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Electrical Knowledge Flashcards

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

Read the first 7 Electrical Knowledge flashcards as text

  1. What is the purpose of a GFCI outlet?

    Answer: To cut power when it detects a ground fault

    A GFCI trips quickly when current leaks to ground, preventing shock.

  2. In a 240 V single-phase residential supply, how is the voltage typically derived?

    Answer: Two 120 V legs out of phase

    Two opposite 120 V hot legs combine to provide 240 V.

  3. What does an inductor oppose changes in?

    Answer: Current

    An inductor resists changes in current by storing energy in a magnetic field.

  4. What happens to total resistance when you add more resistors in series?

    Answer: It increases

    Series resistances add directly, so total resistance rises.

  5. A diode primarily allows current to flow in how many directions?

    Answer: One

    A diode conducts in only one direction and blocks the reverse.

  6. What is the main advantage of three-phase power over single-phase for motors?

    Answer: Smoother, more constant power delivery

    Three phases overlap to provide near-constant power and torque.

  7. What instrument measures the resistance of a de-energized circuit or component?

    Answer: Ohmmeter

    An ohmmeter (or multimeter on ohms) measures resistance.