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Air Distribution — Texas ACR A Practice Questions

36 questions · 15% of the Texas ACR A exam

Worked questions

1. A commercial kitchen in Texas requires additional ventilation due to the high levels of cooking-related emissions. Which of the following ventilation strategies is most effective for this application?

  • AUsing a single-point exhaust fan.
  • BInstalling a range hood over each cooking appliance.
  • CRelying on natural ventilation alone.
  • Using a mechanical ventilation system with a dedicated kitchen exhaust system.

Exam tip

Dedicated kitchen exhaust systems are crucial for maintaining indoor air quality in commercial kitchens with high cooking emissions.

Why D is correct

A mechanical ventilation system with a dedicated kitchen exhaust system is the most effective strategy for dealing with high levels of cooking-related emissions. Single-point exhaust fans and range hoods are not sufficient for the scale of emissions typically found in commercial kitchens. Natural ventilation alone is not reliable in all weather conditions.

2. An office building in Texas is being designed with a natural ventilation system. According to the 2024 IMC, what is the minimum net free area required for natural ventilation?

  • A1 square foot per 100 square feet of floor area
  • 2 square feet per 100 square feet of floor area
  • C3 square feet per 100 square feet of floor area
  • D4 square feet per 100 square feet of floor area

Exam tip

Be familiar with the minimum net free area requirements for natural ventilation systems as per the IMC.

Why B is correct

The 2024 IMC requires a minimum net free area of 2 square feet per 100 square feet of floor area for natural ventilation. Options A, C, and D are below this requirement.

3. In a commercial kitchen, the exhaust hood is designed to capture grease-laden air. What is the minimum ventilation rate required per square foot of cooking surface?

  • A100 cfm
  • B150 cfm
  • 200 cfm
  • D250 cfm

Exam tip

Grease-laden air ventilation rates are critical for fire safety and air quality.

Why C is correct

The 2024 IFGC Section 403.3.1 requires a minimum ventilation rate of 200 cfm per square foot of cooking surface for grease-laden air in commercial kitchens. This is to ensure proper air quality and prevent fire hazards.

5. When inspecting an air distribution system, what is the recommended method for determining the airflow distribution in a space?

  • AVisual inspection only
  • BPressure drop calculations
  • Flow hoods and pitot tubes
  • DManual calculations based on system design

Exam tip

Direct measurement tools are preferred for inspecting air distribution systems.

Why C is correct

Flow hoods and pitot tubes are the most practical and accurate tools for measuring airflow distribution in a space. Visual inspection (A) is insufficient. Pressure drop calculations (B) and manual calculations (D) are not as precise as direct measurements.

31 more in the bank

Answers and explanations for these are in the app.

  • A commercial building in Texas is required to have a continuous air exchange rate of 0.5 air changes per hour. Which of the following methods would be the most effective in achieving this requirement?
  • A new restaurant in Texas is being designed with a ventilation system. What is the minimum outdoor air supply required per person in dining areas, according to the 2024 IFGC?
  • A public building in Texas is being retrofitted with a new air distribution system. What type of system is typically used for high-rise buildings to ensure efficient air distribution?
  • A residential building in Texas is being designed with a forced-air heating and cooling system. According to the 2024 IMC, what is the minimum supply air temperature that can be used for heating without causing condensation on the coil surfaces?
  • A residential building in Texas is designed with a central air distribution system. The air handler is located in the attic. What is the minimum required vent area for the air handler to prevent backdrafting?
  • A residential building in Texas is equipped with a central air distribution system. The system is designed to deliver conditioned air to all habitable rooms. Which of the following locations is the most appropriate for the return air grill in this scenario?
  • A retail store in Texas is considering upgrading its air distribution system to improve energy efficiency. According to the 2024 IFGC, what is the minimum efficiency required for air handlers in retail stores?
  • A school building in Texas is being renovated to improve its air distribution system. According to the 2024 IFGC, what is the minimum number of supply and return air outlets required per 100 square feet of floor area?
  • A school building in Texas is undergoing an HVAC upgrade. What is the minimum airflow rate required per person in classrooms, according to the 2024 IMC?
  • A Texas Environmental Air Class A contractor is conducting an air quality inspection in a public building. Which of the following is a common indicator of poor indoor air quality, according to Modern Refrigeration and Air Conditioning 22nd ed.?
  • A Texas Environmental Air Class A contractor is inspecting a refrigeration system in a supermarket. What is the maximum allowable refrigerant leak rate, according to the 2024 IMC?
  • A Texas Environmental Air Class A contractor is installing a new air distribution system in a residential building. The system includes a supply air duct that passes through a crawl space. What is the minimum clearance required between the duct and the floor of the crawl space according to the 2024 IMC?
  • A Texas Environmental Air Class A contractor is installing air filters in an industrial facility. The facility has a dust-laden environment. What is the minimum efficiency rating required for the air filters, according to the 2024 UMC?
  • A Texas Environmental Air Class A contractor is installing an air conditioning unit in an office building. The unit is located on the roof. What is the minimum vertical clearance required between the unit and the roof edge, according to the 2024 IMC?
  • A Texas Environmental Air Class A contractor is responsible for insulating the air ducts in a school building. What is the minimum R-value required for the duct insulation, according to the 2024 IMC?
  • A Texas residential building has a crawl space that is used for air distribution. How should the air distribution system be designed to prevent moisture accumulation in the crawl space?
  • A warehouse in Texas needs to ensure proper airflow in its ventilation system. According to the 2024 UMC, what is the minimum accuracy required for airflow measurement devices?
  • According to the 2024 UMC, what is the maximum temperature difference between the air entering and leaving an air-cooled condenser unit?
  • An industrial facility in Texas is installing new air ducts. According to the 2024 UMC, what is the minimum R-value of insulation required for ducts conveying air at 180°F?
  • An industrial facility in Texas is upgrading its air filtration system. The current system uses a baghouse filter. Which type of filter is most likely to be used as a pre-filter in this upgrade?
  • An industrial facility in Texas uses a dust collector that requires regular maintenance. Which type of air filter should be used to prevent the build-up of dust on the collector's components?
  • An industrial facility in Texas uses a high-pressure air distribution system. What is the maximum allowable pressure drop across the system, according to the 2024 UMC?
  • In a commercial building, a Texas Environmental Air Class A contractor is designing a ventilation system. The system must provide 100% outdoor air. What is the minimum outdoor air ventilation rate required per person, according to the 2024 IFGC?
  • In a commercial building in Texas, the 2024 IFGC requires a minimum of 0.35 air changes per hour for ventilation. If the building has a volume of 100,000 cubic feet, what is the minimum outdoor air supply required?
  • In a healthcare facility, what is the recommended frequency for replacing the air filters in the HVAC system?
  • In a hospital, a Texas Environmental Air Class A contractor is verifying the airflow in a critical care room. What is the recommended method for measuring airflow, according to the ACCA Manual D?
  • In a public building in Texas, a new air handling unit is being installed. The engineer has specified a minimum airflow rate of 100 cfm per person. Which of the following statements about airflow is true?
  • In a public building in Texas, the air distribution system is being inspected. The inspector notes that the airflow in one of the rooms is significantly lower than the design specifications. Which of the following steps should the inspector take next?
  • In an office building, what is the recommended relative humidity level for maintaining good indoor air quality?
  • What is the minimum amount of outdoor air that must be supplied to each occupant of a residential building according to the 2024 IMC Section 403.2?
  • Which of the following is a correct application of a relief vent on an exhaust air system?

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