What symptom indicates a malfunction of the power steering system in a bus?

Explanation

Correct answer: Significantly increased resistance of the steering wheel movement.

The function of the power assistance system is to reduce the force the driver must apply to turn the steering wheel, which is crucial in large vehicles such as a bus. In the event of a failure of this system, the power assistance is lost, and the driver must overcome the full resistance of the steering mechanism and the tyres. This results in the need to use significantly more force, which is felt as a sudden increase in resistance on the steering wheel.

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