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C-21D Refrigeration and Air Conditioning Maintenance Contractor (2017-05-01)

The repair and replacement of any parts of existing units or systems of air-conditioning and refrigeration, including the compressors, motors, relays, coils, heat exchangers and other appurtenances and equipment, but not the replacement of complete condenser assemblies on remote systems, air handlers or any work that may alter the design of an existing system.

60 Questions
70% Minimum Passing Score
2 Hours

These products apply to test outline dated 2017-05-01

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Open Book These books are allowed while taking your test.
Closed Book These books are for pre-test study only and are not available for use during the test.

  • Closed Book

    Troubleshooting and Servicing Modern Air Conditioning and Refrigeration Systems

    2nd Edition

    $76.29

    The book details a variety of topics and troubleshooting procedures, including the following: refrigerant pressures, states, and conditions, subcooling and superheat, compression systems, metering devices, system charge, diagnosing air conditioning systems, systematic troubleshooting, alternative refrigerants, refrigerant blends an oils, leak detection - evacuation and clean up procedures, ozone depletion and global warming. Troubleshooting and Servicing Modern Air Conditioning and Refrigeration Systems discusses the changes affecting the refrigeration and air conditioning industries with an emphasis on the phaseout of CFC and HCFC refrigerants. Detailed sections on the most current leak detection and evacuation methods are included, as well as a section on alternative refrigerants and retrofit guidelines. The book also includes refrigerant changeover guidelines for the following conversions: R-12 to R-134a; R-12 to R-401A; R-12 to R-401B; R-502 to R-402A/R-408A; and R-502 to R-404A/R-507.
  • Open Book

    Blank Quick Reference Tabs

    $10.16

  • Closed Book

    Modern Refrigeration and Air Conditioning 20th Edition

    20th Edition

    $127.25

    Modern Refrigeration and Air Conditioning is the HVACR standard for a new generation of learner. Whether you're in a digital or print, on-ground or hybrid environment, this integrated learning solution will engage students with resource elements including textbook content, an online learning platform, video clips, narrated animations, digital activities, questions, and hands-on lab activities to assess and to reinforce learning based upon the original HVACR industry standard.
  • Closed Book

    Code of Federal Regulations, 29 CFR Part 1926 (OSHA) 2017

    Publication Year: 2017

    $26.78

    Make compliance with dense government safety regulations simple with MANCOMM’s 29 CFR 1926 OSHA Construction Industry Regulations. Updated through January 2017, the book provides you with a comprehensive set of the most up-to-date Construction regulations. Utilizing MANCOMM’s signature formatting approach – RegLogic – this edition includes notations for changes within the past year and letters of reference.
  • Open Book

    Uniform Mechanical Code 2012

    $115.00

    Uniform Mechanical Code 2012 provides complete requirements for the installation and maintenance of heating, ventilating, cooling and refrigeration systems, while at the same time allowing latitude for innovations and new technologies.