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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The acetylene cylinder valve is never opened more than

  1. One full turn

  2. One-quarter turn

  3. One-eighth turn

  4. Half turn

The correct answer is: Half turn

The reason for this is that the acetylene gas inside the cylinder is highly flammable and can ignite easily if exposed to air. By limiting the number of turns, it reduces the chance of gas leaks and potential danger. One full turn (Option A) would open the valve too much, allowing a larger amount of gas to escape. One-quarter turn (Option B) and one-eighth turn (Option C) may not be enough to effectively open the valve. Ultimately, a half turn (Option D) is the safest option as it provides enough space to open the valve while also minimizing the risk of accidents.

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