a) Elimination of harmonic effects b) A low resistance path for the currents due to unbalancing of voltage c) Oscillations when two alternators operate in parallel d) All of these Ans: (d)
a) Salient pole rotors b) Cylindrical rotors c) Both salient pole and cylindrical rotors d) None of these Ans: (b)
a) Asynchronous generator b) Asynchronous motor c) Synchronous generator d) Synchronous motor Ans: (c)
a) Large length to diameter ratio b) Small length to diameter ratio c) Vertical configuration d) None of these Ans: (a)
a) Unity b) 0.7 c) Zero lagging d) Zero leading Ans: (d)
a) Axial ducts only b) Radial dusts only c) Forced air cooling d) Both radial and axial ducts Ans: (d)
a) Prime mover b) Excitation system c) Distribution transformer d) Protection system Ans: (c)
a) Amount of copper in the winding b) Size of the machine c) Harmonics in the generated emf d) Cost of the machine Ans: (c)
a) True sinusoidal b) Non sinusoidal c) Harmonic free d) None of these Ans: (b)
a) Full pitch to the phase emf b) Full pitched coil to the of a chorded coil c) Chorded coil to the of a full pitched coil d) Chorded coil to the phase emf Ans: (c)