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MCQs

Total Questions : 222 | Page 4 of 23 pages
Question 31. ________ are the conductors, which connect the consumer's terminals to the distribution.
  1.    Distributors
  2.    Service mains
  3.    Feeders
  4.    None of the above
 Discuss Question
Answer: Option B. -> Service mains
Question 32. The square root of the ratio of line impedance and shunt admittance is called the
  1.    Surge impedance of the line
  2.    Conductance of the line
  3.    Regulation of the line
  4.    None of the above
 Discuss Question
Answer: Option A. -> Surge impedance of the line
Question 33. The power transmitted will be maximum when
  1.    Corona losses are minimum
  2.    Reactance is high
  3.    Sending end voltage is more
  4.    Receiving end voltage is more
 Discuss Question
Answer: Option C. -> Sending end voltage is more
Question 34. The wooden poles well impregnated with creosote oil or any preservative compound has life
  1.    From 2 to 5 years
  2.    10 to 15 years
  3.    25 to 30 years
  4.    60 to 70 years
 Discuss Question
Answer: Option C. -> 25 to 30 years
Question 35. The loads on distributors systems are generally
  1.    Balanced
  2.    Unbalanced
  3.    Either of the above
  4.    None of the above
 Discuss Question
Answer: Option B. -> Unbalanced
Question 36. By which of the following a bus-bar is rated?
  1.    Current only
  2.    Current and voltage
  3.    Current, voltage and frequency
  4.    Current, voltage, frequency and short time current
 Discuss Question
Answer: Option D. -> Current, voltage, frequency and short time current
Question 37. Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical?
  1.    Static condenser
  2.    Synchronous condenser
  3.    Tap changing transformer
  4.    Booster transformer
 Discuss Question
Answer: Option D. -> Booster transformer
Question 38. The frequency of voltage generated, in case of generators, can be increased by
  1.    Using reactors
  2.    Increasing the load
  3.    Adjusting the governor
  4.    Reducing the terminal voltage
 Discuss Question
Answer: Option C. -> Adjusting the governor
Question 39. In aluminium conductors, steel core is provided to
  1.    Compensate for skin effect
  2.    Neutralise proximity effect
  3.    Reduce line inductance
  4.    Increase the tensile strength
 Discuss Question
Answer: Option D. -> Increase the tensile strength
Question 40. Overhead system can be designed for operation up to
  1.    11 kV
  2.    33 kV
  3.    66 kV
  4.    400 kV
 Discuss Question
Answer: Option D. -> 400 kV

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