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

NATE HVAC Exam Prep 19, Electrical Meter Testing in HVAC Systems 06.09.2026 4:15

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 apply the Live-Dead-Live verification protocol before t...

NATE HVAC Exam Prep 18, Reading Schematics and Wiring Diagrams 05.09.2026 4:18

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: - How schematics represent all switches and contacts in their de...

NATE HVAC Exam Prep 17, Thermostats and HVAC Control Logic 04.09.2026 4:09

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: - Core 24-volt thermostat terminal assignments for R, C, W, Y, a...

NATE HVAC Exam Prep 16, Relays Contactors Sequencers and Safeties 03.09.2026 4:26

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: - Distinction between relays, contactors, and sequencers in HVAC...

NATE HVAC Exam Prep 15, Transformers and Low Voltage Control Power 02.09.2026 4:13

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: - How to calculate maximum secondary amperage using transformer...

NATE HVAC Exam Prep 14, Motors Capacitors and Starting Circuits 01.09.2026 4:32

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: - Key operational differences between shaded-pole, PSC, and ECM...

NATE HVAC Exam Prep 13, Alternating Current Inductance and Power Factor 31.08.2026 4:42

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: - How frequency and inductance create counter electromotive forc...

NATE HVAC Exam Prep 12, Series and Parallel HVAC Circuits 30.08.2026 4:05

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: - Voltage drop rules for closed versus open switches in series c...

NATE HVAC Exam Prep 11, Voltage Current Resistance and Power 29.08.2026 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: - How to apply Ohm's Law and Watt's Law to calculate voltage, cu...

NATE HVAC Exam Prep 10, HVAC Fundamentals Calculations and Exam Traps 28.08.2026 3:30

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 correctly convert temperature between Fahrenheit, Celsi...

NATE HVAC Exam Prep 9, Combustion Venting and Carbon Monoxide Safety 27.08.2026 4:14

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: - Key differences between complete and incomplete combustion and...

NATE HVAC Exam Prep 8, Refrigerant Piping Oil Return and Line Protection 26.08.2026 3:38

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: - Suction line velocity requirements to ensure proper oil return...

NATE HVAC Exam Prep 7, Superheat and Subcooling Fundamentals 25.08.2026 3:46

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 calculate evaporator superheat, total superheat, and co...

NATE HVAC Exam Prep 6, Pressure Temperature Relationships and Saturation 24.08.2026 4:22

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 saturation temperature, boiling, and condensing function a...

NATE HVAC Exam Prep 5, The Refrigeration Cycle and Component Roles 23.08.2026 3:10

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: - Tracing refrigerant temperature, pressure, and phase changes t...

NATE HVAC Exam Prep 4, Heat Transfer BTUs and System Capacity 22.08.2026 3:55

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: - Differentiation between conduction, convection, and radiation...

NATE HVAC Exam Prep 3, HVAC Tools and Measurement Accuracy 21.08.2026 2:58

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: - CAT rating requirements and meter safety protocols for NATE ce...

NATE HVAC Exam Prep 2, Jobsite Safety PPE and Hazard Control 20.08.2026 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: - How OSHA 1910.147 lockout and tagout procedures require testin...

NATE HVAC Exam Prep 1, Understanding the CHP-5 Certification Path 19.08.2026 3:37

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: - Five separate 30-question modules that make up the NATE CHP-5...

EPA 608 Prep 40, Exam Day Strategy — Common Traps and High-Yield Topics 18.08.2026 4:06

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: - Key recovery efficiency numbers (90% active vs. 80% passive) a...

EPA 608 Prep 39, Oil Recovery and Acid Tests — Compressor Health 17.08.2026 3:20

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: - Understand that recovered refrigerant oil is regulated waste a...

EPA 608 Prep 38, Brazing and System Opening — Recover First, Always 16.08.2026 3:33

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: - Always recover refrigerant to 0 psig before applying heat or o...

EPA 608 Prep 37, Evacuation and Deep Vacuum — Microns and Moisture Removal 15.08.2026 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: - A micron gauge, not a manifold gauge, is required to measure a...

EPA 608 Prep 36, The R-22 Phaseout and the AIM Act HFC Phase-Down 14.08.2026 3:19

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 difference between the R-22 phaseout (for ozone,...

EPA 608 Prep 35, Refrigerant Safety — Asphyxiation, Frostbite, and Toxic Decomposition 13.08.2026 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 refrigerants, being heavier than air, create a significant...