Power Systems

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Q. What is the main disadvantage of using a linear regulator compared to a switching regulator?
  • A. Higher efficiency
  • B. Lower output voltage ripple
  • C. Higher heat generation
  • D. More complex design
Q. What is the main disadvantage of using a step-down transformer?
  • A. Increased voltage
  • B. Increased current
  • C. Higher losses
  • D. Limited applications
Q. What is the main disadvantage of using coal as a power generation method?
  • A. High initial cost
  • B. Limited availability
  • C. High greenhouse gas emissions
  • D. Low energy output
Q. What is the main function of a transformer in a power distribution system?
  • A. To generate electricity
  • B. To convert AC to DC
  • C. To step down high voltage for safe distribution
  • D. To store energy
Q. What is the main function of a transformer in a transmission system?
  • A. To increase or decrease voltage levels
  • B. To store electrical energy
  • C. To convert AC to DC
  • D. To protect the system from faults
Q. What is the main function of an inverter in power electronics?
  • A. To convert DC to AC
  • B. To convert AC to DC
  • C. To regulate voltage
  • D. To filter harmonics
Q. What is the main purpose of a circuit breaker in a power system?
  • A. To increase voltage
  • B. To provide isolation
  • C. To interrupt fault currents
  • D. To regulate frequency
Q. What is the main purpose of a power transformer in a transmission system?
  • A. To increase the current
  • B. To decrease the current
  • C. To increase the voltage for long-distance transmission
  • D. To convert AC to DC
Q. What is the main purpose of a transformer in a power system?
  • A. To generate electricity
  • B. To convert AC to DC
  • C. To step up or step down voltage
  • D. To store energy
Q. What is the main purpose of a transformer in power systems?
  • A. To generate electricity
  • B. To convert AC to DC
  • C. To step up or step down voltage
  • D. To store energy
Q. What is the main purpose of a transformer protection relay?
  • A. To measure voltage
  • B. To detect faults and protect the transformer
  • C. To regulate output voltage
  • D. To monitor temperature
Q. What is the main purpose of a transformer tap changer?
  • A. To increase the voltage
  • B. To decrease the voltage
  • C. To adjust the output voltage
  • D. To protect the transformer
Q. What is the main purpose of an isolation transformer?
  • A. To increase voltage
  • B. To decrease voltage
  • C. To provide electrical isolation
  • D. To improve power factor
Q. What is the main purpose of using a transformer in power distribution?
  • A. To increase current
  • B. To decrease losses during transmission
  • C. To convert AC to DC
  • D. To store energy
Q. What is the primary advantage of using gas turbines for power generation?
  • A. High efficiency at low loads
  • B. Low emissions
  • C. Ability to start quickly
  • D. All of the above
Q. What is the primary application of a distribution transformer?
  • A. To step up voltage for transmission
  • B. To step down voltage for consumer use
  • C. To isolate circuits
  • D. To convert AC to DC
Q. What is the primary application of a step-up transformer in power systems?
  • A. To increase voltage for transmission
  • B. To decrease voltage for distribution
  • C. To isolate circuits
  • D. To convert AC to DC
Q. What is the primary cause of corona discharge in transmission lines?
  • A. High voltage
  • B. Low humidity
  • C. High temperature
  • D. Insulation failure
Q. What is the primary cause of transformer losses?
  • A. Copper losses
  • B. Iron losses
  • C. Stray losses
  • D. All of the above
Q. What is the primary cause of transformer overheating?
  • A. High ambient temperature
  • B. Overloading
  • C. Poor ventilation
  • D. All of the above
Q. What is the primary fuel used in a natural gas power plant?
  • A. Coal
  • B. Uranium
  • C. Natural gas
  • D. Biomass
Q. What is the primary function of a DC-DC converter?
  • A. To convert AC to DC
  • B. To change the voltage level of DC
  • C. To convert DC to AC
  • D. To filter DC signals
Q. What is the primary function of a generator in a power plant?
  • A. To convert mechanical energy to electrical energy
  • B. To store electrical energy
  • C. To regulate voltage
  • D. To transform AC to DC
Q. What is the primary function of a protective relay in a transmission line?
  • A. To regulate voltage
  • B. To detect faults and initiate disconnection
  • C. To measure current
  • D. To control power factor
Q. What is the primary function of a transformer in a power distribution system?
  • A. To generate electricity
  • B. To convert AC to DC
  • C. To step up or step down voltage levels
  • D. To store energy
Q. What is the primary function of a transformer in a power system?
  • A. To convert AC to DC
  • B. To step up or step down voltage levels
  • C. To store electrical energy
  • D. To measure electrical parameters
Q. What is the primary function of a transformer in a transmission system?
  • A. To increase voltage for transmission
  • B. To decrease voltage for distribution
  • C. To convert AC to DC
  • D. To store energy
Q. What is the primary function of a transformer in power distribution?
  • A. Convert AC to DC
  • B. Step up or step down voltage
  • C. Store electrical energy
  • D. Regulate frequency
Q. What is the primary function of a transformer in power generation?
  • A. To generate electricity
  • B. To convert AC to DC
  • C. To step up or step down voltage
  • D. To store energy
Q. What is the primary function of a transmission line's insulator?
  • A. To support the line
  • B. To prevent electrical leakage
  • C. To reduce line losses
  • D. To increase line capacity
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