Electrical Machines In electric locomotives which of the following motor are used ? DC series motor. DC Shunt motor. DC compound motor. Synchronous motor. DC series motor. DC Shunt motor. DC compound motor. Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What type of dielectric material is used in capacitors used for fans and for power factor correction? Mica. Glass. Oil impregnated paper. Vacuum. Mica. Glass. Oil impregnated paper. Vacuum. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is not a necessary condition to be satisfied for synchronising an incoming alternator to an already operating alternator? same prime mover speed same frequency same phase sequence same voltage magnitude same prime mover speed same frequency same phase sequence same voltage magnitude ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In Ward-Leonard system, the lower limit of the speed imposed by None of above. Residual magnetism of the generator. Armature resistance. Field resistance. None of above. Residual magnetism of the generator. Armature resistance. Field resistance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cross magnetization effects which of the following? reduces the terminal voltage reduction in main field flux commutation both 2 and 3 reduces the terminal voltage reduction in main field flux commutation both 2 and 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor of a 3 - Φ wound induction motor is provided with heavy copper or aluminium bars placed in rotor slots. three phase winding. heavy short-circuited end rings. single phase winding. heavy copper or aluminium bars placed in rotor slots. three phase winding. heavy short-circuited end rings. single phase winding. ANSWER DOWNLOAD EXAMIANS APP
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