エピソード

  • [ACS CCN1] 13, Vent Free Area, Grilles, and Ducts

    [ACS CCN1] 13, Vent Free Area, Grilles, and Ducts
    2026/08/29
    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: - Difference between gross frame dimensions and effective free area under BS 5440-2 - Aperture sizing rules including the 5 mm and 10 mm sphere entry test - Prohibition of fly screens and closable hit-and-miss vents on gas ventilation - Sizing rules for air bricks, wall cavity ducts, and transfer grilles across airflow paths - Key ACS CCN1 exam traps and the FREE mental shortcut for ventilation questions 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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    4 分
  • [ACS CCN1] 12, Ventilation Principles and Air Supply

    [ACS CCN1] 12, Ventilation Principles and Air Supply
    2026/08/28
    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: - How combustion air, cooling air, compartment ventilation, and purge ventilation differ under BS 5440 Part 2 - Why open-flued, room-sealed, and flueless gas appliances require distinct ventilation strategies - The impact of property age and air-tightness on adventitious air allowances for ACS CCN1 calculations - Why an openable window satisfies purge ventilation but can never replace permanent purpose-provided ventilation - Why appliance input rating alone is insufficient to determine total ventilation requirements without manufacturer instructions and site factors 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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    4 分
  • [ACS CCN1] 11, Combustion Sampling, Ratios, and Action Levels

    [ACS CCN1] 11, Combustion Sampling, Ratios, and Action Levels
    2026/08/27
    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 set up, zero, and position an electronic portable combustion gas analyser during ACS CCN1 practical assessments. - The procedure for obtaining steady combustion readings at maximum firing rate and accounting for new component burn-off. - Why manufacturer instructions always take precedence over the default BS 7967 benchmark ratio of 0.0040. - How to classify unrectified high CO/CO2 ratios under the Gas Industry Unsafe Situations Procedure as At Risk or Immediately Dangerous. - Key exam traps regarding probe depth, stabilization times, customer refusal procedures, and safety notices. 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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    4 分
  • [ACS CCN1] 10, Combustion Performance Analyser Checks and Setup

    [ACS CCN1] 10, Combustion Performance Analyser Checks and Setup
    2026/08/26
    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: - How to perform mandatory combustion analyser pre-checks including BS EN 50379-3 compliance, filter checks, water trap clearance, and annual calibration verification. - Why clean air zeroing outside of contaminated combustion areas is required to prevent false CO baseline errors during practical testing. - The critical necessity of checking burner operating pressure or gas rate before obtaining flue gas samples to avoid distorted CO and CO2 ratios. - How to position the sampling probe to identify peak steady CO2 or lowest steady O2 levels in accordance with BS 7967 and manufacturer instructions. - Key action thresholds for CO and CO2 ratio limits and applying the ZERO mnemonic for flawless setup on the ACS CCN1 assessment. 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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    4 分
  • [ACS CCN1] 9, Carbon Monoxide, Carbon Dioxide, Symptoms, and Alarms

    [ACS CCN1] 9, Carbon Monoxide, Carbon Dioxide, Symptoms, and Alarms
    2026/08/25
    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: - Physical properties and health hazards of carbon monoxide and carbon dioxide in gas safety. - Typical clinical symptoms of CO exposure and how to distinguish them from common flu symptoms. - The fundamental standard differences between ambient CO alarms (BS EN 50291) and combustion analysers (BS EN 50379). - Precise positioning rules under BS EN 50292 and regional regulatory differences across Scotland, England, Wales, and Northern Ireland. - Emergency protocol advice for CO alarm activations and the 'One to Three, Three Hundred, One Fifty' mnemonic for alarm siting. 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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    5 分
  • [ACS CCN1] 8, Complete and Incomplete Combustion

    [ACS CCN1] 8, Complete and Incomplete Combustion
    2026/08/24
    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: - Flame characteristics and exact air requirements for complete versus incomplete combustion in natural gas appliances. - Primary products of combustion including carbon dioxide, water vapour, carbon monoxide, soot, and aldehydes. - Why relying on flame colour alone is a critical exam trap and how lint or flame impingement alter flame appearance. - How to diagnose causes of poor combustion across the burner, combustion space, heat exchanger, and chimney system. - How to connect physical inspection evidence like soot deposits, staining, and vitiation to root causes using the SOOT mnemonic. 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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    4 分
  • [ACS CCN1] 7, Natural Gas Properties, Flammability, and Ignition Sources

    [ACS CCN1] 7, Natural Gas Properties, Flammability, and Ignition Sources
    2026/08/23
    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 natural gas relative density of 0.6 affects gas movement and ventilation tactics compared to LPG. - The precise flammable range of natural gas from 5% LEL to 15% UEL and the explosive stoichiometric ratio. - Why odorisation with mercaptans allows gas detection at 1% concentration or 20% of LEL. - The step-by-step safety logic for isolating gas leaks at the ECV and notifying the Gas Emergency Service. - The critical exam trap of operating electrical switches during a gas escape and how to eliminate ignition hazards. 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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    4 分
  • [ACS CCN1] 6, Gas Escape Emergency Priorities

    [ACS CCN1] 6, Gas Escape Emergency Priorities
    2026/08/22
    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: - The exact 5-step priority sequence for gas escape emergencies under ACS CCN1 guidelines. - Why operating electrical switches is a major exam trap during a gas escape investigation. - Proper ventilation protocols and how to isolate the Emergency Control Valve safely. - Required actions under GIUSP when gas continues escaping after shutting the ECV. - The PEVCA mnemonic to recall emergency priorities under assessment pressure. 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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    4 分