engine wiper Interview Questions and Answers

1. What is the primary function of an engine wiper?

   • Answer: The primary function of an engine wiper is to remove oil, grease, and other debris from engine components, preventing contamination and ensuring proper engine operation.

2. How does an engine wiper differ from a windshield wiper?

   • Answer: Engine wipers operate in a high-temperature, high-pressure, and often oily environment, unlike windshield wipers. They are typically made of more robust materials and are designed for different cleaning actions.

3. What materials are commonly used in engine wipers?

   • Answer: Common materials include high-temperature resistant silicone rubber, specialized polymers, and various metal alloys for the wiper arm and blade components.

4. How is an engine wiper blade typically attached to its arm?

   • Answer: Attachment methods vary depending on the design, but common methods include clamping mechanisms, press-fit connections, and bolted connections.

5. Describe the different types of engine wiper systems.

   • Answer: Common types include single-arm wipers, dual-arm wipers, and wipers with integrated cleaning nozzles. Some systems use air pressure for cleaning, while others use mechanical wiping action.

6. What are the common failure modes of engine wipers?

   • Answer: Common failures include blade wear and tear, arm breakage, motor failure (for motorized wipers), and issues with the wiper linkage or mounting system.

7. How is the effectiveness of an engine wiper assessed?

   • Answer: Effectiveness is assessed by visual inspection of cleaned surfaces and measurement of residual oil or contaminant levels. Testing under operational conditions is also common.

8. What are the safety considerations associated with engine wiper maintenance?

   • Answer: Safety considerations include ensuring the engine is cool and off before maintenance, using appropriate personal protective equipment (PPE), and following proper lockout/tagout procedures.

9. How often should engine wipers be inspected and replaced?

   • Answer: Inspection frequency depends on operating conditions but should be at least during routine engine maintenance. Replacement is needed when wear is evident, typically every 6-12 months or as needed.

10. Explain the importance of proper engine wiper blade pressure.

    • Answer: Proper pressure ensures effective cleaning without excessive wear on the blade or damage to the engine components. Insufficient pressure results in poor cleaning, while excessive pressure leads to premature blade failure.

11. What is the role of the wiper arm pivot point?

    • Answer: The pivot point allows for the wiper arm to move across the engine component, providing the necessary range of motion for cleaning.

12. How do temperature variations affect engine wiper performance?

    • Answer: Extreme temperatures can affect the material properties of the wiper blade, potentially causing hardening or softening, impacting its effectiveness and lifespan.

13. What are some common causes of streaking or incomplete cleaning by an engine wiper?

    • Answer: Common causes include a worn or damaged wiper blade, incorrect blade pressure, buildup of contaminants on the blade, or inadequate wiping action due to mechanical issues.

14. How does the design of an engine wiper affect its cleaning efficiency?

    • Answer: Design features such as blade shape, material, pressure distribution, and arm geometry all contribute to the cleaning efficiency of an engine wiper.

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