1. Unlike D.C. generator kW rating, alternators are rated in ? MW kVAR kWh kVA Answer: kVA Explanation: View Answer Discuss in Forum Report Question

 2. When the speed of an alternator increases ? the frequency decrease the frequency increases the frequency remains same the frequency changes Answer: the frequency increases Explanation: View Answer Discuss in Forum Report Question

 3. When two alternators are running in parallel, their kVAR load share are changed by changing their ? driving torque, driving torque respectively driving torque, excitation respectively excitation, driving torque respectively excitation and excitation Answer: excitation, driving torque respectively Explanation: View Answer Discuss in Forum Report Question

 4. In an alternator, the frequency of voltage generated depends on ? rotative speed only number of poles only both (a) and (b) none of the above Answer: both (a) and (b) Explanation: View Answer Discuss in Forum Report Question

 5. Two alternators are running in parallel. if the field of one of the alternators is adjusted it will ? change its power factor change its frequency reduce its speed change its load Answer: change its power factor Explanation: View Answer Discuss in Forum Report Question

 6. If the driving force of both the alternators running in parallel is changed. this will result in change in ? generated voltage frequency back e.m.f. all of the above Answer: frequency Explanation: View Answer Discuss in Forum Report Question

 7. In an alternator one of the advantages of distributing the winding is to ? improve voltage waveform reduce noise save on copper reduce harmonics Answer: improve voltage waveform Explanation: View Answer Discuss in Forum Report Question

 8. Salient pole rotors are used where ? high frequency current is required floor space is available in plenty low and medium speed prime movers are available high speed prime movers are available Answer: low and medium speed prime movers are available Explanation: View Answer Discuss in Forum Report Question

 9. In an alternator if the armature reaction produces demagnetisation of the main field, the power factor should be ? unity zero, lagging load zero, leading load none of the above Answer: zero, lagging load Explanation: View Answer Discuss in Forum Report Question

 10. Generated e.m.f. for same field current and double speed will be ? same double less than double more than double Answer: double Explanation: View Answer Discuss in Forum Report Question