Practice Test Geeks(ITMC) Industrial Technology Maintenance Certification Practice Test
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Electrical & Electronic Systems Flashcards

7 cards from real ITMC 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 & Electronic Systems flashcards as text

  1. Which test is used to verify proper operation of a ground fault circuit interrupter (GFCI) receptacle in an industrial maintenance shop?

    Answer: Press the TEST button and verify the receptacle de-energizes, then press RESET

    The TEST button simulates a ground fault; the GFCI should trip immediately, and the RESET button should restore power, confirming proper operation.

  2. A technician is calibrating a 4-20 mA pressure transmitter with a range of 0-100 PSI. What current output should be verified at 50 PSI?

    Answer: 12 mA

    At 50% of span, the output should be at 50% of the 16 mA span (20-4=16), so 4 + (0.5 × 16) = 4 + 8 = 12 mA.

  3. What is the most common cause of overheating in electrical panel bus bars and connection points?

    Answer: Loose or high-resistance connections causing I²R heating

    Loose or corroded connections increase contact resistance; since heat dissipation follows P = I²R, even small resistance increases cause significant localized heating.

  4. An electric motor's nameplate shows 'S.F. 1.15'. What does this mean for maintenance planning?

    Answer: The motor can operate continuously at 115% of rated load without damage

    Service Factor (S.F.) 1.15 means the motor can handle 115% of its rated nameplate horsepower on a continuous basis under standard conditions.

  5. When performing an arc flash hazard analysis, the two primary factors that determine incident energy are:

    Answer: Available fault current and arcing duration (clearing time)

    Incident energy (cal/cm²) is proportional to both the magnitude of available fault current and the time the arc is sustained before the protective device clears it.

  6. A solid-state relay (SSR) is controlling a 480V heating element. The SSR feels hot during normal operation. What is the most appropriate corrective action?

    Answer: Verify load current is within SSR rating and ensure adequate heatsinking

    SSRs have a forward voltage drop (~1-1.5V) that causes I²V heat dissipation; proper heatsinking is mandatory, and overheating usually indicates undersized heatsinks or exceeded current ratings.

  7. During preventive maintenance on a servo drive system, technician notices DC bus capacitors that are bulging on top. The recommended action is:

    Answer: Discharge the bus fully and replace the capacitors immediately

    Bulging electrolytic capacitors indicate internal pressure from venting gas, a sign of imminent failure; the bus must be safely discharged and capacitors replaced before further operation.