Electrical Machines No load test of 3-phase induction motor gives which of the following? both A and B None of these constant loss variable loss both A and B None of these constant loss variable loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Eg (generated emf) and Eb (back emf) both are changes. different. same. none of above. changes. different. same. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A load of 900 lbs is to be raised with a lift car weighting 855 lbs at a speed of 110 feet per minute, the over balance being 40 % and percentage efficiency 45 %. Find the horse power of the motor without counterweight 150. 170. 180. 160. 150. 170. 180. 160. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor None of these. Remains same. Decrease. Increase. None of these. Remains same. Decrease. Increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The air gap between the yoke and armature is dc machine is kept very small to avoid over heating. All of these to avoid locking of the armature. to achieve a stronger magnetic field. to avoid over heating. All of these to avoid locking of the armature. to achieve a stronger magnetic field. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Generators work on the principle of production of statically induced emf. dynamically and statically induced emf. None of these dynamically induced emf. statically induced emf. dynamically and statically induced emf. None of these dynamically induced emf. ANSWER DOWNLOAD EXAMIANS APP
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