA 608 Prep 3, The Montreal Protocol and the Ozone...

Trades Exam Prep ·

2026/07/12

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 direct link between the 1987 Montreal Protocol and the phasing out of ozone-depleting CFCs and HCFCs. - How a single chlorine atom from refrigerants can destroy

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03:52

EPA 608 Prep 2, The Four Certification Types — Type...

Trades Exam Prep ·

2026/07/11

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: - Type I certification is strictly for small appliances containing 5 pounds or less of refrigerant that are also hermetically sealed in a factory. - Type II

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03:03

EPA 608 Prep 1, Who Needs a Section 608 Certification

Trades Exam Prep ·

2026/07/10

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: - Anyone who maintains, services, repairs, or disposes of appliances with regulated refrigerants (CFCs, HCFCs, HFCs) must hold an EPA 608 certification. - An

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03:12

FAA Part 107 Drone Exam Prep 50, Detect and Avoid...

Trades Exam Prep ·

2026/06/17

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: - What Detect and Avoid (DAA) technology is and its foundational role in drone operations. - Why DAA is a mandatory component for obtaining a Beyond Visual Line of

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02:55

FAA Part 107 Drone Exam Prep 49, Standard Remote ID...

Trades Exam Prep ·

2026/06/16

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: - Standard Remote ID is built into a drone and broadcasts the control station's live, dynamic location. - A Remote ID Broadcast Module is an add-on for older drones

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02:57

FAA Part 107 Drone Exam Prep 48, Night Vision...

Trades Exam Prep ·

2026/06/15

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: - The autokinetic effect is when a stationary light appears to move; mitigate it by continuously scanning the sky and not fixating on the light. - Recognize night

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03:46

FAA Part 107 Drone Exam Prep 47, Night Operations —...

Trades Exam Prep ·

2026/06/14

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: - Anti-collision lights are mandatory for all drone operations during civil twilight and at night, as per 14 CFR Part 107.29. - The lights must be visible for a

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03:21

FAA Part 107 Drone Exam Prep 46, Vision and Scanning...

Trades Exam Prep ·

2026/06/13

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 FAA-approved method for systematically scanning the sky in 10-degree segments. - How empty field myopia creates a hazard by causing your eyes to lose focus at a

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03:49

FAA Part 107 Drone Exam Prep 45, Physiology —...

Trades Exam Prep ·

2026/06/12

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: - Why hypoxia symptoms are tested on the Part 107 exam, even though drone pilots operate from the ground. - How to differentiate between the nearly identical symptoms

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03:18

FAA Part 107 Drone Exam Prep 44, Emergency Procedures...

Trades Exam Prep ·

2026/06/11

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: - A flyaway is an unresponsive drone; the first action is to switch to ATTI mode to attempt to regain manual control. - A lost link is a communication failure where

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03:11

FAA Part 107 Drone Exam Prep 43, Lost Link Procedures...

Trades Exam Prep ·

2026/06/10

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: - A "lost link" is the loss of the command-and-control signal, and your pre-programmed failsafe setting determines the drone's action. - The three common failsafe

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02:44

FAA Part 107 Drone Exam Prep 42, Right of Way Rules —...

Trades Exam Prep ·

2026/06/09

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 a small unmanned aircraft must always yield right-of-way to all other aircraft under FAA Part 107.37. - The absolute responsibility of the Remote Pilot in

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04:11

FAA Part 107 Drone Exam Prep 41, Crew Resource...

Trades Exam Prep ·

2026/06/08

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 Crew Resource Management (CRM) applies even to solo pilots through the effective use of resources like checklists and weather apps. - The Remote Pilot in

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03:51

FAA Part 107 Drone Exam Prep 40, IMSAFE Personal...

Trades Exam Prep ·

2026/06/07

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: - The specific meaning of each letter in the IMSAFE checklist: Illness, Medication, Stress, Alcohol, Fatigue, and Emotion. - The FAA's strict "8-hour

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