Electrical Machines Slip rings of an induction motors are made of carbon. stainless steel. phosphor bronze. aluminium. carbon. stainless steel. phosphor bronze. aluminium. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer oil is used as a coolant. inert medium. an insulator. both A and B. a coolant. inert medium. an insulator. both A and B. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements : Interpoles in dc machines 1. reducearmature reaction effects in the interpolar region 2. have the same dimension as main polls 3. have their windings connected in series with the armature 4. have same number of turns as the armature 5. have the polarity same as that of the main pole ahead in a motor From these, the correct statements are 1, 3 and 5 1 and 3 1, 2, 3 and 5 1, 2 and 3 1, 3 and 5 1 and 3 1, 2, 3 and 5 1, 2 and 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A simple method of increasing the voltage of a DC generator is to increase the number of turns in armature coil. increase the speed of shaft rotation. increase the source frequency. increase the number of turns in field coil. increase the number of turns in armature coil. increase the speed of shaft rotation. increase the source frequency. increase the number of turns in field coil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Eddy current loss will depends on Frequency Thickness Flux density All of these Frequency Thickness Flux density All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the air gap of IM is increased, ____________ will increase. power factor. magnetizing current. air gap flux. speed. power factor. magnetizing current. air gap flux. speed. ANSWER DOWNLOAD EXAMIANS APP
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