DC Generators Quiz
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Questions and Answers

What is a key characteristic of separately excited DC generators?

  • Field winding powered by an external source (correct)
  • No control over output voltage
  • Output voltage is load-dependent
  • Field winding powered by the armature

    • Which type of DC generator provides relatively stable output voltage under varying load conditions?

  • Shunt wound DC generators (correct)
  • Series wound DC generators
  • Separately excited DC generators
  • Long shunt compound DC generators

    • What is the primary application of series wound DC generators?

  • Laboratory use
  • Stable voltage power supply
  • Battery charging
  • High starting torque applications (correct)

    • Which DC generator type combines series and shunt windings?

    <p>Compound wound DC generator</p> Signup and view all the answers

    What aspect of performance can be tailored in compound wound DC generators?

    <p>Voltage regulation</p> Signup and view all the answers

    In what scenario are separately excited generators most beneficial?

    <p>For applications needing stable and controllable output</p> Signup and view all the answers

    Which of the following applications is NOT typically associated with shunt wound DC generators?

    <p>Resistance welding</p> Signup and view all the answers

    What is a disadvantage of series wound DC generators?

    <p>Voltage varies widely with load current</p> Signup and view all the answers

    Which type of DC generator is typically used in testing and laboratory applications?

    <p>Separately excited DC generator</p> Signup and view all the answers

    Which of the following statements about compound wound generators is true?

    <p>They can provide better voltage regulation than series wound generators.</p> Signup and view all the answers

    Which type of DC generator is most suitable for applications requiring high starting torque?

    <p>Series Wound Generator</p> Signup and view all the answers

    What is a key principle that must be followed when paralleling DC generators?

    <p>The terminal voltage must match</p> Signup and view all the answers

    Which advantage does parallel operation of DC generators provide?

    <p>Increased reliability through load sharing</p> Signup and view all the answers

    In the context of load sharing in shunt generators, what is primarily adjusted to achieve a desired load distribution?

    <p>Field rheostat</p> Signup and view all the answers

    What happens if the terminal voltages of paralleled DC generators are not exactly matched?

    <p>Circulating currents may occur</p> Signup and view all the answers

    Which type of connection ensures that load is shared equally among DC generators?

    <p>Equalizing Connection</p> Signup and view all the answers

    What is a challenge associated with maintaining voltage regulation in multiple DC generators?

    <p>Hunting and small oscillations in load sharing</p> Signup and view all the answers

    Which test ensures the insulation of windings in a DC generator is adequate?

    <p>Insulation Resistance Test</p> Signup and view all the answers

    What is required for generators to ensure proper load sharing when connected in parallel?

    <p>Same voltage rating and similar voltage characteristics</p> Signup and view all the answers

    What adjustment is necessary for a DC generator before it can be connected in parallel with another?

    <p>Terminal voltage adjustment</p> Signup and view all the answers

    What is the primary purpose of the Load Test conducted on DC generators?

    <p>To determine the generator's efficiency and voltage regulation under load</p> Signup and view all the answers

    Which test specifically determines the temperature rise of windings in a generator?

    <p>Temperature Rise Test</p> Signup and view all the answers

    What do the Special Tests for DC generators evaluate?

    <p>Both the dynamic performance and transient stability under varying conditions</p> Signup and view all the answers

    Which test ensures the DC generator can withstand high voltage without insulation failure?

    <p>Dielectric Test</p> Signup and view all the answers

    Which of the following tests would determine a generator's efficiency at various operational loads?

    <p>Efficiency Test</p> Signup and view all the answers

    What is a key requirement for testing procedures of DC generators in India?

    <p>Compliance with IS 4722: Part 1 (1992)</p> Signup and view all the answers

    Which test assesses the generator's performance under sudden changes in load or voltage?

    <p>Transient Stability Test</p> Signup and view all the answers

    What is measured during the Short Circuit Test of a DC generator?

    <p>The short circuit current and equivalent circuit parameters</p> Signup and view all the answers

    What does the Voltage Regulation Test determine about a generator?

    <p>Its ability to maintain stable voltage output under variable load conditions</p> Signup and view all the answers

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