Electrical Machines Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator? 210 V. 201.02 V. 212 V. 205 V. 210 V. 201.02 V. 212 V. 205 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following load normally needs starting torque more than rated torque? Centrifugal pumps. Blowers. Air compressors. Conveyers. Centrifugal pumps. Blowers. Air compressors. Conveyers. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If dimension of all the parts of a synchorous generator and the number of field and armature turns are double, then generated voltage will change by a factor of 8. 2. 4. 1. 8. 2. 4. 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC Motor for constant load torque, what will happen to the armature current if armature resistance increases? Increases. None of above. Decreases. Remain unchanged Increases. None of above. Decreases. Remain unchanged ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increase in speed of a DC motor back emf falls and line current increases. both back emf as well as line current fall. both back emf as well as line current increase. back emf increases but line current falls. back emf falls and line current increases. both back emf as well as line current fall. both back emf as well as line current increase. back emf increases but line current falls. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Oil is provided in an oil filled transformer for cooling. lubrication. insulating. both cooling and insulation. cooling. lubrication. insulating. both cooling and insulation. ANSWER DOWNLOAD EXAMIANS APP
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