| 1. | The demagnetising component of armature reaction in a D.C. generator ? | |
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reduces generator e.m.f.
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increases armature speed
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reduces inter poles flux density
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results in sparking trouble
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Report Question| 2. | An exciter for a turbo generator is a ? | |
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separately excited generator
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shunt generator
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series generator
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compound generator
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| 3. | In a shunt generator the voltage build up is generally restricted by ? | |
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speed limitation
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armature heating
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insulation restrictions
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saturation of iron
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| 4. | Which generator would you prefer for feeding long D.C. transmission lines ? | |
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Series generator
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Shunt generator
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Over compound generator
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Flat compound generator
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| 5. | The open circuit voltage of a compound generator is 250 V. At full load the terminal voltage ? | |
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will be less than 250 V
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will always be 250 V
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may be greater or less than 250 V
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none of the above
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| 6. | ln a DC machine, fractional pitch winding is used ? | |
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to increase the generated voltage
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to reduce sparking
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to save the copper because of shorter end connections
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due to (b) and (c) above
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| 7. | Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles ? | |
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Series generator
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Shunt generator
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Compound generator
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None of the above
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| 8. | ln case of D.C. generators, the armature voltage control is considered as suitable if the machine is driven ? | |
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at constant load
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at constant current
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at constant torque
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at constant VA
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| 9. | ln D.C. generators on no-load, the air gap flux distribution in space is ? | |
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sinusoidal
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triangular
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pulsating
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flat topped
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| 10. | Which of the following components of a D.C. generator plays vital role for providing direct current of a DC generator ? | |
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Dummy coils
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Commutator
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Eye bolt
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Equilizer rings
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