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Practice quizzes / IN CDL Combination Practice Questions - Indiana CDL Combination Vehicles Test Exam / Question 104135
Practice question

What is the trailer hand valve mainly used for in CDL manual combination context?

  1. Parking overnight
  2. Normal braking on every stop
  3. Testing trailer brakes
  4. Unlocking the fifth wheel

Answer: C — Testing trailer brakes

The correct answer is shown above. Try the full quiz for additional practice.

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