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MCQs

Total Questions : 222 | Page 18 of 23 pages
Question 171. Impedance relay is used on _____ transmission lines.
  1.    Medium
  2.    Long
  3.    Short
  4.    All
 Discuss Question
Answer: Option A. -> Medium
Question 172. By using bundled conductors which of the following is reduced?
  1.    None of the listed here
  2.    Capacitance of the circuit
  3.    Power loss due to corona
  4.    Inductance of the circuit
 Discuss Question
Answer: Option C. -> Power loss due to corona
Question 173. To increase the capacity of a transmission line for transmitting power which of the following must be decreased?
  1.    Line inductance
  2.    All of the listed here
  3.    Voltage
  4.    Capacitance
 Discuss Question
Answer: Option A. -> Line inductance
Question 174. Skin effect is noticeable only at _____ frequencies.
  1.    High
  2.    All
  3.    Low
  4.    Audio
 Discuss Question
Answer: Option A. -> High
Question 175. Power system stability is least affected by
  1.    Losses
  2.    Input torque
  3.    Reactance of transmission line
  4.    Reactance of generator
 Discuss Question
Answer: Option A. -> Losses
Question 176. The effect of wind pressure is more predominant on
  1.    Transmission lines
  2.    Insulators
  3.    Neutral wires
  4.    Supporting towers
 Discuss Question
Answer: Option D. -> Supporting towers
Question 177. If the height of transmission tower is increased, which of the following parameters is likely to change?
  1.    All of the listed here
  2.    Resistance
  3.    Inductance
  4.    Capacitance
 Discuss Question
Answer: Option D. -> Capacitance
Question 178. When the load at the receiving end of a long transmission line is removed, the sending end voltage. This effect is known as
  1.    Ferranti effect
  2.    Kelvin effect
  3.    Proximity effect
  4.    Skin effect
 Discuss Question
Answer: Option A. -> Ferranti effect
Question 179. Basically the boosters are
  1.    Transformers
  2.    Capacitors
  3.    Synchronous motors
  4.    Inductors
 Discuss Question
Answer: Option A. -> Transformers
Question 180. Which of the following is a static exciter?
  1.    Dc separately excited generator
  2.    Rectifier
  3.    Amplidyne
  4.    Rotrol
 Discuss Question
Answer: Option B. -> Rectifier

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