Podcast
Trades Exam Prep
Hosted by Ran Chen, EA, CFP® · EN
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 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 for everyone — from journeyman to master license, from apprentices to seasoned tradespeople. For free practice questions, AI-powered explanations, flashcards, and full study guides, visit https://open-exam-prep.com/ Subscribe and listen daily — your license is closer than you think.
53episodes
Episodes
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EPA 608 Prep 16, Type I — Small Appliances and the 5-Pound Limit
4d ago00:02:43Tap to summarizeThis 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: factory-manufactured, charged, and hermetically sealed with 5 pounds or less of refrigerant. - Why motor vehicle air conditioners (MVACs) are covered by Section 609 and are a common exam trap for Type I questions. - The specific refrigerant recovery requirements: 90% for a working compressor and 80% for an inoperative compressor. - What "hermetically sealed" means in an exam context and why it necessitates the use of piercing valves for service. - The unique rule allowing the Type I certification exam to be administered as an open-book test and the higher passing score required. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep
Transcribe →EPA 608 Prep 15, Reclaimers and EPA-Authorized Recycling
5d ago00:02:45Tap to summarizeThis 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 AHRI 700 standards for resale to a new owner. - Recycling is a less intensive cleaning process that allows refrigerant to be reused only in equipment belonging to the same owner. - The key exam distinction is change of ownership: reclaiming allows for resale, while recycling does not. - Following the 2020 ban on virgin R-22, reclaimed R-22 is the only legal supply for servicing older systems. - Exam questions use scenarios to test whether you can differentiate between situations requiring reclamation versus recycling. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep
Transcribe →EPA 608 Prep 14, Refrigerant Sales Restrictions and the Penalty Bounty
6d ago00:03:09Tap to summarizeThis 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 purchase refrigerants for stationary equipment. - The specific responsibilities of the seller to verify a technician's certification during a refrigerant sale. - The significant financial penalties for violating refrigerant sales laws, with fines up to $37,500 per day per violation. - How the EPA's bounty program works, offering up to a $10,000 reward for tips on violations. - Common exam traps, such as who receives the bounty and the specific exception for small cans of MVAC refrigerant. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep
Transcribe →EPA 608 Prep 13, Recordkeeping — What Technicians and Owners Must Document
1w ago00:03:12Tap to summarizeThis 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 handling activities. - Key documentation required from owners of appliances with 50 or more pounds of refrigerant. - The distinction between a technician's service invoice and an owner's comprehensive compliance log. - How to spot the common exam trick question about illegal "venting records." - A mnemonic, "I DATE QR," to recall the essential items a technician must document on a service record. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep
Transcribe →EPA 608 Prep 12, Leak Detection Methods — Bubble, Electronic, Ultraviolet, Nitrogen
1w ago00:03:44Tap to summarizeThis 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 detection methods: soap bubble, electronic, UV dye, and nitrogen. - Why you must only use dry nitrogen for pressure testing and the severe dangers of using oxygen or compressed air. - Common exam traps, such as how wind affects electronic detectors and the need for manufacturer approval for UV dyes. - The importance of calibrating electronic leak detectors and the proper technique for using them effectively. - A simple mnemonic, "Never Openly Add Air," to remember the critical safety rule for pressure testing with nitrogen. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep
Transcribe →EPA 608 Prep 11, Periodic Leak Inspections — When and How Often
1w ago00:02:39Tap to summarizeThis 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 periodic inspections for different appliance types. - How to distinguish between the quarterly and annual inspection schedules for commercial, IPR, and comfort cooling equipment. - The critical role of the 50-pound and 500-pound charge sizes in determining inspection frequency. - How a continuously monitored automatic leak detection system can eliminate the need for manual periodic inspections. - The 3-year recordkeeping requirement for all leak inspections and the owner's responsibility for maintaining these records. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep
Transcribe →EPA 608 Prep 10, Leak Repair Requirements and the 50-Pound Threshold
1w ago00:03:53Tap to summarizeThis 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 leak repair requirements for ozone-depleting substances. - The specific annual leak rate thresholds for comfort cooling (10%), commercial refrigeration (20%), and industrial process refrigeration (30%). - That owners have 30 days to complete repairs once a leak rate threshold is exceeded, including verification tests. - The crucial difference between being exempt from mandatory repair (under 50 lbs) and the universal illegality of venting refrigerant. - About the major rule change effective January 1, 2026, which lowers the threshold to 15 pounds for HFC refrigerants under the AIM Act. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep
Transcribe →EPA 608 Prep 9, Recover Before Opening — The 0 psi Rule
2w ago00:03:41Tap to summarizeThis 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. - Intentionally venting refrigerant is a federal crime under Section 608 of the Clean Air Act; never cut a charged line. - Understand the critical difference between 0 psig (atmospheric pressure) and a deep vacuum; the exam will test this distinction as a common trap. - For small appliances using system-dependent recovery, you must recover 90% of the charge (working compressor) or 80% (inoperative compressor), and may need to apply heat to reach the target. - Proper documentation of refrigerant recovery is required for appliance disposal, and new recovery cylinders must be evacuated before their first use. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep
Transcribe →EPA 608 Prep 8, Refrigerant Recovery Equipment — System-Dependent vs Self-Contained
2w ago00:03:35Tap to summarizeThis 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 own compressor and can be used on any size system. - For small appliances, recovery equipment must be able to capture 90% of the charge with a working compressor or 80% with a non-working one. - A common exam trap is applying the 80%/90% recovery percentages to large systems, which instead require specific vacuum levels. - An alternative to percentage-based recovery on small appliances is to pull a 4-inch mercury vacuum. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep
Transcribe →EPA 608 Prep 7, Recovery, Recycling, and Reclaim — Three Different Things
2w ago00:02:26Tap to summarizeThis 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 refrigerant and why it cannot be sold. - How reclamation processes used refrigerant to meet virgin product purity under AHRI Standard 700. - The exclusive role of an EPA-certified reclaimer in making used refrigerant legal for resale. - How to distinguish between exam question scenarios involving recycling versus reclaiming based on ownership and purity standards. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep
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