Practice Test Geeks(RSES) Refrigeration Service Engineers Society Certification Practice Test
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Safety Procedures Flashcards

7 cards from real RSES 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 Procedures flashcards as text

  1. What is the purpose of a lockout/tagout (LOTO) procedure when servicing refrigeration equipment?

    Answer: To ensure hazardous energy is isolated before work begins so equipment cannot be accidentally energized

    LOTO procedures isolate all hazardous energy sources—electrical, mechanical, pneumatic—before service begins, preventing accidental startup that could injure technicians.

  2. When recovering refrigerant from a system, the recovery cylinder should NEVER exceed what percentage of its listed water capacity by weight?

    Answer: 80%

    DOT regulations require recovery cylinders to be filled to no more than 80% of their water capacity by weight to allow for liquid expansion and prevent overpressure.

  3. Which type of fire extinguisher is appropriate for an electrical fire involving a refrigeration system's control panel?

    Answer: Class C CO2 or dry chemical extinguisher

    Class C extinguishers (CO2 or dry chemical) are non-conductive and safe for use on energized electrical equipment; water or foam would create electrocution hazards.

  4. A technician is about to perform a nitrogen pressure test on a newly assembled refrigerant circuit. What critical safety device must be installed before pressurizing?

    Answer: A pressure relief valve or safety valve rated for the test pressure

    A pressure relief valve must be installed before any pressure test to prevent catastrophic failure if the circuit is over-pressurized during the test.

  5. R-410A refrigerant systems operate at significantly higher pressures than R-22 systems. What is the primary safety implication for technicians?

    Answer: All hoses, gauges, and fittings used must be rated for the higher operating pressures

    R-410A systems operate at approximately 60% higher pressures than R-22; all service tools and fittings must be rated for these pressures to prevent equipment failure and injury.

  6. What does the NFPA 704 diamond (hazard diamond) on a refrigerant storage area indicate?

    Answer: Health, flammability, instability, and special hazard ratings for stored materials

    The NFPA 704 diamond provides first responders and workers with a quick reference for health (blue), flammability (red), instability (yellow), and special hazard (white) ratings.

  7. When handling liquid refrigerant, what type of personal protective equipment is most critical to prevent cryogenic burns?

    Answer: Insulated gloves and face shield or chemical splash goggles

    Liquid refrigerant can cause cryogenic burns on contact with skin and eyes; insulated gloves and a face shield protect against splashes during transfer or connection.