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Heavy Duty Equipment Technician Red Seal Exam Prep · Question

On a wiring diagram, a square symbol with a wavy line inside typically represents which component?

A square symbol with a wavy line inside (or sometimes a series of humps) is the standard symbol for an inductor or coil in an electrical schematic. Resistors ar

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Question: On a wiring diagram, a square symbol with a wavy line inside typically represents which component?

Answer options:

  • Fuse
  • Resistor
  • Capacitor ✅ Inductor (coil)

Correct answer: Inductor (coil)

Explanation: A square symbol with a wavy line inside (or sometimes a series of humps) is the standard symbol for an inductor or coil in an electrical schematic. Resistors are typically zigzag lines, capacitors are parallel plates, and fuses are often a rectangle with a line through it.

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