What colour is the auxiliary line on a three-line braking system? Mark one answer
A Blue
B Green
C Red
D Yellow
Answer:A
What colour is the auxiliary line on a three-line braking system? Mark one answer
A Blue B Green C Red D Yellow
Explanation: If you're driving an articulated vehicle or a trailer combination, it's vital that you understand the rules that apply to coupling and uncoupling the brake lines. If you take a practical driving test with a trailer, you'll be expected to demonstrate this during the test. The lines are colour-coded: red is the emergency line, blue is the auxiliary line and yellow is the service line. They must be connected strictly in accordance with the correct procedure.