Practice Test Geeks(MTC) Marine Technician Certification Practice Test
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Marine Technician Electrical & Electronics Flashcards

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

Read the first 7 Marine Technician Electrical & Electronics flashcards as text

  1. What is 'galvanic corrosion' in a marine electrical context?

    Answer: Electrochemical deterioration when two dissimilar metals are electrically connected in an electrolyte

    Galvanic corrosion occurs when dissimilar metals form an electrochemical cell in seawater, causing the more active (anodic) metal to corrode preferentially.

  2. The NMEA 2000 (N2K) network uses which physical layer standard?

    Answer: CAN bus (Controller Area Network)

    NMEA 2000 is built on the CAN bus physical layer, allowing multiple devices to share data on a single backbone cable.

  3. When testing a marine battery with a load tester, a fully charged 12V battery that drops below _______ under load is considered failed.

    Answer: 10.5V

    A healthy 12V battery should maintain at or above 10.5V under a half-rated load test for 15 seconds; below that indicates sulfation or cell failure.

  4. A marine autopilot's fluxgate compass measures:

    Answer: The Earth's magnetic field to determine heading

    A fluxgate compass detects the horizontal component of Earth's magnetic field using inductive coils to determine the vessel's magnetic heading.

  5. Shore power reverse polarity on a 120V AC system is MOST dangerous because it:

    Answer: Energizes the neutral conductor, creating shock hazard even with devices switched off

    Reverse polarity puts line voltage on the neutral, meaning equipment chassis and switch contacts that appear 'off' can still be energized at full voltage.

  6. What is the function of a marine isolation transformer in shore power systems?

    Answer: Electrically separates the boat's AC system from shore ground, eliminating stray current corrosion

    An isolation transformer breaks the galvanic connection between shore ground and the boat's bonding system, preventing stray current corrosion.

  7. What does 'AIS' stand for in marine electronics?

    Answer: Automatic Identification System

    AIS (Automatic Identification System) transmits and receives vessel identity, position, speed, and course data via VHF radio for collision avoidance.