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WorksheetsWind Energy
Total questions: 25
Worksheet time: 25mins
What causes wind
Sun heating the atmosphere
Rotation of earth's
Variations in the earth's surface
All of the above
What drives the Global Wind?
Inequal Heating of Poles and Equator of Earth by Solar Energy
Inequal Heating of Land and Water Bodies (like Sea) by Sun
Mountains and Valleys
Wind Turbines
Direction of wind are opposite in Northern and Southern Hemisphere of earth owing to
Inequal Heating of Poles and Equator of Earth by Solar Energy
Bending Force exerted on wind by Coriolis effect owing to earth’s rotation.
Larger unfrozen sea water in Southern Hemisphere
None of the Above
Differential heating of Land and Seas (owing to different thermal time constant) during Day and Night Hours lead to
Global Wind
Local Wind
Wind Gust
Cyclones
The wind speed at which Wind Turbine starts generating power is called
Cut-In Wind Speed
Rated Wind Speed
Cut-Out Wind Speed
None of the Above
Darrieus Type of wind Turbines are of
Horizontal Axis Type
Vertical Axis type
Floating Axis Type
In Horizontal Axis Type of Wind Turbines, which force contributes more in creating rotation of turbine blades.
Drag Force
Pull Force
Push Force
Lift Force
Airfoil Design of Wind Turbines is based on
Ohms Law
Newtons Law of Motion
Bernoulli’s Principle
Archimedes Principle
Power available to a Horizontal Axis Wind turbine is proportional to
Cube of Wind Speed
Circular Area swept by Turbine blades
Air Density
All of the above
In Horizontal Axis Wind Turbine, which Control System orients the turbine rotor as per direction of wind
Slip Control
Yaw Control
Pitch Control
Stall Control
DFIG (Doubly Fed Induction Generator) based Wind Turbines can generate Electrical Power, when speed of turbine is
Less than Synchronous Speed of Generator
Equal to Synchronous Speed of Generator
Greater than Synchronous Speed of Generator
It can generate in all conditions (Below / Equal to / Above Synchronous Speed)
For same power rating, cost of Power Electronic converter will be more in which type of Wind Turbine
Synchronous Generator based Turbine
DFIG (Doubly Fed Induction Generator) Turbine
Flexi Slip System used in Turbine using Slip Ring Induction Generator
Modern Wind Turbine Blades are made of which Material?
Aluminium
Fibre-glass Reinforced Polyester (FRP)
Carbon
Silicon
Wind Turbines based on which type of Electrical generator will not require a Gear box
Synchronous Generator
Squirrel Cage Induction Generator
Slip Ring Induction Generator
Which part of Wind Turbine absorbs Mechanical shocks produced by Gusty Winds
Turbine Main Bearing
Gear Box
Fluid Coupling
Wind Turbine based on which type of Electrical Generator will work only when Grid Supply is available
DC Generator
Synchronous Generator
Induction Generator
Which method is used for Controlling the Power Generated by Wind Turbine?
Yaw Control
Stall Control
Pitch Control
Variable Speed Control
All of the Above
During which months of the year the Wind Turbines installed in India generate Maximum Energy.
January to April
May to August
September to December
It is more or less constant throughout the year
Winds speed in which range are suitable to operate Wind Turbines.
5 – 25m/s
10 – 35m/s
20 – 45m/s
30 – 55m/s
The Blades in Large Wind turbine are connected to .......
Nacelle
Rotor Hub
Generator
Gear Box
The Wind Speed is measured using an instrument called
Hydrometer
Manometer
Anemometer
Wind vane
Which country meets more than 40% of its electricity demand from wind energy?
Denmark
Portugal
Ireland
Spain
PLF (Plant Load Factor) for a Wind Turbine in India, is normally in the range of
20-30%
30-40%
40-50%
50-60%
Which Indian State has maximum Installation of Wind Turbines (In terms of Total MW)
Gujarat
Maharashtra
Rajasthan
Tamilnadu
Installed Capacity of Wind-power in India is close to
20 GW
30 GW
40 GW
50 GW
