car wiper Interview Questions and Answers

1. What is the primary function of a car wiper?

   • Answer: To clear rain, snow, ice, and other debris from the windshield, ensuring clear visibility for the driver.

2. How do car wipers work mechanically?

   • Answer: A motor drives a linkage system that moves the wiper arms across the windshield in a wiping motion. The arms are connected to blades that contain rubber or silicone elements to effectively clear the glass.

3. What are the different types of wiper blades?

   • Answer: Common types include conventional (metal frame), beam (single-piece), and hybrid blades. Each offers varying degrees of performance and durability.

4. What materials are wiper blades typically made of?

   • Answer: Rubber and silicone are the most common materials for the wiping element, while the frame may be made of metal, plastic, or a combination.

5. How often should wiper blades be replaced?

   • Answer: Generally, every 6-12 months, or sooner if they show signs of wear like streaking, skipping, or tearing.

6. What are the signs that a wiper blade needs replacing?

   • Answer: Streaking, chattering, skipping, squeaking, tearing, or leaving smears on the windshield.

7. How do you choose the correct wiper blades for your car?

   • Answer: Check your owner's manual or use a wiper blade size guide. The guide usually requires the car make, model and year.

8. What is the function of the wiper motor?

   • Answer: The wiper motor provides the power to move the wiper arms across the windshield.

9. What are the common problems with wiper motors?

   • Answer: Worn-out brushes, faulty electrical connections, or internal mechanical failure.

10. How do you troubleshoot a malfunctioning wiper system?

    • Answer: Check fuses, wiring, the motor itself, and the linkage system for any damage or obstructions.

11. What is the role of the wiper fluid reservoir?

    • Answer: It stores the windshield washing fluid that is used in conjunction with the wipers.

12. What type of fluid should be used in the wiper fluid reservoir?

    • Answer: Windshield washer fluid, which is designed to clean and remove grime and bugs from the windshield. Some fluids offer de-icing properties as well.

13. What happens if you run out of wiper fluid?

    • Answer: The wipers will still function, but they won't be cleaning the windshield, leading to reduced visibility.

14. How does the intermittent wiper function work?

    • Answer: An electronic control unit regulates the timing between wiper sweeps, adjusting the frequency depending on the rain sensor or user-selected setting.

15. What is a rain sensor?

    • Answer: A sensor that detects the presence and intensity of rain, automatically adjusting the wiper speed accordingly.

16. How does a heated wiper system work?

    • Answer: Electric heating elements incorporated into the wiper blades or arms melt ice and snow, ensuring effective operation in cold weather.

17. What are the advantages of using silicone wiper blades?

    • Answer: Silicone blades often last longer, perform better in extreme temperatures, and offer smoother operation compared to rubber blades.

18. What is the difference between a beam blade and a conventional blade?

    • Answer: Beam blades have a single, streamlined design, whereas conventional blades have a metal frame with rubber inserts. Beam blades often provide better aerodynamic performance and cleaner wiping.

19. Can you repair a damaged wiper blade?

    • Answer: Minor damage, such as a small tear, might be temporarily addressed, but often it's more cost-effective to replace the entire blade.

20. How do you install new wiper blades?

    • Answer: The method varies depending on the blade type and vehicle, but generally involves releasing the old blade's connection and snapping in the new one.

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