Practice Test Geeks(CPT) Certified Production Technician Practice Test
← All CPT Flashcard Decks

Electrical & Mechanical Fundamentals Flashcards

7 cards from real CPT 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 & Mechanical Fundamentals flashcards as text

  1. What does 'NEMA enclosure rating' classify for electrical equipment?

    Answer: The degree of protection against environmental hazards like dust and moisture

    NEMA enclosure ratings define the level of protection an electrical enclosure provides against environmental conditions such as dust, water, oil, and corrosive agents.

  2. In a chain drive system, what maintenance practice is most critical for extending chain and sprocket life?

    Answer: Maintaining proper lubrication and chain tension

    Proper lubrication reduces metal-to-metal contact and wear, while correct tension prevents impact loading and skipping that accelerates sprocket tooth wear.

  3. A capacitor in an AC circuit causes current to:

    Answer: Lead voltage by 90 degrees

    In a purely capacitive AC circuit, current leads voltage by 90 degrees because the capacitor charges and discharges in opposition to voltage changes.

  4. What is the purpose of a shear pin or torque limiter in mechanical power transmission?

    Answer: Intentionally fail to protect machinery from overload damage

    Shear pins and torque limiters are designed to be the weakest point in a drive train, intentionally breaking or slipping before overload forces damage expensive equipment.

  5. When performing lockout/tagout (LOTO), which energy source is often overlooked beyond electrical?

    Answer: Stored mechanical energy (springs, elevated loads, pressure)

    Stored mechanical energy in compressed springs, elevated machine components, and pressurized pneumatic or hydraulic systems must be released or blocked before LOTO is considered complete.

  6. What does a megohmmeter (megger) test measure in electrical maintenance?

    Answer: Insulation resistance of motors and cables

    A megohmmeter applies high DC voltage (typically 500–1000V) to measure insulation resistance in megaohms, detecting degraded insulation that could cause shorts or ground faults.

  7. In hydraulic systems, what is the purpose of an accumulator?

    Answer: Store hydraulic energy under pressure for supplemental flow or emergency use

    A hydraulic accumulator stores pressurized fluid using a gas charge or spring, providing supplemental flow during peak demand, dampening pressure spikes, and enabling emergency operation.