Electrical Machines The voltage regulation of a DC generator at full load being zero implies that the generator is shunt connected. series connected. deferentially compounded. cumulatively compounded. shunt connected. series connected. deferentially compounded. cumulatively compounded. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of generated emf in the armature coil of a DC machine is 1. the same as that of the current in a generator 2. the same as that of the current in a motor 3. opposite to that of the current in a generator 4. opposite to that of the current in a motor From these, the correct answer is 1, 3 2, 4 1, 4 2, 3 1, 3 2, 4 1, 4 2, 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is 1080 1000 1200 1203 1080 1000 1200 1203 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines During no load test, an induction motor draws power only for the small copper loss. for core loss and windage and friction loss. for core loss and copper loss. for copper loss and windage friction loss. only for the small copper loss. for core loss and windage and friction loss. for core loss and copper loss. for copper loss and windage friction loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalanced supply voltage given to a 3 - φ, delta connected induction motor will cause all of these. negative sequence current. less heating of the rotor. less heating of the rotor. all of these. negative sequence current. less heating of the rotor. less heating of the rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Copper brushes in DC machine are used where low voltage and high currents are involved. in both of above cases. None of these where high voltage and low current. where low voltage and high currents are involved. in both of above cases. None of these where high voltage and low current. ANSWER DOWNLOAD EXAMIANS APP
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