Electrical Machines Short circuiting is caused in the armature winding due to grounding of two or more turns of the same coil. failure of insulation between two commutator bars. failure of insulation between two turns of coil. any of above. grounding of two or more turns of the same coil. failure of insulation between two commutator bars. failure of insulation between two turns of coil. any of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-phase transformer has its maximum efficiency at 60 percent of full load. At full load copper loss will be zero. equal to core loss. more than core loss. less than core loss. zero. equal to core loss. more than core loss. less than core loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of the dc motor is generally of the range 100 ohm. 0.1 ohm. 50 ohm. 0.5 ohm. 100 ohm. 0.1 ohm. 50 ohm. 0.5 ohm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 6 pole lap connected DC generator with 480 conductors has armature resistance of 0.06 Ω. If the conductors are reconnected to from a wave winding other things remaining unchanged, the value of armature resistance will be 0.06 Ω. 0.54 Ω. 0.54 Ω. 0.01 Ω. 0.06 Ω. 0.54 Ω. 0.54 Ω. 0.01 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Swinburne's test is applicable to DC Shunt motor. DC shunt and level Compound motor. DC series motor. DC compound motor. DC Shunt motor. DC shunt and level Compound motor. DC series motor. DC compound motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of a dc motor the ratio Eb / E is indicative of efficiency. ratio of starting to running torque. ratio of input to output voltage. ratio of starting to running current. efficiency. ratio of starting to running torque. ratio of input to output voltage. ratio of starting to running current. ANSWER DOWNLOAD EXAMIANS APP
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