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Air Systems Cleaning Specialist Questions 56–60 (page: 13)

Updated On: 10-Feb-2026

National Fire Protection Association (NFPA) 90A - 02, Standard for the Installation of Air-Conditioning and Ventilating Systems, makes which of the following statements regarding cleaning?

  1. Cleaning should be undertaken yearly
  2. Cleaning should never be undertaken
  3. Cleaning should be undertaken once every five years or sooner
  4. Cleaning should be undertaken whenever an inspection indicates the need

Answer(s): A



What resource is BEST to refer to when determining if all project work has been completed?

  1. ACR, The NADCA Standard
  2. Scope of work
  3. Hazard assessment
  4. Inspection report

Answer(s): D



According to ACR, The NADCA Standard, it is recommended that the work plan include the name and contact information for:

  1. the manufacturer of all equipment to be used on the project.
  2. contractors and representatives involved in the project.
  3. all employees working on the project.
  4. past projects conducted by the company.

Answer(s): C



Which of the following components is MOST likely to contain microbial growth?

  1. Condensate drain line and drain pan
  2. Blower wheel housing and shaft
  3. Interior side walls of the HVAC unit
  4. Last set of turning vanes just before the air enters the HVAC unit

Answer(s): A



Significant contaminant build-up in ductwork is MOST likely found in areas affected by:

  1. heat loss.
  2. pressure drops.
  3. temperature differences.
  4. pressure increases.

Answer(s): B



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