Electrical Machines Which of the following is/are effects of armature reaction? increase the iron loss All of these increases the design cost increase the maintenance and repair increase the iron loss All of these increases the design cost increase the maintenance and repair ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf of a DC machine has triangular space distribution and rotates at the speed of armature. triangular space distribution and is stationary in space. trapezoidal space distribution and is stationary in space. stepped distribution and rotates at the speed of armature. triangular space distribution and rotates at the speed of armature. triangular space distribution and is stationary in space. trapezoidal space distribution and is stationary in space. stepped distribution and rotates at the speed of armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The fall in speed of the DC generator due to increase in load can be corrected by cooling the armature. increasing the excitation. increasing the input to the prime mover. reducing the load voltage. cooling the armature. increasing the excitation. increasing the input to the prime mover. reducing the load voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Pole changing methods are suitable only for ___________ type induction motor. none of these. linear. wound. cage. none of these. linear. wound. cage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the frequency of a alternator, if P = number of poles and N = revolution made per second? 120N / P Hz. 120 / PN Hz. PN / 2 Hz. 120P / N Hz. 120N / P Hz. 120 / PN Hz. PN / 2 Hz. 120P / N Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Universal motors are used in cranes food processing All of these traction cranes food processing All of these traction ANSWER DOWNLOAD EXAMIANS APP
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