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The Ultimate Troubleshooting a Forced-Air System Quiz
by Staff
A forced-air system is an efficient way to distribute warm or cool air to every room of your home. Learning some basic troubleshooting skills may help you to maintain the unit. Take this quiz to see how to blow away the troubles in your forced-air distribution system.

When a forced-air system is out of balance, what may be the result?

  • uneven distribution of hot or cold air
  • unsupported ducts
  • tilting ducts

When a system is out of balance, what may be the cause?

  • furnace malfunction
  • improperly set ducts and registers
  • blower malfunction

How can you tell if a damper is in the open position?

  • parallel to the top and bottom of the ducting
  • perpendicular to the top and bottom of the ducting
  • at a right angle to the top and bottom of the ducting

How can you improve the flow of warm air through your home?

  • Increase blower speed.
  • Decrease blower speed.
  • Raise thermostat temperature.

How can you decrease the noise from a forced-air system?

  • Increase blower speed.
  • Decrease blower speed.
  • Decrease thermostat temperature.

What type of insulation may be used for ducts?

  • wool
  • fiberglass
  • foam

Forced-air systems are fueled by electricity, gas or:

  • oil
  • coal
  • wood

What happens to the cold air that is returned to the furnace?

  • rewarmed
  • distributed
  • both answers

A forced-air system may be used for what purpose other than heating?

  • distributing cooled air
  • no other purpose
  • removing smoke

What are big problems for forced-air systems?

  • noise
  • air blockage
  • both answers

What may cause airflow blockage?

  • dirt
  • blocking the registers
  • both answers

When balancing the system, what should you do to the furnace?

  • Turn furnace on.
  • Turn furnace off.
  • neither answer

How do you adjust blower speed?

  • Increase thermostat temperature.
  • Decrease thermostat temperature.
  • Adjust the pulley on the blower motor drive.

What happens if the motor and blower pulley become unbalanced?

  • blower noise
  • decrease in distribution system efficiency
  • both answers

What tool should you use to check pulley alignment?

  • carpenter's square
  • carpenter's level
  • ruler