Forced-Air Furnace Introduction Quiz 1

what are the two types of blower motors used with forced air furnaces?

• gear drive and direct drive blower

• belt drive and direct drive blower

Joint compound in gas piping is applied sparingly to the ______ threads only

• Female

• Male

• None Needed

Unlike a noncondensing furnace, a condensing furnace can use_________for its exhaust flue.

• a chimney

• galvanized steel

• PVC or CPVC

• stainless steel

Which of the following best describes the function of a combustion blower?

• It atomizes fuel as it enters the combustion chamber

• It brings fresh air into the combustion chamber and expels combustion gases

• It compresses the fuel mixture as it enters the combustion chamber

• It reduces draft in the flue

What type of furnaces are high efficiency with AFUE ratings above 90%?

• Noncondensing.

• Combustion.

• Condensing.

• Noncombustion.

A furnace’s ____ blower creates airflow through the heat exchanger and ductwork to deliver warm air to the conditioned area.

• combustion

• indoor

• outdoor

• secondary

In direct-drive blowers, the ____ of the blower motor is connected to the blower fan.

• pulley

• shaft

• braking system

• V-belt

A furnace that can be reconfigured to allow airflow through in any direction is a ____ furnace.

• noncondensing

• multipoise

• highboy

• lowboy

In what type of system is the supply air delivered out of the top of the furnace into an overhead duct system?

• Upflow.

• Downflow.

• Counterflow.

• Horizontal.

Which type of furnace takes in return air from the top and forces it out near the bottom?

• Downflow.

• Upflow.

• Horizontal.

• None of the answers.