UK Exam Prep

UK Exam Prep

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UK Exam Prep episodes

  • [F-Gas Category I] 05, Evaporators, Expansion Devices and Controls
    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 evaporators, expansion devices, and thermostats differ in function within a refrigeration circuit.
    • The operational differences between a modulating thermostatic expansion valve and a fixed capillary tube restriction.
    • The recognition-level roles of liquid line accessories including filter driers, sight glasses, and pressure safety controls.
    • Why low suction pressure or sight glass bubbles do not automatically indicate a refrigerant leak.
    • A decision rule to distinguish airflow issues and circuit restrictions from refrigerant loss on the City & Guilds 2079 exam.
    Prepare for your City & Guilds 2079 Category I qualification with independent study materials at https://open-exam-prep.com/practice/uk-city-guilds-2079-l2-fgas and watch video tutorials at https://www.youtube.com/@Open-exam-prep .
    Sources checked: September 28, 2026
    - https://www.cityandguilds.com/qualifications-and-apprenticeships/building-services-industry/refrigeration-and-airconditioning/2079-f-gas-and-ods-regulations
    - https://www.gov.uk/guidance/qualifications-required-to-work-on-equipment-containing-f-gas
    - https://www.gov.uk/guidance/fluorinated-gases-f-gases
    - https://www.danfoss.com/en-us/products/dcs/sight-glasses/sight-glasses/
    - https://assets.danfoss.com/documents/latest/89852/AB216786428116en-000301.pdf
    5 min
  • [F-Gas Category I] 04, Compressor and Condenser Clues
    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 compressor designs like hermetic, semi-hermetic, and open drive dictate mechanical leak vulnerabilities at joints and shaft seals.
    * Why total condenser heat rejection exceeds evaporator cooling load due to compressor work input and heat of compression.
    * The qualitative thermodynamic effects of restricted condenser airflow on condensing temperature, head pressure, and cooling capacity.
    * Why elevated head pressure is a general operational symptom rather than a unique diagnosis for refrigerant overcharge.
    * Key regulatory differences between Great Britain, Northern Ireland, and European Union F-Gas rules for Category I candidates.
    OpenExamPrep provides independent study tools and practice resources for candidate revision at https://open-exam-prep.com/practice/uk-city-guilds-2079-l2-fgas and video materials at https://www.youtube.com/@Open-exam-prep .
    Sources checked: September 28, 2026
    https://www.cityandguilds.com/qualifications-and-apprenticeships/building-services-industry/refrigeration-and-airconditioning/2079-f-gas-and-ods-regulations
    https://www.gov.uk/guidance/qualifications-required-to-work-on-equipment-containing-f-gas
    5 min
  • [F-Gas Category I] 03, Latent Heat, Superheat and Subcooling
    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 sensible heat differs from latent heat during refrigerant phase changes.
    • How to define and calculate vapour superheat above suction saturation temperature.
    • How to define and calculate liquid subcooling below condenser saturation temperature.
    • Common exam traps including incorrect subtraction direction and mismatched pressure points.
    • A simple decision rule to distinguish superheat and subcooling on exam questions.
    This independent study resource helps candidates review core Category I theoretical concepts for the City & Guilds 2079 examination. For additional learning materials, practice questions, and video guides, visit https://open-exam-prep.com/practice/uk-city-guilds-2079-l2-fgas and https://www.youtube.com/@Open-exam-prep .
    Sources checked: September 28, 2026
    • https://www.cityandguilds.com/qualifications-and-apprenticeships/building-services-industry/refrigeration-and-airconditioning/2079-f-gas-and-ods-regulations
    • https://www.gov.uk/guidance/qualifications-required-to-work-on-equipment-containing-f-gas
    5 min
  • [F-Gas Category I] 02, Pressure, Temperature and the Units That Matter
    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 gauge pressure and absolute pressure differ in reference baseline and calculation.
    * Why a temperature difference of one kelvin equals a difference of one Celsius degree.
    * How to distinguish energy, specific enthalpy, power, and pressure by checking SI units.
    * Why pressure readings alone do not determine temperature in superheated or subcooled states.
    * How regulatory requirements are distinguished between Great Britain, Northern Ireland, and the EU.
    For independent study tools and practice resources for City & Guilds 2079 Category I, explore https://open-exam-prep.com/practice/uk-city-guilds-2079-l2-fgas and video materials at https://www.youtube.com/@Open-exam-prep .
    Sources checked: September 28, 2026
    - https://www.gov.uk/guidance/fluorinated-gases-f-gases
    - https://www.cityandguilds.com/qualifications-and-apprenticeships/building-services-industry/refrigeration-and-airconditioning/2079-f-gas-and-ods-regulations
    5 min
  • [F-Gas Category I] 01, The Refrigeration Cycle Explained
