Make-Up Air Units Quiz

What is the primary purpose of make-up air systems?

• To provide heating only

• To cool indoor spaces

• To ensure safe air exchange

• To filter outdoor air

Which type of make-up air unit has a gas burner installed directly in the outside airstream?

• Indirect gas-fired

• Hybrid make-up air

• Direct gas-fired

• Electric make-up air

What is a common application for gas-fired make-up air units?

• Air conditioning in homes

• Swimming pools

• Paint booths

• Residential heating

What is the function of isolation dampers in make-up air units?

• To filter air

• To control humidity

• To prevent cold air infiltration

• To heat the air

What does the flame proving sensor do?

• Monitors temperature

• Senses the presence of flame

• Regulates air pressure

• Controls the gas flow

Which component is responsible for regulating gas pressure in a make-up air unit?

• Pilot gas burner

• Flame sensor

• Main gas pressure regulator

• High temperature limit switch

What is a disadvantage of mounting a make-up air unit on the roof?

• Lower installation costs

• Exposure to weather conditions

• Visibility from the ground

• Easier access for maintenance

What is the recommended air supply temperature range for direct gas-fired MUA units?

• 30°F to 50°F

• 100°F to 150°F

• 50°F to 100°F

• 150°F to 200°F

Which of the following is NOT a benefit of a properly designed make-up air system?

• Improved indoor air quality

• Conditioned replacement air

• Increased energy costs

• Reduced infiltration of cold air

What is the purpose of the high temperature limit switch?

• To control the gas flow

• To monitor flame presence

• To prevent overheating

• To regulate air pressure