Practice Test Geeks(EGSA) Electrical Generating Systems Association Certified Practice Test
← All EGSA Flashcard Decks

Load Bank Testing Flashcards

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

Read the first 7 Load Bank Testing flashcards as text

  1. What effect does high ambient temperature have on a diesel generator's output during a load bank test?

    Answer: It reduces the generator's output capacity due to derating

    High ambient temperatures reduce air density, causing the engine to derate (produce less power) due to reduced oxygen intake.

  2. Which type of load bank is required to test a generator's response to a load with a 0.8 lagging power factor?

    Answer: Resistive/reactive (inductive) combination

    A combined resistive/reactive load bank is needed to produce a lagging power factor load that simulates real inductive equipment.

  3. During load bank testing, oil pressure falls below the low-oil-pressure shutdown setpoint. The correct response is to:

    Answer: Allow the engine to shut itself down automatically

    Low oil pressure is a critical fault; the engine's automatic shutdown protects it from catastrophic bearing and internal damage.

  4. What does the term 'transient response' refer to in generator load bank testing?

    Answer: The generator's voltage and frequency behavior during sudden load changes

    Transient response describes how quickly and accurately the generator recovers voltage and frequency after a sudden load step change.

  5. Per NFPA 110, what is the required full-load test duration for a Level 1 emergency generator under load?

    Answer: 2 hours

    NFPA 110 requires Level 1 emergency generators to be exercised under load for a minimum of 2 hours at least monthly.

  6. A generator produces 480V at no load but 455V at full load. The voltage regulation percentage is approximately:

    Answer: 5.2%

    Voltage regulation = (480-455)/480 × 100 = 5.2%, which falls within acceptable limits for most standby generators.

  7. Which condition would cause a generator to fail a load bank acceptance test even if it runs at full load without shutting down?

    Answer: Voltage regulation exceeding manufacturer's specification

    Voltage regulation outside manufacturer specifications indicates AVR or alternator problems that make the unit unacceptable for service.