Electrical Machines The wound rotor type IM is used for____________ speed operation. minimum. maximum. constant. variable. minimum. maximum. constant. variable. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hopkinson test is conducted under which of the following condition? any of the above half load no load full load any of the above half load no load full load ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a specific open-circuit voltage of a DC generator, the short-circuit electric current will be maximum when it is cumulatively compounded. shunt connected. separately excited. differentially compounded. cumulatively compounded. shunt connected. separately excited. differentially compounded. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase transformer has specifications as 250 KVA, 11000 V/415 V, 50 Hz. What are the values of primary and secondary currents? primary = 602 A, secondary = 22.7 A primary = 22.7 A, secondary = 602.4 A primary = 11.4 A, secondary = 301 A primary = 301 A, secondary = 22.7 A primary = 602 A, secondary = 22.7 A primary = 22.7 A, secondary = 602.4 A primary = 11.4 A, secondary = 301 A primary = 301 A, secondary = 22.7 A ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If dimension of all the parts of a synchorous generator and the number of field and armature turns are double, then generated voltage will change by a factor of 4. 2. 1. 8. 4. 2. 1. 8. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC shunt machine generates 250 V on open circuit at 1000 RPM. Armature resistance is 0.5 Ω, field resistance 250 Ω. When running as a motor takes 4 A at 250 V. Calculate the efficiency when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%. 82.5% 72.5% 78.5% 67.5% 82.5% 72.5% 78.5% 67.5% ANSWER DOWNLOAD EXAMIANS APP
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