HVAC Servicing Test 2 (Week 7)

The heat exchanger should be inspected as best as possible on every furnace maintenance visit.

• True

• False

A visual inspection of the entire length of the flue pipe is not required on a maintenance visit.

• True

• False

How many cubic feet of air are necessary to properly burn 1 ft3 of gas?

• 10ft³

• 11 ft³

• 15 ft³

• 16 ft³

What is the name for the air pulled into the burner tube prior to ignition?

• Excess air

• Primary air

• Secondary air

• Cool air

What is the name for the air drawn in to support combustion?

• Excess air

• Primary air

• Secondary air

• Cool air

A proper burning flame should contain which of the following colors:

• yellow

• light blue

• dark blue

• red

• Orange

What is the part of the burner that increases the air velocity to induce the primary air?

• Manifold

• Orifice

• Venturi

• Slot

Where is secondary air induced into the furnace?

• Manifold

• Orifice

• Burners

• Venturi

What are the symptoms of a shortage of primary air?

• Lazy yellow flame

• Orange streaks

• CO

• CO₂

Increasing the fan speed on a furnace will increase the temperature rise?

• True

• False