NADCA NADCA Certifications ASCS Questions & Answers

• Question 41:

  A commercial Air Handling Unit (AHU) generally consists of:

  A. supply fan, coil, filters, and outlet and inlet dampers.

  B. exhaust fan, coil, filters, and outlet and inlet dampers.

  C. supply fan, coil filters, and humidifier.

  D. exhaust fan, coil, filters, and humidifier.

  Correct Answer: C

• Question 42:

  A client is noticing black particulate coming out of the diffusers and ending up on desks. During the initial inspection, the ASCS should pay close attention to the:

  A. condition of the ceiling tiles.

  B. condition of the internal duct insulation.

  C. condition of the external insulation on the return.

  D. closed cell foam insulation covering the AC line set.

  Correct Answer: B

• Question 43:

  The PRIMARY purpose of HVAC systems is to:

  A. heat and humidify air.

  B. remove contaminants from the air.

  C. condition air by filtering, heating, and cooling.

  D. provide fresh air to the occupants.

  Correct Answer: C

• Question 44:

  Which tool is used to visually inspect HVAC systems?

  A. Hygrometer

  B. Borescope

  C. Manometer

  D. Microscope

  Correct Answer: B

• Question 45:

  During routine inspections where no local problem is discovered, an inspector shall inspect at least:

  A. 5% of similar systems.

  B. 10% of similar systems.

  C. 15% of similar systems.

  D. 20% of similar systems.

  Correct Answer: B

• Question 46:

  An ASCS is cleaning an exhaust system that has a fan located adjacent to an outside air intake. Which of the following is a potential source of cross-contamination?

  A. Thermal drift

  B. Stratification

  C. Capture of exhaust air

  D. Negative pressure in the exhaust duct

  Correct Answer: C

• Question 47:

  According to ACR, The NADCA Standard, all portions of each coil assembly should be cleaned. In order to determine which type of cleaning is required, the ASCS should:

  A. access and inspect the upstream side of the coil.

  B. access and inspect the plenum upstream and downstream of the coil.

  C. access and inspect both upstream and downstream surfaces of the coil.

  D. perform pitot tube testing upstream and downstream of the coil.

  Correct Answer: C

• Question 48:

  When conducting an inspection of an HVAC system with a spray humidifier installed, what should the ASCS look for?

  A. The angle of the spray nozzles

  B. The size of the spray nozzles

  C. Excessive dust accumulation

  D. Evidence of excessive moisture

  Correct Answer: C

• Question 49:

  According to ACR, The NADCA Standard, which of the following is part of the HVAC system inspection?

  A. Thermostat

  B. Humidistat

  C. Exhaust air duct

  D. Combustion air duct

  Correct Answer: C

• Question 50:

  When conducting an inspection, the ASCS should:

  A. avoid cross-contamination and release of contaminants into occupied spaces.

  B. avoid contamination of instruments and observation tools.

  C. inform occupants immediately if mold is found.

  D. perform the inspection during normal business hours.

  Correct Answer: C