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 In a dc machines the residual magnetism is of the order of 50 to 75 percent 2 to 3 percent 10 to 15 percent 20 to 25 percent 50 to 75 percent 2 to 3 percent 10 to 15 percent 20 to 25 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc series motor is best suited for driving Machine tools Cranes and hoists Shear and punches None of the listed here Machine tools Cranes and hoists Shear and punches None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors D.C. series motors are used Where load changes frequently Where constant operating speed is needed None of these Where load is constant Where load changes frequently Where constant operating speed is needed None of these Where load is constant ANSWER DOWNLOAD EXAMIANS APP
DC Motors The value of back emf in dc motor is maximum at Half full load None of the listed here No load Full load Half full load None of the listed here No load Full load ANSWER DOWNLOAD EXAMIANS APP
DC Motors The commutating pole winding is connected in Series with the armature None of the listed here Parallel with the armature Series-parallel with the armature Series with the armature None of the listed here Parallel with the armature Series-parallel with the armature ANSWER DOWNLOAD EXAMIANS APP
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