Practice Test Geeks(313D) Residential Air Conditioning Systems Mechanic Certification Practice Test
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Safety and Regulations Flashcards

7 cards from real 313D practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Safety and Regulations flashcards as text

  1. Which federal agency administers the Section 608 refrigerant management regulations that residential HVAC technicians must comply with?

    Answer: EPA

    The U.S. Environmental Protection Agency (EPA) administers Section 608 of the Clean Air Act, which regulates the use and recovery of refrigerants.

  2. What is the correct procedure if a technician suspects a refrigerant leak in a residential space before beginning work?

    Answer: Ventilate the area and check for ignition sources before proceeding

    The technician should ventilate the space to dilute any refrigerant concentration and eliminate ignition sources before beginning leak detection or repair work.

  3. Under NEC Article 440, the branch circuit for a residential A/C unit must be sized at a minimum of what percentage of the equipment's rated load current?

    Answer: 125%

    NEC Article 440 requires the branch circuit for A/C equipment to have an ampacity of not less than 125% of the equipment's rated load current.

  4. Which refrigerant is classified as an A2L (mildly flammable) refrigerant and is commonly used in new residential systems?

    Answer: R-32

    R-32 is classified as A2L (low toxicity, mildly flammable) and is increasingly used in residential systems due to its lower GWP compared to R-410A.

  5. A technician is lifting a heavy condensing unit. According to OSHA guidelines, when should a mechanical lifting aid be used instead of manual lifting?

    Answer: When the load exceeds 50 lbs or safe lifting posture cannot be maintained

    OSHA ergonomic guidance recommends mechanical assists for loads over 50 lbs or when proper lifting posture cannot be maintained, reducing musculoskeletal injury risk.

  6. What is the primary purpose of pressure-testing a refrigerant system with dry nitrogen before adding refrigerant?

    Answer: To check system leak integrity without using regulated refrigerant

    Pressure-testing with dry nitrogen confirms the system is leak-free using a non-regulated, inexpensive gas before introducing environmentally controlled refrigerant.

  7. Which document defines the safe refrigerant charge limits per occupancy type in machinery rooms and occupied spaces under U.S. standards?

    Answer: ASHRAE Standard 15 and ASHRAE 34

    ASHRAE Standard 15 establishes refrigerant concentration limits per occupancy, while ASHRAE Standard 34 provides refrigerant classifications and safety group designations.