430 NR EXAM WITH CORRECT
QUESTIONS AND ANSWERS 2025
Which of the following describes the brushes when they are aligned to the
commutator surface at a right angle? - CORRECT-ANSWERSRadial
Copper oxide, water vapor, graphite film and free carbon particles are
components that make up what? - CORRECT-ANSWERSCommutator film
What color is a commutator with good commutation? - CORRECT-
ANSWERSChocolate
What should be the maximum depth when undercutting mica on a medium
size commutator? - CORRECT-ANSWERSOne sixteenth inch
What does a small amount of arcing at the commutator indicate? - CORRECT-
ANSWERSA normal condition
A light electrical load on a commutator causes which of the following
conditions? - CORRECT-ANSWERSThreading
How can an eccentric commutator be corrected? - CORRECT-
ANSWERSTurning the commutator with a lathe tool
QUESTIONS AND ANSWERS 2025
Which of the following describes the brushes when they are aligned to the
commutator surface at a right angle? - CORRECT-ANSWERSRadial
Copper oxide, water vapor, graphite film and free carbon particles are
components that make up what? - CORRECT-ANSWERSCommutator film
What color is a commutator with good commutation? - CORRECT-
ANSWERSChocolate
What should be the maximum depth when undercutting mica on a medium
size commutator? - CORRECT-ANSWERSOne sixteenth inch
What does a small amount of arcing at the commutator indicate? - CORRECT-
ANSWERSA normal condition
A light electrical load on a commutator causes which of the following
conditions? - CORRECT-ANSWERSThreading
How can an eccentric commutator be corrected? - CORRECT-
ANSWERSTurning the commutator with a lathe tool