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Electrical Systems & Controls Flashcards

9 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 9 Electrical Systems & Controls flashcards as text

  1. What is the function of a contactor in a refrigeration system?

    Answer: Control high-voltage circuits

    It acts as a switch to control high-voltage components.

  2. What is the purpose of a capacitor in a motor circuit?

    Answer: Boost motor performance

    To provide a starting or running boost for motors.

  3. Which device protects the system from electrical overload?

    Answer: Fuse or breaker

    A fuse or circuit breaker cuts off current when it exceeds safe limits.

  4. Why is grounding important in electrical systems?

    Answer: Prevent electrical shocks

    To ensure user safety and prevent electrical shocks.

  5. What is the role of a thermostat?

    Answer: Regulates temperature

    It senses temperature and controls the system accordingly.

  6. How is a relay used in a control system?

    Answer: Switches circuits

    It opens or closes circuits based on control signals.

  7. Why use color-coded wiring?

    Answer: To maintain safety and standards

    To ensure correct and safe electrical connections.

  8. What tool measures voltage and current?

    Answer: Multimeter

    A multimeter is used to test electrical circuits.

  9. Why must circuit diagrams be followed?

    Answer: Ensure proper wiring

    They provide the correct wiring and operation layout.

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Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. cdn.ymaws.com — Test delivery, retake fee, score release, time limit · verified Oct 2026
  2. rses.org — Eligibility, fees, exam format, passing score, retake policy · verified Oct 2026