All of these may cause windshield wiper chatter except which?

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Multiple Choice

All of these may cause windshield wiper chatter except which?

Explanation:
Chatter happens when the blade can’t maintain smooth, consistent contact with the windshield, causing it to vibrate as it wipes. Worn blades have a rough, uneven edge that skims and vibrates; a loose linkage lets the arm and blade loosen their synchronization, producing a wobble; a damaged wiper motor can deliver irregular torque or speed, making the blade shake. Improper position, while it can lead to streaking or poor wiping because the blade isn’t aligned correctly, doesn’t typically cause the vibrating chatter pattern. So improper position is the exception.

Chatter happens when the blade can’t maintain smooth, consistent contact with the windshield, causing it to vibrate as it wipes. Worn blades have a rough, uneven edge that skims and vibrates; a loose linkage lets the arm and blade loosen their synchronization, producing a wobble; a damaged wiper motor can deliver irregular torque or speed, making the blade shake. Improper position, while it can lead to streaking or poor wiping because the blade isn’t aligned correctly, doesn’t typically cause the vibrating chatter pattern. So improper position is the exception.

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