    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 heat transfers into the refrigerant at the evaporator inside a cold room setup
    * Why compressor mechanical work raises refrigerant pressure and temperature before heat rejection
    * How the condenser rejects both absorbed evaporator heat and added compressor work
    * Key distinction between fluid movement and heat transfer across the four main stages
    * Why the expansion device creates a temperature drop without removing thermal energy itself
    Prepare independently for your City & Guilds 2079 Category I theory examination with practice tools available at https://open-exam-prep.com/practice/uk-city-guilds-2079-l2-fgas and video learning at https://www.youtube.com/@Open-exam-prep .
    Sources checked: September 28, 2026
    https://www.gov.uk/guidance/qualifications-required-to-work-on-equipment-containing-f-gas
    https://www.cityandguilds.com/qualifications-and-apprenticeships/building-services-industry/refrigeration-and-airconditioning/2079-f-gas-and-ods-regulations
    5 min
  • [ACS CCN1] 48, Final Assessment Strategy and Current Document Check
    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 structure your ACS CCN1 Issue 19 assessment preparation around correct procedural sequence and safety rationales
    - The exact calculation pitfalls in heat input, gas rate, and purge volume that candidates commonly fail on
    - How to properly apply current UK legislation, normative standards, and manufacturer instructions
    - When to stop, classify defects under GIUSP, and seek guidance rather than guessing solutions
    - A simple mnemonic to recall key assessment priorities under 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
    4 min
  • [ACS CCN1] 47, Calculation and Procedure Scenario Review
    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 metric and imperial gas rates and convert consumption into gross heat input for CCN1 scenario assessments
    - How to determine total installation volume including U6 meter volume allowance and apply IGEM UP 1B Edition 4 tightness test procedures
    - Permissible pressure drop rules including the maximum 1 mbar limit between meter outlet and appliance inlet
    - Purge volume calculations and permanent ventilation free area requirements for domestic gas appliances
    - Key exam traps including gross versus net calorific values, let-by versus tightness pressures, and updated Edition 4 criteria
    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
    4 min
  • [ACS CCN1] 46, Legislation and Emergency Scenario Review
    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 ACS CCN1 scenario questions test Gas Safety Installation and Use Regulations alongside IGEM G11 GIUSP guidance
    - The exact action protocol for Immediately Dangerous versus At Risk gas situations, including emergency service escalation steps
    - Key differences between landlord statutory duties under Regulation 36 and engineer operational duties under Regulation 26
    - The ID SAFE mental shortcut for executing emergency isolation, labeling, warning notices, and mandatory RIDDOR reporting
    - Regional legislative distinctions between Great Britain GSIUR 1998 regulations and Northern Ireland gas safety rules
    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
    5 min
  • [ACS CCN1] 45, End-to-End Domestic Gas Safety Practical Sequence
    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 execute the mandatory step-by-step practical inspection sequence for the ACS CCN1 domestic gas assessment.
    - The critical stop points during tightness and let-by testing on standard domestic gas meter installations.
    - Requirements for inspecting gas pipework, main protective bonding, ventilation free area, and flue performance.
    - How to apply the Gas Industry Unsafe Situations Procedure when classifying Immediately Dangerous or At Risk situations.
    - The PREP mnemonic for recalling the correct assessment sequence from arrival to customer handover.
    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
    4 min
  • [ACS CCN1] 44, Re-Establishing Gas Supply and Relighting Appliances
    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 mandatory pre-checks required before restoring gas supply, including complete pipework tightness testing per IGEM/UP/1B.
    - Safe purging procedures to evacuate air from installation pipework prior to appliance ignition.
    - Why ACS examiners enforce strict adherence to Manufacturer's Instructions (MIs) rather than generic lighting techniques.
    - Post-ignition operational verifications, burner pressure readings, and the critical leak check on appliance test point screws.
    - Correct application of the Gas Industry Unsafe Situations Procedure (GIUSP) when an appliance cannot be safely relit or exhibits safety faults.
    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
    4 min

About UK Exam Prep

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UK exams support professional registration, skilled-trade qualifications, public-service recruitment, citizenship, licensing, and school admissions. Requirements can differ by awarding body and across…