Renewable Energy Engineering (2181910) MCQs

MCQs of Wind Energy

Showing 51 to 60 out of 81 Questions
3 4 5 6 7 8
51.
On what does the selection of supporting structure depends?
(a) Length of blades
(b) Rotating capacity
(c) Capacity of generator
(d) Transmission systems
Answer:

Option (d)

52.
At what type of location vibrations are less in the wind turbines?
(a) Windward
(b) Leeward
(c) Downwind location
(d) Upwind Location
Answer:

Option (c)

53.
The term upwind stream means the direction of wind flow from
(a) blade to tail vane
(b) tail vane to blade
(c) tail vane to axis
(d) none of the above
Answer:

Option (a)

54.
Pitch of the blade is controlled by rotating it from its
(a) root
(b) base
(c) side
(d) all of the above
Answer:

Option (a)

55.
Why blade velocity of wind turbine varies?
(a) Due to varying wind speeds
(b) Long length of blades
(c) Due to the height of mount
(d) Because of hotness of Sun
Answer:

Option (b)

56.
In wind turbine as tip speed ratio increases then number of blades
(a) increases
(b) increases
(c) remains constant
(d) none of the above
Answer:

Option (a)

57.
A two blade wind turbine produces maximum power when the tip- speed ratio is equal to
(a) π
(b) 2π
(c) 3π
(d) 0.593
Answer:

Option (b)

58.
How much ideal efficiency should practical turbine have?
(a) 10 – 12%
(b) 18 – 25%
(c) 80 – 90%
(d) 50 – 70%
Answer:

Option (d)

59.
How many types are acting on propeller type wind mill?
(a) 2
(b) 3
(c) 4
(d) 5
Answer:

Option (a)

60.
Name the windmill which has four blades mounted on a central post.
(a) post mill
(b) smock mill
(c) tower mill
(d) fan mill
Answer:

Option (a)

Showing 51 to 60 out of 81 Questions
3 4 5 6 7 8