How is a short in the shunt field of a DC...

Question 1 / 270705eccefa4bacbc34ba4d4853c

Question 1 of 270705eccefa4bacbc34ba4d4853c

How is a short in the shunt field of a DC motor best located?

Question 1 of 27070

How is a short in the shunt field of a DC motor best located?

🔍 Key Concepts

• DC shunt field circuits and how current normally flows through field coils • Effect of a shorted turn or coil on voltage drop and impedance • Difference between tests intended for armatures (like a growler) vs tests aimed at field windings

💭 Think About

• Which method lets you compare each shunt field coil under identical conditions without disconnecting everything? • Which option is mainly used to check armatures rather than field windings? • Which technique would most clearly show that one coil has less impedance (because it is partially shorted) than the others?

✅ Before You Answer

• Identify which choice specifically measures and compares conditions across each field coil in the shunt circuit. • Eliminate any method that is primarily for armature testing instead of field windings. • Consider which test would make a shorted field coil stand out by showing an abnormally low voltage or impedance compared with the others.

Question 1 of 27070

How is a short in the shunt field of a DC motor best located?

visual inspection of the commutator

applying AC voltage to the shunt field circuit and measuring the voltage drop across each field coil

using a growler and hacksaw blade

isolating each coil from the others and using a megohmmeter

Question 1 / 270705eccefa4bacbc34ba4d4853c

Question 1 of 270705eccefa4bacbc34ba4d4853c

How is a short in the shunt field of a DC motor best located?

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Question 1 of 27070

How is a short in the shunt field of a DC motor best located?