Make-Up Air Units Quiz

What is the primary purpose of a make-up air (MUA) unit?

• To cool indoor air

• To filter air contaminants

• To replace exhausted air and balance air pressure

• To dehumidify indoor spaces

Which type of damper prevents cold air from entering a building when the MUA unit is off?

• Bypass damper

• Isolation damper

• Modulating damper

• Return damper

What is a key feature of gas-fired make-up air units in industrial settings?

• They only cool the air

• They help control air pressure

• They eliminate odors

• They reduce energy consumption by 50%

What is the purpose of a flame proving sensor in a MUA unit?

• Detects air quality

• Measures temperature

• Verifies the presence of flame for safety

• Controls the air pressure

Which of the following is an application of direct gas-fired MUA units?

• Dehumidification

• Space pressure control

• Increased building insulation

• Air purification

In MUA units, what is the function of high-velocity air switches?

• Initiate the ignition process

• Detect excessive airflow to prevent hazards

• Control fan speed

• Provide air filtration

What does the Alberta Building Code require for MUA units?

• MUA units must be installed on rooftops only

• They must provide preheated air in winter

• They require only one type of damper

• MUA units are optional

Which component minimizes wind impact on the intake hood of a MUA unit?

• Weatherproof seams

• Bird screen

• Profile plate

• Sloped intake hood

What is the main difference between direct and indirect gas-fired MUA units?

• Indirect units require less maintenance

• Direct units release combustion products into the air

• Indirect units use a heat pump

• Direct units are quieter

What is the purpose of a bypass damper in a MUA system?

• Increase airflow speed

• Allow air to bypass the burner when not needed

• Regulate the temperature

• Stop outdoor air from entering