NADCA NADCA-ASCS Online Practice Questions and Exam Preparation

NADCA NADCA-ASCS Online Questions & Answers

• Question 101:

  Which initial safety step should be taken to prevent electrical shock when cleaning the supply plenum of a heat pump with electric back-up heat?

  A. Setup containment
  B. Lock out power
  C. Put on safety glasses
  D. Put on gloves
  B. Lock out power

• Question 102:

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

• Question 103:

  The PRIMARY role of pipe insulation on chilled water lines is to prevent:

  A. head injuries.
  B. condensation.
  C. freezing.
  D. bursting.
  B. condensation.

• Question 104:

  Which of the following would NOT be appropriate for use in cleaning internally-lined sheet metal ductwork?

  A. HEPA contact vacuum
  B. Skipper ball
  C. Soft nylon brush
  D. Silica carbide brush
  D. Silica carbide brush

• Question 105:

  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.
  D. sealed with tape.

• Question 106:

  The MOST common types of fuel consumed in modern residential HVAC systems are:

  A. natural gas, propane, and oil
  B. electric, propane, and oil
  C. natural gas, methane, and oil
  D. natural gas, propane, and ethanol
  A. natural gas, propane, and oil

• Question 107:

  After cleaning the ductwork for a residential high efficiency gas furnace, the client calls stating there is water on the floor around the furnace. Which of the following is the MOST likely cause?

  A. Disconnected condensate pump
  B. Disconnected gas line
  C. Leaking refrigerant liquid line
  D. Leaking condenser coil
  A. Disconnected condensate pump

• Question 108:

  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
  C. Excessive dust accumulation

• Question 109:

  Having a regular HVAC filter replacement plan can help:

  A. protect the system components.
  B. double the system’ airflow.
  C. humidify the airflow.
  D. sanitize the system components.
  A. protect the system components.

• Question 110:

  Changes in temperature in a constant air volume (CAV) system are made by:

  A. dampering at terminal ends.
  B. modulating the volume of air.
  C. heating or cooling the air.
  D. dampering at the fan.
  B. modulating the volume of air.