Practice question

What is the function of the yellow diamond-shaped push-pull knob on a heavy commercial vehicle dashboard?

  1. Air horn control
  2. Parking brake control valve (pull to apply parking brakes, push to release)
  3. Engine oil pump primer
  4. Differential cross-lock engagement

Answer: B — Parking brake control valve (pull to apply parking brakes, push to release)

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Practice more: Bahrain Heavy Vehicle Theory Practice Questions - Bahrain Heavy Vehicle Driving Licence Theory Test (Private Transport and Special Use classes) Exam →