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Testing — Texas ACR A Practice Questions

24 questions · 10% of the Texas ACR A exam

Worked questions

1. Before choosing an air-sampling method for an industrial workspace, which information is most relevant?

  • AOnly the room name on the floor plan.
  • The suspected contaminants, exposure tasks and applicable sampling methods.
  • COnly the HVAC contractor license class.
  • DOnly the number of ceiling tiles.

Where to look it up

https://www.osha.gov/otm/section-2-health-hazards/chapter-1

Why B is correct

OSHA sampling guidance starts from the exposure being assessed. A title such as air-quality officer does not replace contaminant identification and a suitable sampling strategy.

2. A hospital air-handler filter has the specified media rating, but inspection finds gaps around its frame. What issue should be corrected?

  • AThe room number on the maintenance log.
  • BThe paint color on the access panel.
  • Air bypass around the filter seals.
  • DThe filter rating alone, with no attention to the gaps.

Where to look it up

https://www.cdc.gov/infection-control/hcp/environmental-control/air.html

Why C is correct

Air that bypasses the media is not filtered by it. CDC discusses correct installation and maintenance of filtration systems; media rating alone does not establish installed performance.

5. A refrigeration maintenance procedure requires a verified leak test after a repaired joint and before return to service. The repair is complete but the test has not been performed. What remains necessary under the procedure?

  • Perform and document the required leak test.
  • BReturn to service because the joint looks clean.
  • CSkip the test if the repair took less than an hour.
  • DReplace the test record with an annual calendar reminder.

Where to look it up

Explicit exercise assumptions; not a universal code requirement.

Why A is correct

A completed physical repair does not satisfy the separate verification step. The stated procedure supplies the obligation; no unsupported IMC maintenance list is implied.

6. An industrial process changes to a different solvent. What is the best reason to reassess the air-sampling plan?

  • AEvery solvent necessarily has the same exposure characteristics.
  • BA previous sample guarantees all future exposure levels.
  • The contaminant and exposure profile may have changed.
  • DThe calendar alone determines whether new hazards exist.

Where to look it up

https://www.osha.gov/otm/section-2-health-hazards/chapter-1

Why C is correct

Sampling must address the current exposure. Process changes can alter the analyte, concentration and timing; an arbitrary annual interval does not establish representativeness.

8. A facility emergency plan directs occupants to leave a room and call the response team when its refrigerant alarm sounds. The alarm activates. What should an untrained occupant do?

  • Leave as directed and notify the response team from a safe location.
  • BRemain inside to locate the leak by smell.
  • CAssume switching off the thermostat has stopped the release.
  • DRe-enter alone to silence the alarm.

Where to look it up

Explicit exercise assumptions; not a universal code requirement.

Why A is correct

Follow the supplied emergency plan. Turning off equipment does not establish that a release has stopped or that the atmosphere is safe. The scenario does not authorize untrained rescue or repair.

9. A sampling plan collects only one brief area sample while the highest-exposure task occurs at another time. What is the main limitation?

  • AAny single area sample represents every worker for the whole day.
  • It may not represent the workers’ exposure during that task.
  • CA contractor license guarantees the sample is representative.
  • DExactly three samples always resolve every exposure question.

Where to look it up

https://www.osha.gov/otm/section-2-health-hazards/chapter-1

Why B is correct

Sampling location, duration and task timing matter. OSHA guidance distinguishes strategies for exposure assessment; a fixed count alone cannot guarantee adequate representation.

15 more in the bank

Answers and explanations for these are in the app.

  • A code-inspector is tasked with testing the refrigeration system in a food service establishment. According to the 2024 UMC, what is the minimum temperature that walk-in coolers must maintain?
  • A commercial building has a new HVAC system installed. According to the 2024 IFGC, what is the maximum allowable time between the installation and the first inspection of the system?
  • A commercial building is undergoing a compliance verification for its air conditioning system. According to the 2024 IFGC, which of the following is the required minimum supply air temperature for comfort cooling in a commercial building?
  • A contractor is designing an air conditioning system for an office building. According to Modern Refrigeration and Air Conditioning, what is the recommended approach for sizing the cooling capacity?
  • A contractor is required to perform air quality testing in a newly constructed residential building. Which of the following is the correct minimum number of air samples required according to the 2024 IMC?
  • A public school is upgrading its ventilation system. According to the Texas Occupations Code Chapter 1302, what is the minimum ventilation rate required for classrooms?
  • A residential air conditioning unit is not cooling effectively. According to the ACCA Manual D, what could be the most common cause of this issue?
  • A residential building is being inspected for compliance with air quality standards. During the inspection, a sample of the air is taken. According to the 2024 IMC, which of the following is the minimum acceptable airflow rate for the air sampler to ensure accurate sampling?
  • A school building is experiencing excessive indoor air pollution. According to the 2024 UMC, what is the recommended ventilation rate to reduce indoor air pollutants?
  • A school is scheduled for a ventilation system inspection. According to the 2024 IMC, what is the minimum outdoor air ventilation rate required for a classroom with 30 students?
  • An industrial facility is required to conduct refrigerant leak detection. According to the 2024 UMC, which of the following methods is not allowed for refrigerant leak detection?
  • An inspector is reviewing the energy efficiency of a residential complex. According to the ACCA Manuals D/J/S, which factor is most critical in determining the energy efficiency of a building?
  • An office building is considering the use of low-VOC paints to improve indoor air quality. According to the 2024 IMC, what is the maximum VOC content allowed in low-VOC paints?
  • An office building is implementing an indoor air quality monitoring program. According to the Texas Administrative Code Chapter 75, how often should indoor air quality be monitored in a typical office building?
  • During the inspection of a ventilation system in a commercial building, the contractor finds that the system is not providing the required amount of air changes per hour. What is the correct action to take according to the 2024 IFGC?

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