| 1. | For parallel operation of the two alternators, desirable feature is that both should have ? | |
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same reactance
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same resistance
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more of resistance as compared to synchronous reactance
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less of resistance as compared to synchronous reactance
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Report Question| 2. | less of resistance as compared to synchronous reactance ? | |
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transfer of load
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synchronizing
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balancing of load
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phase sequence
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| 3. | Hydrogen is used in large alternators mainly to ? | |
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reduce distortion of waveform
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cool the machine
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strengthen the magnetic field
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reduce eddy current losses
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| 4. | ln case of turbo alternators the rotor is usually made of ? | |
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cast iron
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forged steel
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laminated stainless steel
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manganese steel
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| 5. | Where the terminal voltage of an alternator falls on throwing of the load, it indicates that the load is purely ? | |
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resistive
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capacitive
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inductive
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none of the above
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| 6. | Harmonic component of generated e.m.f. will be more in ? | |
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short pitch coil
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full-pitch coil
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long-pitch coil
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none of above coils
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| 7. | Which of the following is not integral part of synchronous generator system ? | |
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Excitation system
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Protection system
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Prime mover
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Distribution system
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| 8. | In a star connected armature wincing ? | |
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phase voltage contains 3rd harmonic e.m.f. but live voltage does not contain it
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phase voltage contains 3rd harmonic e.m.f. ns live voltage also contains third harmonic component
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phase voltage does not contain third harmonic e.m.f. as line voltage also does not contain it
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none of the above
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| 9. | ln which coil the harmonic component of the generated e.m.f. will be more ? | |
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Full pitch coil
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Short pitch coil
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Long pitch coil
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Same in all coils
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| 10. | When two alternators are running in exact synchronism, the synchronising power will be ? | |
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unity
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zero
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sum of the output of two
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none of the above
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