AG Mechanics CDE Practice Exam

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Prepare for the AG Mechanics CDE Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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When measuring the spark plug gap, a __________ should be used.

  1. micrometer

  2. ruler

  3. tape measure

  4. wire or round feeler gauge

The correct answer is: wire or round feeler gauge

When measuring the spark plug gap, it is essential to use a wire or round feeler gauge. This type of gauge is specifically designed for measuring small gaps accurately, making it the ideal tool for checking and adjusting the gap on a spark plug. A micrometer is typically used for precise measurements of larger objects and would not be suitable for measuring the small gap on a spark plug. A ruler or tape measure are designed for measuring lengths and are not precise enough for measuring the small gap on a spark plug. Therefore, the correct tool to use when measuring the spark plug gap is a wire or round feeler gauge.

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