Question 273Electricity/Electronics - QMED70% to pass
To effectively clean a commutator in good physical condition, what should be used?
AI Explanation
The correct answer is B) a canvas wiper.
To effectively clean a commutator in good physical condition, a canvas wiper should be used. This is the recommended method as it is a soft, abrasive-free material that can gently clean the commutator surface without causing any damage. The other options are not suitable - trichloride ethylene is a harsh chemical that can damage the commutator, kerosene is also a strong solvent that could remove the commutator's protective coating, and a commutator stone is too abrasive and can leave scratches on the surface.
Related Questions
#271 How may propulsion DC motor brush pressures be calculated? #272 Brushes in a DC generator must be positioned in the neutral plane to avoid excessive sparking associated with the brushes. What device is used to prevent the shifting of the neutral plane due to armature reaction for varying generator loads? #274 What could cause a very slow, but continual loss of electrolyte level from the cells of a storage battery? #275 Concerning the illustrated fire detection and alarm system, what statement is true concerning the wiring between zones? Illustration EL-0114 #276 What is the characteristic of a wound-rotor induction motor with maximum rheostat resistance inserted in the rotor circuit during starting?