12 questions · 5% of the Texas ACR A exam
Where to look it up
https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.150
Why C is correct
9,000 / 3,000 = 3 for area coverage. Placement must also meet the 100-foot maximum travel distance and applicable floor and hazard requirements; those may require additional extinguishers.
Where to look it up
Explicit exercise assumptions; not a universal code requirement.
Why B is correct
30 × 10 = 300 cfm. This is only the specified people component; any area component and system adjustments are outside the calculation.
Where to look it up
Explicit exercise assumptions; not a universal code requirement.
Why A is correct
72 − 65 = 7°F. Apply the equipment-specific limit supplied here; do not substitute a universal 40°F return-gas maximum.
Where to look it up
https://www.cdc.gov/niosh/ventilation/faq/index.html
Why B is correct
Airflow = ACH × volume / 60 = 3 × 1,200 / 60 = 60 cfm. The target is an exercise assumption, not a minimum bedroom ventilation requirement.
Where to look it up
Explicit exercise assumptions; not a universal code requirement.
Why B is correct
Only the eight additional occupants change this component: (28 − 20) × 10 = 80 cfm. The supplied rate is a design assumption, not an independently verified code rate.
Where to look it up
https://www.iccsafe.org/building-safety-journal/bsj-technical/exhaust-systems-and-makeup-air-achieving-balance-under-the-2024-international-mechanical-code/
Why C is correct
ICC describes simultaneous operation of mechanical makeup air and exhaust, with replacement air arranged so it does not impair hood capture. This addresses coordination, not a universal spark-arrestor requirement.
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