Besides checking for grounds, for what other...

Question 1 / 270705eccefa4bacbc34ba4d483e7

Question 1 of 270705eccefa4bacbc34ba4d483e7

Besides checking for grounds, for what other purpose can a megohmmeter be used on a DC motor?

Question 1 of 27070

Besides checking for grounds, for what other purpose can a megohmmeter be used on a DC motor?

🔍 Key Concepts

• How a megohmmeter (megger) actually works (it measures very high resistance/insulation using high DC voltage) • Difference between insulation/ground faults vs. winding continuity or shorts in a DC motor • Which motor problems involve very low resistance vs. very high resistance

💭 Think About

• Think about which of the listed faults would change the insulation resistance to ground or between windings, and which would mainly affect connection/continuity or polarity. • Which option describes a condition where a high-voltage resistance test between conductors or between conductor and frame would be meaningful? • For each choice, ask yourself: would I normally use an ohmmeter/continuity tester or a megohmmeter to find this fault?

✅ Before You Answer

• Identify which listed faults are primarily insulation-resistance issues (megohmmeter domain) vs. circuit continuity/polarity issues (other test instruments). • Recall that a megohmmeter is best for detecting leakage or breakdown of insulation between windings or to the motor frame, not mechanical conditions. • Before picking an answer, mentally match each choice to the most appropriate tool: megohmmeter, regular ohmmeter, or growler/other specialized test.

Question 1 of 27070

Besides checking for grounds, for what other purpose can a megohmmeter be used on a DC motor?

checking for an open field coil

checking for a shorted field pole

checking for undercut mica

checking for reversed interpole polarity

Question 1 / 270705eccefa4bacbc34ba4d483e7

Question 1 of 270705eccefa4bacbc34ba4d483e7

Besides checking for grounds, for what other purpose can a megohmmeter be used on a DC motor?

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Question 1 of 27070

Besides checking for grounds, for what other purpose can a megohmmeter be used on a DC motor?