Practice question

In an Electronic Braking System (EBS) fitted to a modern bus, what is the role of the pneumatic backup circuit?

It inflates the driver's pneumatic seat when braking heavily
It operates the pneumatic door opening cylinders in an emergency
It provides a conventional dual-circuit pneumatic brake application if electronic sensors or control units fail
It sprays pressurized air onto the brake discs to cool them down

Answer: C — It provides a conventional dual-circuit pneumatic brake application if electronic sensors or control units fail

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