DC Generators Carbon brushes are used in a dc machine because _______ Carbon is cheap Carbon lubricates and polishes the commutator None of the listed here Contact resistance is decreased Carbon is cheap Carbon lubricates and polishes the commutator None of the listed here Contact resistance is decreased ANSWER DOWNLOAD EXAMIANS APP
DC Generators In case of D.C. machine winding, number of commutator segments is equal to Number of armature coil sides Number of armature conductors Number of armature coils Number of armature turns Number of armature coil sides Number of armature conductors Number of armature coils Number of armature turns ANSWER DOWNLOAD EXAMIANS APP
DC Generators A 4-pole , lap wound dc shunt generator has an armature winding consisting of 220 turns each of 0.004 Ω. The armature resistance is 0.025 Ω 0.055 Ω 1 Ω 0.5 Ω 0.025 Ω 0.055 Ω 1 Ω 0.5 Ω ANSWER DOWNLOAD EXAMIANS APP
DC Generators An 8 pole, 250 V, wave wound generator has 400 conductors. If the generator is to be lap wound, the number of conductors required is ______ 3200 800 1600 100 3200 800 1600 100 ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a simplex wave winding, the number of parallel paths is equal to _____ Number of pairs of poles None of the listed here Numbers of poles in the machine 2 Number of pairs of poles None of the listed here Numbers of poles in the machine 2 ANSWER DOWNLOAD EXAMIANS APP
DC Generators The effect of armature reaction is to Decrease the total flux Increase the total flux Make the air gap flux uniform None of the listed here Decrease the total flux Increase the total flux Make the air gap flux uniform None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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