Which of the following symptoms may indicate a malfunction of the air compressor of the brake system in the bus?
Show the correct answer
Correct answer
B. Reduced pressure in the pneumatic system.
Explanation
The question is about a symptom of a faulty air compressor in the brake system of a bus. It is shown by reduced pressure in the pneumatic system - answer B.
The Road Traffic Act requires a vehicle to be maintained so that using it does not endanger safety. The compressor, driven by the engine, pumps air into the air tanks - when it stops working or works poorly, the pressure on the gauge rises too slowly or drops with each braking and does not return to normal, and a warning light on the dashboard may come on. A hiss in the diaphragm actuator during braking (answer A) indicates a leak in the actuator, not in the compressor. A sudden increase in pressure (answer C) would rather mean a failure of the pressure regulator. If the pressure is too low, you do not drive off, and while driving you stop in a safe place.
Legal basis: Art. 66 para. 1 point 1 and 5 of the Road Traffic Act (Prawo o ruchu drogowym)