D.C. propulsion motor brush pressure depends...

Question 1 / 205eccefa3bacbc34ba4d480a0

Question 1 of 205eccefa3bacbc34ba4d480a0

D.C. propulsion motor brush pressure depends on the brush grade used. In practice with what device is the proper brush pressure established?

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5eccefa3bacbc34ba4d480a0

D.C. propulsion motor brush pressure depends on the brush grade used. In practice with what device is the proper brush pressure established?

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🔍 Key Concepts

• Brush pressure is a mechanical force applied to the brushes on a commutator, not an electrical quantity. • Think about instruments that measure mechanical force or weight versus those that measure electrical or fluid pressure. • DC motor maintenance often uses simple mechanical tools to check spring tension or contact pressure.

💭 Think About

• Which of these devices is designed to directly measure a pulling or pushing force in pounds or newtons? • Which devices in the list are mainly used for electrical measurements or fluid pressure measurements, and therefore would NOT be suitable for checking how hard a brush is pressed? • When a technician adjusts brush pressure, what kind of handheld tool could they hook to the brush holder or spring to see how much force it applies?

✅ Before You Answer

• Eliminate any device that measures voltage, current, or resistance—those do not measure mechanical pressure. • Eliminate any device that is normally connected to gases or liquids to read their pressure on a dial. • Select the device that can measure mechanical force/tension applied by the brush spring against the commutator.

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Question 1 of 20

D.C. propulsion motor brush pressure depends on the brush grade used. In practice with what device is the proper brush pressure established?

multimeter

manometer

spring scale

compound gauge

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Question 1 / 205eccefa3bacbc34ba4d480a0

Question 1 of 205eccefa3bacbc34ba4d480a0

D.C. propulsion motor brush pressure depends on the brush grade used. In practice with what device is the proper brush pressure established?

Back

Question 1 of 20

5eccefa3bacbc34ba4d480a0

D.C. propulsion motor brush pressure depends on the brush grade used. In practice with what device is the proper brush pressure established?

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?

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