Exam Details

  • Exam Code
    :ASCS
  • Exam Name
    :Air Systems Cleaning Specialist
  • Certification
    :NADCA Certifications
  • Vendor
    :NADCA
  • Total Questions
    :148 Q&As
  • Last Updated
    :Jul 02, 2025

NADCA NADCA Certifications ASCS Questions & Answers

  • Question 121:

    Service openings shall NOT be made in what type of duct?

    A. Duct board

    B. Fibrous glass

    C. Metal

    D. Flexible

  • Question 122:

    When closing wrapped sheet metal ducts, the insulation should be

    A. adhered with caulking.

    B. left off for future access.

    C. folded into place.

    D. sealed with tape.

  • Question 123:

    When working in a hospital, who is responsible for determining cleanup of the work area?

    A. Contractor and patient advocate

    B. Contractor and local building official

    C. Client and local building official

    D. Client and contractor

  • Question 124:

    When finishing up the air duct cleaning project, what is one of the final steps the ASCS should perform prior to leaving the client's property?

    A. Check the panel to make certain the circuit breaker is of.

    B. Ensure fire protection systems are de-energized

    C. Check that the system functions property in heating/cooling mode.

    D. Ensure Lockout/Tagout locks are in place

  • Question 125:

    After restarting the HVAC system, the technician shall verify

    A. the system functions in heating/cooling mode.

    B. the floor coverings are removed.

    C. service openings are closed.

    D. payment is collected.

  • Question 126:

    When is it appropriate to verify the effectiveness of HVAC system cleaning?

    A. During the cleaning process

    B. After the system is cleaned, and before the system is restarted

    C. After the system is restarted

    D. After the system is cleaned, but before coil cleaning is completed

  • Question 127:

    Unless otherwise specified, the goal of HVAC system cleaning is to restore the system to what minimum level of cleanliness?

    A. The system is visibly clean

    B. The system is tree of all adhered substances.

    C. The weight of contaminants is more than .7 mg per 100 sq. cm.

    D. The system passes the White Glove Test.

  • Question 128:

    Appropriate work-site containment monitoring is used to

    A. demonstrate the effectiveness of environmental engineering controls.

    B. monitor the progress of the project with respect to the schedule.

    C. monitor worker efficiency and safety.

    D. monitor the working hours relative to the plan.

  • Question 129:

    In accordance with ACR, the NADCA Standard, an accurate indicator of the effect of the removal of debris from the evaporator coil is to measure

    A. pressure drop across the evaporator coil

    B. the length and thickness of the evaporator coil

    C. the velocity of return air prior to the filter.

    D. the velocity of supply air at the diffusers.

  • Question 130:

    What is a common method of recording conditions inside the ductwork?

    A. A voice recording

    B. Written documentation

    C. Photographs

    D. Telling a coworker

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