DC Motors In D.C. motor which of the following can sustain the maximum temperature rise? Field winding Armature winding Slip rings Commutator Field winding Armature winding Slip rings Commutator ANSWER DOWNLOAD EXAMIANS APP
DC Motors What will happen if the back emf of a dc motor vanishes suddenly? The armature may burn The motor will run noisy The motor will continue to run The motor will stop The armature may burn The motor will run noisy The motor will continue to run The motor will stop ANSWER DOWNLOAD EXAMIANS APP
DC Motors When the armature of a D.C. motor rotates, e.m.f. induced is Mutually induced e.m.f. Self-induced e.m.f. Back e.m.f. None of these Mutually induced e.m.f. Self-induced e.m.f. Back e.m.f. None of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor Of higher H.P. should be selected Of lower H.P. should be selected Is to be de-rated by a factor recommended by manufacturer and select the next higher H.P. motor Can be used for 50°C ambient temperature also Of higher H.P. should be selected Of lower H.P. should be selected Is to be de-rated by a factor recommended by manufacturer and select the next higher H.P. motor Can be used for 50°C ambient temperature also ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a _____ motor is practically constant. Shunt Cumulatively compounded Series Differentially compounded Shunt Cumulatively compounded Series Differentially compounded ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following methods gives the greatest braking torque? Rheostatic braking None of the listed here Plugging Regenerative braking Rheostatic braking None of the listed here Plugging Regenerative braking ANSWER DOWNLOAD EXAMIANS APP
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