Texas Laws & Rules — Texas ACR A Practice Questions

12 questions · 5% of the Texas ACR A exam

Worked questions

1. A CO alarm activates near fuel-burning equipment. Which action is appropriate for an occupant?

Move to fresh air and contact emergency services, following the alarm instructions.
BReplace the particle filter and remain inside to see if the alarm stops.
CDisconnect the alarm because no smoke is visible.
DAssume the absence of odor proves the air is safe.

Where to look it up

https://www.cpsc.gov/Safety-Education/Safety-Education-Centers/Carbon-Monoxide-Information-Center

Why A is correct

CO is not reliably detected by human senses. Follow the alarm response instructions and obtain emergency assistance; changing a particle filter is not an emergency CO remedy.

2. A refrigeration energy exercise defines its performance ratio as useful cooling energy divided by electrical energy over the same period. Cooling is 240,000 Btu and electricity use is 20,000 Wh. What is the ratio?

A0.083 Btu/Wh
B120 Btu/Wh
12 Btu/Wh
D220,000 Btu/Wh

Where to look it up

Explicit exercise assumptions; not a universal code requirement.

Why C is correct

240,000 / 20,000 = 12 Btu/Wh. This is the defined exercise ratio, not a certified SEER, AWEF or regulatory minimum for a walk-in cooler.

3. In a water-heater energy exercise, useful heat delivered is 34,000 Btu and energy input is 40,000 Btu over the same test period. What is the delivered-energy fraction?

A1.18
0.85
C0.15
D0.085

Where to look it up

Explicit exercise assumptions; not a universal code requirement.

Why B is correct

34,000 / 40,000 = 0.85. The calculation does not establish an official EF/UEF rating or a universal minimum for water heaters.

4. An office air handler supplies 2,000 cfm, of which 20% is measured outdoor air. What outdoor-air flow does that represent?

A100 cfm
400 cfm
C1,600 cfm
D10,000 cfm

Where to look it up

Explicit exercise assumptions; not a universal code requirement.

Why B is correct

2,000 × 0.20 = 400 cfm. Occupant count alone is not used to invent a minimum rate; actual ventilation compliance is a separate check.

5. Under OSHA construction PPE requirements, what must an employer do when employees are exposed to hazards requiring protective equipment?

ATreat first-aid training as a substitute for required PPE.
Provide appropriate protective equipment and ensure it is used and maintained.
CRely only on periodic inspections instead of protective measures.
DUse a drug-testing policy instead of controlling the hazard.

Where to look it up

https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.95

Why B is correct

OSHA 1926.95 requires necessary protective equipment to be provided, used and maintained in a reliable condition, with appropriate selection and fit. PPE is part of the safety program and does not eliminate other hazard-control duties.

6. A classroom measurement gives 300 cfm of outdoor air and a room volume of 9,000 ft³. What outdoor-air change rate results?

A0.033 ACH
2 ACH
C30 ACH
D1,800 ACH

Where to look it up

https://www.cdc.gov/niosh/ventilation/faq/index.html

Why B is correct

300 × 60 / 9,000 = 2 ACH. The 60 converts minutes to hours. This is a measured-rate calculation, not a Texas classroom minimum.

7. A dwelling design assigns 25 cfm of outdoor air to Bedroom 1 and 35 cfm to Bedroom 2. Measurements are 30 cfm in each. Which statement is correct?

ABoth bedrooms meet their individual specified allocations.
The total matches 60 cfm, but Bedroom 2 is 5 cfm below its specified allocation.
CBedroom 1 is 5 cfm below its allocation.
DThe measured total is 70 cfm.

Where to look it up

Explicit exercise assumptions; not a universal code requirement.

Why B is correct

The combined flow is 60 cfm in both cases, but distribution differs. Bedroom 2 receives 30 rather than 35 cfm. A correct total does not prove each room meets its supplied design allocation.

8. A healthcare building reports a single total-VOC reading. What additional information is important before interpreting potential health effects?

AOnly whether the reading is below an assumed universal 100 mg/m³ limit.
The individual compounds, their concentrations and the exposure circumstances.
COnly the color of the sampling instrument.
DOnly the number of supply diffusers.

Where to look it up

https://www.epa.gov/indoor-air-quality-iaq/volatile-organic-compounds-impact-indoor-air-quality

Why B is correct

EPA describes VOC health effects as varying with chemical identity and exposure. A total alone cannot establish safety using an invented universal hospital threshold.

9. A kitchen design explicitly calls for 150 cfm of local exhaust discharged outdoors. A proposed recirculating hood returns all air to the room. Does it meet that stated exhaust requirement?

AYes; any internal fan counts as outdoor exhaust.
No; it does not provide the specified outdoor discharge.
CYes; its recirculating airflow can be counted twice.
DYes; the requirement disappears if only one person cooks.

Where to look it up

Explicit exercise assumptions; not a universal code requirement.

Why B is correct

Recirculation and outdoor discharge are different flow paths. The proposal fails the supplied requirement; this does not assert a universal kitchen airflow rate.

3 more in the bank

Answers and explanations for these are in the app.

What is the maximum allowable concentration of carbon monoxide (CO) in the breathing zone of employees in a commercial building according to the 2024 IMC?
What is the maximum allowable temperature rise of exhaust air from a kitchen hood according to the ACCA Manual D?
What is the recommended temperature for the condenser coil of a refrigeration unit according to Modern Refrigeration and Air Conditioning 22nd ed.?

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Texas Laws & Rules — Texas ACR A Practice Questions

Worked questions

1. A CO alarm activates near fuel-burning equipment. Which action is appropriate for an occupant?

2. A refrigeration energy exercise defines its performance ratio as useful cooling energy divided by electrical energy over the same period. Cooling is 240,000 Btu and electricity use is 20,000 Wh. What is the ratio?

3. In a water-heater energy exercise, useful heat delivered is 34,000 Btu and energy input is 40,000 Btu over the same test period. What is the delivered-energy fraction?

4. An office air handler supplies 2,000 cfm, of which 20% is measured outdoor air. What outdoor-air flow does that represent?

5. Under OSHA construction PPE requirements, what must an employer do when employees are exposed to hazards requiring protective equipment?

6. A classroom measurement gives 300 cfm of outdoor air and a room volume of 9,000 ft³. What outdoor-air change rate results?

7. A dwelling design assigns 25 cfm of outdoor air to Bedroom 1 and 35 cfm to Bedroom 2. Measurements are 30 cfm in each. Which statement is correct?

8. A healthcare building reports a single total-VOC reading. What additional information is important before interpreting potential health effects?

9. A kitchen design explicitly calls for 150 cfm of local exhaust discharged outdoors. A proposed recirculating hood returns all air to the room. Does it meet that stated exhaust requirement?

3 more in the bank

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