Practice question

What are the two standard pneumatic connection lines between a truck tractor and a semi-trailer in Belarus?

  1. High voltage line and low voltage line
  2. Supply / emergency line (red coupling) and service brake control line (yellow coupling)
  3. Coolant line and oil line
  4. Fuel delivery line and fuel return line

Answer: B — Supply / emergency line (red coupling) and service brake control line (yellow coupling)

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