How can the loss of residual magnetism in an...

Question 1 / 205eccefa3bacbc34ba4d48033

Question 1 of 205eccefa3bacbc34ba4d48033

How can the loss of residual magnetism in an alternator with a brushless excitation system be corrected?

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Question 1 of 20

5eccefa3bacbc34ba4d48033

How can the loss of residual magnetism in an alternator with a brushless excitation system be corrected?

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🔍 Key Concepts

• Residual magnetism and why an alternator needs it to start building voltage • How a brushless excitation system gets DC into the rotating field without slip rings • What "flashing the field" means in generator maintenance

💭 Think About

• Which of these actions actually introduces an external DC source into the field circuit so magnetism can be re‑established? • Do any of the options involving just running the machine (speed or direction) actually add new magnetism if there is none left to begin with? • In normal troubleshooting practice, what do technicians do when a generator will not build up voltage because of lost residual magnetism?

✅ Before You Answer

• Identify which choice directly applies DC from a separate source to the field circuit. • Eliminate options that only change speed or direction but do not provide an external excitation source. • Recall that "flashing the field" is a standard procedure described in generator maintenance manuals for restoring residual magnetism.

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Question 1 of 20

How can the loss of residual magnetism in an alternator with a brushless excitation system be corrected?

using a storage battery or battery charger to "flash" the field

running the rotor in the opposite direction for 5 minutes

running the generator at normal speed with the field rheostat fully counterclockwise

allowing the generator to run at 10% of normal speed for 5 minutes

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Question 1 / 205eccefa3bacbc34ba4d48033

Question 1 of 205eccefa3bacbc34ba4d48033

How can the loss of residual magnetism in an alternator with a brushless excitation system be corrected?

Back

Question 1 of 20

5eccefa3bacbc34ba4d48033

How can the loss of residual magnetism in an alternator with a brushless excitation system be corrected?

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