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Free ASCS Exam Braindumps (page: 17)

Page 16 of 38
PDF with 148 Questions

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

  1. perform a thermostat calibration.
  2. turn thermostat off and observe unit response.
  3. check the voltage between the c and r/rh thermostat terminals.
  4. set thermostat to an extreme temperature and observe unit response.

Answer(s): D



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

  1. Cleaning the drain line lowers static pressure.
  2. A clogged drain line can result in standing water in the Air Handling Unit (AHU).
  3. A clogged drain line would require antimicrobials to be applied to the HVAC ductwork.
  4. Cleaning the drain line increases static pressure.

Answer(s): B



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

  1. the drain pan does not operate properly.
  2. an HVAC cleanliness evaluation identifies Condition 3.
  3. the airflow from the registers is weak.
  4. settling plates left on room surfaces show evidence of microbial growth.

Answer(s): D



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

  1. flooding of the secondary drain pan.
  2. unnecessary static pressure inside the VAVs.
  3. distribution of irritants inside the occupied space.
  4. the need for additional filters.

Answer(s): C






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