Which of the following statements concerning...

Question 1 / 270705eccefa4bacbc34ba4d482b6

Question 1 of 270705eccefa4bacbc34ba4d482b6

Which of the following statements concerning the maintenance of solid-silver contacts in relays and auxiliary control circuits is correct?

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Question 1 of 27070

Which of the following statements concerning the maintenance of solid-silver contacts in relays and auxiliary control circuits is correct?

🔍 Key Concepts

• Proper maintenance of electrical contacts in control circuits • Characteristics and effects of silver oxide on solid-silver contacts • Why abrasive cleaning methods (wire wheels, coarse sandpaper, painting) can be harmful to contacts

💭 Think About

• Think about whether black silver oxide on solid-silver contacts is always harmful to electrical conductivity or sometimes acceptable. • Consider what happens to the flatness and alignment of contact surfaces if you use very aggressive tools like wire wheels, coarse sandpaper, or paint on them. • Ask yourself which option describes a method that restores the contact surface with the least damage while maintaining good electrical performance.

✅ Before You Answer

• Verify which choice avoids excessive abrasion or removal of contact material. • Check which method maintains the contact surface shape and alignment instead of deforming it. • Confirm whether black silver oxide on silver contacts is a conductor or an insulator before deciding if it must always be removed.

Question 1 of 27070

Which of the following statements concerning the maintenance of solid-silver contacts in relays and auxiliary control circuits is correct?

When necessary, they should always be dressed with a wire wheel.

They should be filed with a fine-cut file when projections extend beyond the contact surface.

When black silver oxide is present, it should always be removed from the contact surface with coarse sandpaper.

When necessary, they should be spray painted with electrical shellac

Question 1 / 270705eccefa4bacbc34ba4d482b6

Question 1 of 270705eccefa4bacbc34ba4d482b6

Which of the following statements concerning the maintenance of solid-silver contacts in relays and auxiliary control circuits is correct?

Back

Question 1 of 27070

Which of the following statements concerning the maintenance of solid-silver contacts in relays and auxiliary control circuits is correct?