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About This Quiz
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
The result may be an uneven distribution of hot or cold air.
unsupported ducts
tilting ducts
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When a system is out of balance, what may be the cause?
furnace malfunction
improperly set ducts and registers
The cause may be improperly set ducts and registers.
blower malfunction
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How can you tell if a damper is in the open position?
parallel to the top and bottom of the ducting
When in the open position, the damper will be turned 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
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How can you improve the flow of warm air through your home?
Increase blower speed.
To increase the flow of warm air, raise the speed of the blower.
Decrease blower speed.
Raise thermostat temperature.
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How can you decrease the noise from a forced-air system?
Increase blower speed.
Decrease blower speed.
Decreasing the blower speed may decrease the noise.
Decrease thermostat temperature.
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What type of insulation may be used for ducts?
wool
fiberglass
Fiberglass insulation may be used to wrap ducts.
foam
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Forced-air systems are fueled by electricity, gas or:
oil
Forced-air systems are fueled by electricity, gas or oil.
coal
wood
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What happens to the cold air that is returned to the furnace?
rewarmed
distributed
both answers
The cold air is rewarmed and distributed.
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A forced-air system may be used for what purpose other than heating?
distributing cooled air
A forced-air system may also be used to distribute cooled air from a central air conditioner.
no other purpose
removing smoke
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What are big problems for forced-air systems?
noise
air blockage
both answers
Forced-air systems rarely malfunction, but big problems may involve noise and airflow blockage.
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What may cause airflow blockage?
dirt
blocking the registers
both answers
Dirt and furniture items blocking the registers may cause airflow blockage.
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When balancing the system, what should you do to the furnace?
Turn furnace on.
Run the furnace while balancing the system.
Turn furnace off.
neither answer
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How do you adjust blower speed?
Increase thermostat temperature.
Decrease thermostat temperature.
Adjust the pulley on the blower motor drive.
To change blower speed, adjust the pulley on the blower motor drive.
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What happens if the motor and blower pulley become unbalanced?
blower noise
decrease in distribution system efficiency
both answers
The result may be an increase of noise from the blower and a decrease in efficiency of the distribution system.
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What tool should you use to check pulley alignment?
carpenter's square
Use a carpenter's square to check for alignment.
carpenter's level
ruler
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You Got:
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