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.

  Correct Answer: D

• 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.

  Correct Answer: B

• 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.

  Correct Answer: D

• 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.

  Correct Answer: C

• Question 65:

  Mycotoxins are produced by:

  A. mold.

  B. bacteria

  C. viruses.

  D. algae.

  Correct Answer: A

• 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.

  Correct Answer: D

• Question 67:

  A common contaminant in HVAC units is:

  A. skin flakes.

  B. pieces of filter media.

  C. arsenic derivatives.

  D. calcium carbonate.

  Correct Answer: D

• 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.

  Correct Answer: D

• 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

  Correct Answer: C

• 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.

  Correct Answer: C