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MCQs

Total Questions : 192 | Page 12 of 20 pages
Question 111. What is a fixed speed WECS?
  1.    WECS operating at differential speeds
  2.    WECS operating at non-differential speeds
  3.    WECS operating at variable speeds
  4.    WECS operating at constant speed
 Discuss Question
Answer: Option D. -> WECS operating at constant speed
Answer: (d).WECS operating at constant speed
Question 112. How is the speed varied in limited variable speed WECS?
  1.    Variable rotor resistance
  2.    Fixed rotor resistance
  3.    Fixed capacitance
  4.    Variable rotor
 Discuss Question
Answer: Option A. -> Variable rotor resistance
Answer: (a).Variable rotor resistance
Question 113. Fixed speed WECS are equipped ________ generators.
  1.    squirrel-cage induction
  2.    squirrel induction
  3.    induction squirrel
  4.    doubly-fed induction
 Discuss Question
Answer: Option A. -> squirrel-cage induction
Answer: (a).squirrel-cage induction
Question 114. Which of the following components are used as converters in power electronics converter?
  1.    BJT
  2.    Earphone
  3.    IGBT
  4.    Wi-Fi driver
 Discuss Question
Answer: Option C. -> IGBT
Answer: (c).IGBT
Question 115. Which generator is used in variable speed WECS?
  1.    Squirrel-cage induction
  2.    Doubly-fed induction
  3.    Induction squirrel
  4.    Induction generator
 Discuss Question
Answer: Option B. -> Doubly-fed induction
Answer: (b).Doubly-fed induction
Question 116. What is feather of wind turbine blades?
  1.    Adding feathers to the blades
  2.    Reducing the weight of wind turbine blades
  3.    Reducing the angle of pitch
  4.    Increasing the angle of pitch
 Discuss Question
Answer: Option D. -> Increasing the angle of pitch
Answer: (d).Increasing the angle of pitch
Question 117. Which of the following is a reason for variable wind speed?
  1.    Water
  2.    Earth’s rotation
  3.    Electrons
  4.    Fans
 Discuss Question
Answer: Option B. -> Earth’s rotation
Answer: (b).Earth’s rotation
Question 118. Why is feathering of wind turbine blades required?
  1.    To increase drag
  2.    To reduce drag
  3.    To prevent the blades from being destroyed by strong winds
  4.    To extract power from strong winds originating from storms
 Discuss Question
Answer: Option C. -> To prevent the blades from being destroyed by strong winds
Answer: (c).To prevent the blades from being destroyed by strong winds
Question 119. What is grid integration of wind energy?
  1.    Planning the connection of wind power plant to the grid
  2.    Physical connection of wind power plant to the grid
  3.    Energy sent from grid to run the wind turbines
  4.    Collection of all activities related to connecting wind power plants to the grid
 Discuss Question
Answer: Option D. -> Collection of all activities related to connecting wind power plants to the grid
Answer: (d).Collection of all activities related to connecting wind power plants to the grid
Question 120. Why is the energy output of wind power plant variable?
  1.    Wind speed is variable
  2.    Wind speed is an unknown constant
  3.    Wind speed is known constant
  4.    Poor equipment is used
 Discuss Question
Answer: Option A. -> Wind speed is variable
Answer: (a).Wind speed is variable

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