What is the max speed for the windshield wipers?

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Multiple Choice

What is the max speed for the windshield wipers?

Explanation:
Windshield wipers are built to operate safely only up to a defined airspeed. Beyond that speed, aerodynamic forces and the wiper mechanism can stress the windshield and hardware, leading to wear or damage and reduced wiping effectiveness. Therefore the highest approved airspeed for running the wipers is 250 knots. The other values are either lower than the limit (still safe but not the maximum) or exceed it (not permitted). So 250 knots is the correct maximum.

Windshield wipers are built to operate safely only up to a defined airspeed. Beyond that speed, aerodynamic forces and the wiper mechanism can stress the windshield and hardware, leading to wear or damage and reduced wiping effectiveness. Therefore the highest approved airspeed for running the wipers is 250 knots. The other values are either lower than the limit (still safe but not the maximum) or exceed it (not permitted). So 250 knots is the correct maximum.

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