Electrical Machines Which of these types of motor is used in elevators? DC shunt motor. DC series motor. None of these. DC compound motor. DC shunt motor. DC series motor. None of these. DC compound motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the commutator pitch? Number of conductors spanned by one coil at the back end of the armature. Number of commutator segments between two successive coils. The distance between the staring of first coil and its next successive coil Number of conductors spanned by one coil at the front end of the armature. Number of conductors spanned by one coil at the back end of the armature. Number of commutator segments between two successive coils. The distance between the staring of first coil and its next successive coil Number of conductors spanned by one coil at the front end of the armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is 570 A. 460 A. 340 A. 250 A. 570 A. 460 A. 340 A. 250 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor may be unbalanced due to overload. overheating of winding. uneven air gap. poor lubrication. overload. overheating of winding. uneven air gap. poor lubrication. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer has hysteresis loss of 30 W, at 240 V, 60 Hz. The hysteresis loss at 200 V, 50 Hz will be 28 W. 25 W. 36 W. 30 W. 28 W. 25 W. 36 W. 30 W. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines It is an advisable to use auto transformer if the transformation ratio is near to 1. 0.25. Greater than 1. 0.5. near to 1. 0.25. Greater than 1. 0.5. ANSWER DOWNLOAD EXAMIANS APP
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