Practice Test Geeks(EETC) Electrical Technician Certification Practice Test
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Circuit Design & Troubleshooting Flashcards

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

Read the first 7 Circuit Design & Troubleshooting flashcards as text

  1. A class-A amplifier operates with the transistor conducting for what portion of the input signal cycle?

    Answer: 100%

    In class-A operation, the transistor is biased to conduct continuously throughout the entire 360° of the input signal cycle.

  2. What does a megohmmeter (megger) primarily measure in electrical troubleshooting?

    Answer: Insulation resistance between conductors and ground

    A megohmmeter applies high DC voltage (typically 500–5000V) to measure insulation resistance, detecting degraded or failed insulation.

  3. In a full-wave bridge rectifier, how many diodes conduct simultaneously during each half-cycle?

    Answer: 2

    During each half-cycle of a bridge rectifier, current flows through exactly two diodes—one on the top and one on the bottom of the bridge.

  4. When designing a PCB for high-frequency circuits, why should ground planes be used?

    Answer: To reduce electromagnetic interference and provide a low-inductance return path

    Ground planes provide a low-impedance, low-inductance return path for currents and reduce EMI by shielding signal traces.

  5. A technician notices that a voltage regulator IC is very hot to the touch even with a minimal load. What is the most likely cause?

    Answer: Excessive input-to-output voltage differential across the regulator

    Linear regulators dissipate power equal to (Vin − Vout) × Iload, so a large input-to-output differential causes high heat even at low currents.

  6. In an RC timing circuit using a 555 timer in monostable mode, increasing the resistor value will:

    Answer: Increase the output pulse width

    The output pulse width in monostable mode is t = 1.1 × R × C; increasing R directly increases the time constant and pulse width.

  7. What troubleshooting method involves injecting a known signal at a circuit's input and tracing it toward the output?

    Answer: Signal injection from input to output

    Signal injection introduces a test signal at the input and follows it stage by stage toward the output, identifying where the signal is lost or distorted.