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...
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Autor
Ran Chen, EA, CFP®
Kategoria
Strona podcastu
Ostatni odcinek
13 lis 2026
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Odcinki
NATE HVAC Exam Prep 37, Condensate Drain Installation 24.09.2026 3:34
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 negative pressure draw-through coils require a P-trap with...
NATE HVAC Exam Prep 36, Installation Wiring Controls and Protection 23.09.2026 3:43
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: - How to properly calculate wire gauge and breaker sizing using...
NATE HVAC Exam Prep 35, Duct Installation Sealing and Insulation 22.09.2026 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: - Duct layout transition slope limits and the critical role of t...
NATE HVAC Exam Prep 34, Installing Refrigerant Lines Correctly 21.09.2026 3:59
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: - How line sizing and pitch dictate proper oil return and preven...
NATE HVAC Exam Prep 33, Equipment Location Clearances and Service Access 20.09.2026 3:50
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 NATE exam questions test NEC 2023 Article 110.26 electrica...
NATE HVAC Exam Prep 32, Load Calculations Equipment Sizing and Matching 19.09.2026 3:17
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 rule-of-thumb square-footage sizing is strictly rejected o...
NATE HVAC Exam Prep 31, Pre Installation Planning and Documentation 18.09.2026 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 resolve conflicts between local building codes, project...
NATE HVAC Exam Prep 30, Air Balancing and Comfort Diagnostics 17.09.2026 3:47
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 systematically diagnose room-to-room comfort complaints...
NATE HVAC Exam Prep 29, Comfort Loads and Equipment Operation 16.09.2026 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: - The distinction between ACCA Manual J load calculations and AC...
NATE HVAC Exam Prep 28, Humidity Control and Condensation 15.09.2026 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: - How oversized cooling equipment leads to short-cycling and ele...
NATE HVAC Exam Prep 27, Ventilation and Outdoor Air 14.09.2026 4:10
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: - How outdoor air ventilation dilutes indoor contaminants accord...
NATE HVAC Exam Prep 26, Filtration and Indoor Air Quality 13.09.2026 4:03
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 distinction between particulate and gaseous contaminants a...
NATE HVAC Exam Prep 25, Blowers Fans and Performance Tables 12.09.2026 3:48
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: - Differences between forward-curved and backward-inclined fan b...
NATE HVAC Exam Prep 24, Duct Design Leakage and Distribution 11.09.2026 3:43
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: - How ACCA Manual D equivalent length and fitting friction impac...
NATE HVAC Exam Prep 23, Airflow CFM and Static Pressure 10.09.2026 3:45
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: - How to measure and calculate total external static pressure by...
NATE HVAC Exam Prep 22, Sensible Latent and Total Capacity 09.09.2026 2:56
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 differentiate sensible capacity from latent capacity an...
NATE HVAC Exam Prep 21, Psychrometric Properties of Air 08.09.2026 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: - Key difference between relative humidity and humidity ratio on...
NATE HVAC Exam Prep 20, Electrical Troubleshooting Sequence 07.09.2026 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: - How to apply the seven-step electrical troubleshooting sequenc...
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...
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