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 61:

    To test whether a residential thermostat is working, the technician should:

    A. perform a thermostat calibration.

    B. turn thermostat off and observe unit response.

    C. check the voltage between the c and r/rh thermostat terminals.

    D. set thermostat to an extreme temperature and observe unit response.

  • Question 62:

    Which of the following is a PRIMARY reason the condensate drain line is flushed and cleaned during Type 2 Coil Cleaning?

    A. Cleaning the drain line lowers static pressure.

    B. A clogged drain line can result in standing water in the Air Handling Unit (AHU).

    C. A clogged drain line would require antimicrobials to be applied to the HVAC ductwork.

    D. Cleaning the drain line increases static pressure.

  • Question 63:

    According to ACR, The NADCA Standard, an HVAC system component is considered contaminated when:

    A. the drain pan does not operate properly.

    B. an HVAC cleanliness evaluation identifies Condition 3.

    C. the airflow from the registers is weak.

    D. settling plates left on room surfaces show evidence of microbial growth.

  • Question 64:

    Damage to the insulation inside an Air Handling Unit (AHU) can lead to:

    A. flooding of the secondary drain pan.

    B. unnecessary static pressure inside the VAVs.

    C. distribution of irritants inside the occupied space.

    D. the need for additional filters.

  • Question 65:

    Mycotoxins are produced by:

    A. mold.

    B. bacteria

    C. viruses.

    D. algae.

  • Question 66:

    Mold growth in an HVAC system:

    A. will make all occupants ill.

    B. is acceptable if limited to the return ductwork.

    C. is acceptable if limited to the air handler.

    D. can make some occupants ill.

  • Question 67:

    A common contaminant in HVAC units is:

    A. skin flakes.

    B. pieces of filter media.

    C. arsenic derivatives.

    D. calcium carbonate.

  • Question 68:

    Contaminants in an HVAC system:

    A. are always biohazards.

    B. are always asthma-inducing.

    C. should be lab tested if Condition 1 is found.

    D. could be any substance.

  • Question 69:

    An ASCS notices that the supply air plenum of a unit being cleaned has excessive mold growth. What is the common symptom an unprotected worker may experience?

    A. Blurred vision

    B. Anaphylactic shock

    C. Allergic rhinitis

    D. Chest pain

  • Question 70:

    The term Building Related Illness (BRI) refers to:

    A. Sick Building Syndrome (SBS).

    B. allergic reactions to dust.

    C. medically recognized diseases or disorders.

    D. interior mold contamination.

Tips on How to Prepare for the Exams

Nowadays, the certification exams become more and more important and required by more and more enterprises when applying for a job. But how to prepare for the exam effectively? How to prepare for the exam in a short time with less efforts? How to get a ideal result and how to find the most reliable resources? Here on Vcedump.com, you will find all the answers. Vcedump.com provide not only NADCA exam questions, answers and explanations but also complete assistance on your exam preparation and certification application. If you are confused on your ASCS exam preparations and NADCA certification application, do not hesitate to visit our Vcedump.com to find your solutions here.