Economics Of Power Generation(Electrical Engineering ) Questions and Answers

Question 1. Depreciation charges are high in case of
  1.    thermal plant
  2.    diesel plant
  3.    hydroelectric plant
  4.    none of the above
Explanation:-
Answer: Option A. -> thermal plant
Question 2. _______ is invariably used as base load plant.
  1.    Diesel engine plant
  2.    Nuclear power plant
  3.    Gas turbine plant
  4.    Pumped storage plant
Explanation:-
Answer: Option B. -> Nuclear power plant
Question 3. An alternator coupled to a _____ runs at slow speed, as compared to as compared to others.
  1.    diesel engine
  2.    hydraulic turbine
  3.    steam turbine
  4.    gas turbine
Explanation:-
Answer: Option B. -> hydraulic turbine
Question 4. Which of the following is not a source of power ?
  1.    Thermocouple
  2.    Photovoltaic cell
  3.    Solar cell
  4.    Photoelectric cell
Explanation:-
Answer: Option A. -> Thermocouple
Question 5. For a consumer the most economical power factor is generally
  1.    0.5 lagging
  2.    0.5 leading
  3.    0.95 lagging
  4.    0.95 leading
Explanation:-
Answer: Option C. -> 0.95 lagging
Question 6. Power plant cannot have single unit of 100 MW.
  1.    Hydroelectric
  2.    Nuclear
  3.    Steam
  4.    Diesel
  5.    Any of the above
Explanation:-
Answer: Option D. -> Diesel
Question 7. Which of the following devices may be used to provide protection against lightening over voltages ?
  1.    Horn gaps
  2.    Rod gaps
  3.    Surge absorbers
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
Question 8. In India production and distribution of electrical energy is confined to
  1.    private sector
  2.    public sector
  3.    government sectors
  4.    joint sector
  5.    none of the above
Explanation:-
Answer: Option B. -> public sector
Question 9. An over excited synchronous motor on noload is known as
  1.    synchronous condenser
  2.    generator
  3.    induction motor
  4.    alternator
Explanation:-
Answer: Option A. -> synchronous condenser
Question 10. Which of the following is the disadvantage due to low power factor ?
  1.    Poor voltage regulation
  2.    Increased transmission losses
  3.    High cost of equipment for a given load
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
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