Electrical Machines In a 6 pole DC machine, 90 mechanical degrees correspond to which of the following electrical degree? 45. 270. 180. 30. 45. 270. 180. 30. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In 3 - Φ induction motor some times copper bars are placed deep in the rotor to improve efficiency. improve starting torque. reduce copper loss. improve power factor. improve efficiency. improve starting torque. reduce copper loss. improve power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature shaft must be able to withstand All of these bending moment due to weight of the armature. any unbalanced magnetic pull on the armature core. twisting strains due to transmission of torque. All of these bending moment due to weight of the armature. any unbalanced magnetic pull on the armature core. twisting strains due to transmission of torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature flux is.............with respect to main field flux or main field poles? rotates same direction stationary None of these rotates opposite direction rotates same direction stationary None of these rotates opposite direction ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is 44 A. 40 A. 400 A. 440 A. 44 A. 40 A. 400 A. 440 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The type of DC motor used for shears and punches is Cummulative compound motor. Series motor. Differential compound motor. Shunt motor. Cummulative compound motor. Series motor. Differential compound motor. Shunt motor. ANSWER DOWNLOAD EXAMIANS APP
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