During its operation, loud buzzing and...

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Question 1 of 2066636eed28f7522a1c51d879

During its operation, loud buzzing and resultant welding of contacts of a magnetic relay may occur. Which of the following would be the likely cause?

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Question 1 of 20

66636eed28f7522a1c51d879

During its operation, loud buzzing and resultant welding of contacts of a magnetic relay may occur. Which of the following would be the likely cause?

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🔍 Key Concepts

• Magnetic relay operation and how the coil creates a magnetic field to pull in the armature • Effect of supply voltage level on magnetic pull and contact chatter/buzzing • How mechanical condition (lubrication, bearings, overheating) typically shows up in symptoms compared to electrical issues

💭 Think About

• Think about what would cause the relay armature to not be held firmly against the pole face, allowing it to vibrate or chatter and make a buzzing sound • Consider which option would reduce the magnetic force produced by the coil, and how that might lead to arcing and eventual welding of contacts • Ask yourself: which of these conditions is most directly related to the strength and steadiness of the electromagnetic field in the relay coil?

✅ Before You Answer

• Identify which choice directly affects magnetic pull of the coil rather than insulation or mechanical wear alone • Check which condition is most likely to cause chattering/buzzing as the contacts repeatedly make and break instead of closing firmly • Verify which option could reasonably lead to arcing and contact welding because of repeated, unstable closing rather than a one-time failure

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Question 1 of 2066636eed28f7522a1c51d879

During its operation, loud buzzing and resultant welding of contacts of a magnetic relay may occur. Which of the following would be the likely cause?

Back

Question 1 of 20

66636eed28f7522a1c51d879

During its operation, loud buzzing and resultant welding of contacts of a magnetic relay may occur. Which of the following would be the likely cause?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed