Electrical Machines The no load and full load speed of DC motor are 1400 rpm and 1200 rpm respectively. What is the percentage speed regulation of the motor ? 16.67%. 18.25%. 15.30%. 14.28%. 16.67%. 18.25%. 15.30%. 14.28%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A flat compound generator is obtained from compound generator by connecting a variable resistor in parallel with the series field in series with the series field in parallel with the shunt field in series with the shunt field in parallel with the series field in series with the series field in parallel with the shunt field in series with the shunt field ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip rings of an induction motors are made of stainless steel. phosphor bronze. carbon. aluminium. stainless steel. phosphor bronze. carbon. aluminium. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is accidentally connected to single phase ac supply voltage. The torque produced will be pulsating and unidirectional steady and unidirectional oscillating None of these pulsating and unidirectional steady and unidirectional oscillating None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because field system lost residual magnetism field resistance was higher than critical resistance field winding was wrongly connected there was a break in the armature circuit field system lost residual magnetism field resistance was higher than critical resistance field winding was wrongly connected there was a break in the armature circuit ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, for the same value of Æ, Z and N; which one of the following statements is correct? Armature emf is more with wave winding than with lap winding. Armature emf depends on weather the machine is running as a motor or generator. Armature emf is same as long as the flux density in the air gap remains the same. Armature emf is less with wave winding than with lap winding. Armature emf is more with wave winding than with lap winding. Armature emf depends on weather the machine is running as a motor or generator. Armature emf is same as long as the flux density in the air gap remains the same. Armature emf is less with wave winding than with lap winding. ANSWER DOWNLOAD EXAMIANS APP
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