North Carolina Contractors License Exams

North Carolina HVAC Contractor, Group 3 (Class II)

Sample Questions for the North Carolina HVAC Contractor, Group 3 (Class II) Exam

  1. In a heating and/or cooling system, what is the accessory used to supply and control the introduction of outside air and exhaust stale air?
    1. The humidistat
    2. The HEPA filter
    3. The energy recovery ventilator (ERV)
    4. The indoor air quality equalizer
  2. In a heating/cooling system, where should the filter be placed?
    1. Ahead of heating and cooling coils and other mechanical equipment
    2. Between the heating and cooling coils
    3. In the HVAC room next to the furnace
    4. On the side of the return air plenum
  3. When installing insulation in the interior of a duct, which of the following characteristics of insulation would be MOST effective in reducing sound transmission?
    1. Density
    2. Porosity
    3. Elasticity
    4. Ductility
  4. What is a sling psychrometer used for?
    1. Measuring dew point
    2. Determining relative humidity through the relation of wet bulb temperature to dry bulb temperature
    3. Checking the performance of air conditioning equipment
    4. To balance a heating/cooling split system
  5. Financial standards are:
    1. The regulatory requirements for preparation of financial statements
    2. Developed internally as a method of measuring results
    3. The accepted arrangement of accounts on financial statements
    4. The rules and regulations accountants follow in auditing your books
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