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 = 301 A, secondary = 22.7 A primary = 11.4 A, secondary = 301 A primary = 22.7 A, secondary = 602.4 A primary = 602 A, secondary = 22.7 A primary = 301 A, secondary = 22.7 A primary = 11.4 A, secondary = 301 A primary = 22.7 A, secondary = 602.4 A ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the advantages of carbon brush over the copper brush? All of these They are not hard as copper brush They are self lubricating in nature In case of any sparking they will be less damaged than copper brushes All of these They are not hard as copper brush They are self lubricating in nature In case of any sparking they will be less damaged than copper brushes ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a motor falls from 1100 r.p.m at no-load to 1050 r.p.m at rated load. The speed regulation of motor is 2.56 %. 4.76%. 3.76%. 2.57 %. 2.56 %. 4.76%. 3.76%. 2.57 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In travelling cranes for hoisting and lowering which type of motor is preferred? Single phase induction motor. AC slip ring motor. DC series motor. Synchronous motor. Single phase induction motor. AC slip ring motor. DC series motor. Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is used in grinders? Split phase IM. Synchronous motor. Capacitor start IM. Capacitor start capacitor run IM. Split phase IM. Synchronous motor. Capacitor start IM. Capacitor start capacitor run IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power developed in a cylindrical synchronous machine depends on both 1and 2 synchronous reactance load angle excitation both 1and 2 synchronous reactance load angle excitation ANSWER DOWNLOAD EXAMIANS APP
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