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Piping — Texas ACR A Practice Questions

12 questions · 5% of the Texas ACR A exam

Worked questions

1. A code inspector is reviewing the ventilation system of a residential home. The home has a crawl space. What is the minimum ventilation area required for a crawl space according to the 2024 UMC?

  • A0.5 square foot per linear foot of crawl space
  • 1 square foot per linear foot of crawl space
  • C1.5 square feet per linear foot of crawl space
  • D2 square feet per linear foot of crawl space

Exam tip

Ensure compliance with the minimum ventilation requirements for different types of spaces.

Why B is correct

The 2024 UMC requires a minimum ventilation area of 1 square foot per linear foot of crawl space to ensure proper air exchange and prevent moisture buildup.

2. A contractor is designing a piping system for a chemical processing plant. The system needs to handle a flow rate of 500 gallons per minute at a pressure of 150 psi. Which pipe size should be used according to the 2024 IMC?

  • A2-inch pipe
  • B3-inch pipe
  • 4-inch pipe
  • D5-inch pipe

Exam tip

Always consider both flow rate and pressure when selecting pipe size.

Why C is correct

The correct pipe size is determined by calculating the velocity and pressure drop. A 4-inch pipe is typically used for flows up to 500 gallons per minute at 150 psi, as per the 2024 IMC.

3. A contractor is installing a new refrigerant piping system in an industrial facility. Which type of piping material is required for refrigerant lines carrying ammonia, according to the 2024 IMC?

  • ACarbon steel
  • BStainless steel
  • Copper
  • DGalvanized steel

Exam tip

Always refer to the specific requirements for refrigerant piping materials in the IMC, as they differ from general piping codes.

Why C is correct

The 2024 IMC requires that refrigerant lines carrying ammonia must be made of copper or other approved materials due to ammonia's corrosive nature. Carbon steel, stainless steel, and galvanized steel are not suitable for ammonia lines.

5. A public building is undergoing a renovation, and new refrigerant piping is being installed. The piping will pass through a fire-rated wall. According to the Texas Administrative Code Chapter 75, what is the minimum clearance required between the piping and the fire-rated wall?

  • A1 inch
  • 2 inches
  • C3 inches
  • D4 inches

Exam tip

Always check the specific requirements of the Texas Administrative Code for local regulations that may differ from national codes.

Why B is correct

The Texas Administrative Code Chapter 75 specifies that when refrigerant piping passes through a fire-rated wall, a minimum clearance of 2 inches is required to maintain the integrity of the fire rating.

6. During a routine inspection, a code inspector notices that the air distribution system in a commercial building has gaps in the ductwork. What is the minimum requirement for air ductwork according to the 2024 IFGC?

  • No gaps allowed
  • BGaps up to 1/4 inch are acceptable
  • CGaps up to 1/2 inch are acceptable
  • DGaps up to 3/4 inch are acceptable

Exam tip

Ensure all ductwork is sealed properly to maintain system efficiency.

Why A is correct

According to the 2024 IFGC, air ductwork must be free of gaps to prevent air leakage. There are no acceptable gaps in the ductwork.

7. During a routine inspection of the HVAC system in a commercial building, a code-inspector finds that the refrigerant piping has visible signs of corrosion. What action should the inspector take, according to the 2024 IFGC?

  • AOrder a complete replacement of the piping system
  • Issue a notice of deficiency
  • CPerform a visual inspection only
  • DRequest a maintenance contract

Exam tip

Remember that deficiencies in refrigerant piping systems are subject to immediate action requirements.

Why B is correct

The 2024 IFGC requires that any visible signs of corrosion in refrigerant piping systems must be addressed immediately. The correct action is to issue a notice of deficiency to the owner or contractor.

5 more in the bank

Answers and explanations for these are in the app.

  • A contractor is selecting piping materials for a high-temperature fluid system. Which material is most suitable for high-temperature applications according to the Texas Occupations Code Chapter 1302?
  • A hotel is planning to install a new fire protection system. Which type of fire sprinkler system is most suitable for a hotel according to the 2024 IMC?
  • A refrigeration system in a food service establishment is experiencing refrigerant leaks. Which type of refrigerant is most commonly used in commercial refrigeration systems according to the 22nd edition of Modern Refrigeration and Air Conditioning?
  • A residential complex is being designed with a refrigeration system that will be installed underground. Which factor should be considered most carefully during the design phase, according to the 2024 UMC?
  • An air conditioning system in an office building is malfunctioning. Which component is most likely the cause of the malfunction, according to the ACCA Manual D?

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