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MCQs

Total Questions : 192 | Page 7 of 20 pages
Question 61. Does flying a kite use wind energy?
  1.    Yes
  2.    No
  3.    May be Yes or No
  4.    Can't say
 Discuss Question
Answer: Option A. -> Yes
Answer: (a).Yes
Question 62. Which of the following is a potential application of wind energy?
  1.    Converting heat to wind energy
  2.    Converting electrical energy to wind energy
  3.    Transportation of electrical energy
  4.    Converting the wind flow due to speeding cars into electricity on highways
 Discuss Question
Answer: Option D. -> Converting the wind flow due to speeding cars into electricity on highways
Answer: (d).Converting the wind flow due to speeding cars into electricity on highways
Question 63. What are the two primary aerodynamic forces acting on wind turbine rotors?
  1.    Lift, drag
  2.    Drag, gravitational force
  3.    Gravitational force, lift
  4.    Gravitational force, electrical force
 Discuss Question
Answer: Option A. -> Lift, drag
Answer: (a).Lift, drag
Question 64. Lift is an aerodynamic force acting _______
  1.    opposite to the direction of wind flow
  2.    parallel to the direction of wind flow
  3.    diagonal to the direction of wind flow
  4.    perpendicular to the direction of wind flow
 Discuss Question
Answer: Option D. -> perpendicular to the direction of wind flow
Answer: (d).perpendicular to the direction of wind flow
Question 65. Drag is an aerodynamic force acting ______
  1.    perpendicular to the direction of wind flow
  2.    parallel to the direction of wind flow
  3.    diagonal to the direction of wind flow
  4.    opposite to the direction of wind flow
 Discuss Question
Answer: Option B. -> parallel to the direction of wind flow
Answer: (b).parallel to the direction of wind flow
Question 66. Which of the following blade designs is becoming less popular?
  1.    HAWT
  2.    Airfoil design
  3.    Curve design
  4.    Flat blade design
 Discuss Question
Answer: Option D. -> Flat blade design
Answer: (d).Flat blade design
Question 67. The airfoil/curve blade designs are affected by drag along its length.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 68. How is drag force experienced by the blade reduced in various modern blade designs?
  1.    Bending and tapering the blade
  2.    Using heavy metals
  3.    Twirling the blade
  4.    Increasing the length of the blade
 Discuss Question
Answer: Option A. -> Bending and tapering the blade
Answer: (a).Bending and tapering the blade
Question 69. What is angle of attack?
  1.    Angle between downwind side and upwind side
  2.    Angle between the blade and the rotor
  3.    Angle between the direction of wind and pitch of the blade
  4.    Angle between the blade and the wind tower
 Discuss Question
Answer: Option C. -> Angle between the direction of wind and pitch of the blade
Answer: (c).Angle between the direction of wind and pitch of the blade
Question 70. When plotting lift vs angle of attack, which of following best describes the shape of the curve?
  1.    Exponential
  2.    Cubic
  3.    Linear
  4.    Parabolic
 Discuss Question
Answer: Option D. -> Parabolic
Answer: (d).Parabolic

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