Electrical Machines Armature reaction effect is more in which of the following methods? armature resistance control field weakening method None of these same in both methods armature resistance control field weakening method None of these same in both methods ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The fall in speed of the DC generator due to increase in load can be corrected by increasing the input to the prime mover. cooling the armature. reducing the load voltage. increasing the excitation. increasing the input to the prime mover. cooling the armature. reducing the load voltage. increasing the excitation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following methods are used to control the speed of DC motors is armature circuit resistance control All of these field current control supply voltage control armature circuit resistance control All of these field current control supply voltage control ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of these types of motor is self starting? Poly-phase synchronous machine. Single phase induction motor. None of these. Poly-phase induction motor. Poly-phase synchronous machine. Single phase induction motor. None of these. Poly-phase induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a 3 - Φ induction motor can be reversed by disconnecting any one phase. transposing all the three leads from the supply. transposing any two leads from slip rings. transposing any two leads from supply. disconnecting any one phase. transposing all the three leads from the supply. transposing any two leads from slip rings. transposing any two leads from supply. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Thin laminations are used in a machine in order to reduce Both 1 and 2 Copper losses Eddy current losses Hysteresis losses Both 1 and 2 Copper losses Eddy current losses Hysteresis losses ANSWER DOWNLOAD EXAMIANS APP
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