During its operation, loud buzzing and...

Question 1 / 2066636eed28f7522a1c51d879

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 20

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?

low insulation resistance to ground

overheating of the contactor coil

lubrication of the contact bearing points

low voltage on the operating coil

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Question 1 / 2066636eed28f7522a1c51d879

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