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  2. Section 608 - Wikipedia

    en.wikipedia.org/wiki/Section_608

    A technician seeking Universal certification must correctly answer 18 out of 25 questions on each section of the exam. In addition to covering EPA (in particular, Section 608) regulations, the exam also covers basic safety and occupational practices, along with fundamental concepts of stratospheric ozone protection (which are typically part of ...

  3. Air Movement and Control Association - Wikipedia

    en.wikipedia.org/wiki/Air_Movement_and_Control...

    AMCA Publication 511 - Certified Ratings Program - Product Rating Manual for Air Control Devices describes the certification procedures under which the AMCA International Certified Ratings Seal is granted for sound, air performance, air leakage, water penetration and wind driven rain for air control products.

  4. Two-tier system - Wikipedia

    en.wikipedia.org/wiki/Two-tier_system

    The employer wishes to reduce overall wage costs by hiring new employees at a wage less than the wage of incumbent workers. [1] [2] A much less common system is the two-tier benefit system, which extends certain benefits to new employees only if they receive a promotion or are hired into the incumbent wage structure. [3] [4] [5]

  5. Air Conditioning, Heating and Refrigeration Institute - Wikipedia

    en.wikipedia.org/wiki/Air_Conditioning,_Heating...

    Logo. The Air Conditioning, Heating, and Refrigeration Institute (AHRI), formed in 2008 by a merger of the Air-Conditioning and Refrigeration Institute (ARI) and the Gas Appliance Manufacturers Association (GAMA), is a North American trade association of manufacturers of air conditioning, heating, and commercial refrigeration equipment.

  6. Occupational licensing - Wikipedia

    en.wikipedia.org/wiki/Occupational_licensing

    The empirical work on the effects of licensing on employment levels or growth rates, but the existing estimates suggest that they could be large. Kleiner (2006) [31] examined employment growth rates in states and occupations with stronger versus weaker occupational licensing requirements. Specifically, he compares employment growth between 1990 ...

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  9. Sheet Metal and Air Conditioning Contractors' National ...

    en.wikipedia.org/wiki/Sheet_Metal_and_Air...

    The Sheet Metal and Air Conditioning Contractors' National Association (SMACNA; pronounced 'Smack'-'Nah') is an international trade association with more than 4,500 contributing contractor members [1] in 103 chapters [2] throughout the United States, Canada, Australia and Brazil.

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