DC Motors Motor starter are essential for Preventing fuse blowing Avoiding excessive starting current Accelerating the motor Starting the motor Preventing fuse blowing Avoiding excessive starting current Accelerating the motor Starting the motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a dc motor can be controlled by changing All of the listed here Armature circuit resistance Aplied voltage Is flux All of the listed here Armature circuit resistance Aplied voltage Is flux ANSWER DOWNLOAD EXAMIANS APP
DC Motors What will happen if the back emf of a dc motor vanishes suddenly? The motor will continue to run The armature may burn The motor will run noisy The motor will stop The motor will continue to run The armature may burn The motor will run noisy The motor will stop ANSWER DOWNLOAD EXAMIANS APP
DC Motors In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be Less than 50% Anywhere between 75% and 90% 1 Around 90% Less than 50% Anywhere between 75% and 90% 1 Around 90% 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 Can be used for 50°C ambient temperature also Is to be de-rated by a factor recommended by manufacturer and select the next higher H.P. motor Of lower H.P. should be selected Of higher H.P. should be selected Can be used for 50°C ambient temperature also Is to be de-rated by a factor recommended by manufacturer and select the next higher H.P. motor Of lower H.P. should be selected ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. machines the residual magnetism is of the order of 10 to 15 percent 20 to 25 percent 2 to 3 percent 50 to 75 percent 10 to 15 percent 20 to 25 percent 2 to 3 percent 50 to 75 percent ANSWER DOWNLOAD EXAMIANS APP
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