5. Offshore Wind

5.9.1.1. Quiz and answers

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Correct answers are in bold.


Q1    Offshore wind as an energy source for land based activities:
a)    Has been used for thousands of years
b)    Is currently being developed as an source of electrical energy
c)    Has been used over the past decade and is now a fully commercial scale business sector
d)    Has not yet been tested

 

Q2   The first offshore wind project; a wind farm of eleven 450kW wind turbines, was installed in Denmark in:
a)    1911
b)    1972
c)    1991
d)    2007


Q3    The source of offshore wind energy is:
a)    Kinetic energy in the wind caused by the uneven heating of the earth’s surface by the sun
b)    Potential energy in the wind caused by the uneven heating of the earth’s surface by the sun
c)    Water flowing in and out of tidal areas caused by the gravitational pull of the moon and the sun on the seas
d)    The hydrological cycle



Q4   Choose the ombination of words which best complete this sentence:

_____ air is less dense and lighter than _____ air, therefore air in warmer regions ____ and ______ more dense air flows in to take its place, creating winds.

a)    Warm, cold, rises, cooler
b)    Cold, warm, rises, cooler
c)    Warm, cold, sinks, cooler
d)    Cold, warm, sinks, cooler

 

Q5    Offshore wind speeds are generally higher
a)    Further away from the coastline and increase with height
b)    Close to the coastline and increase with height
c)    Further away from the coastline and decrease with height
d)    Close to the coastline and decrease with height



Q6    The only type of wind turbine which has been used to date for offshore wind energy projects are:
a)    Horizontal axis turbines
b)    Vertical axis turbines
c)    Darrieus turbines
d)    Savonius wind turbines


Q7    The following is an example of where offshore wind energy is being extracted:
a)    Yell Sound, Shetland Islands, Scotland device using a 150kW reciprocating hydroplane device
b)    Aguçadoura, Northern Portugal device using 3 x 750kW floating articulated attenuators
c)    La Rance, Estuary, France using 24 x 10MW low-head bulb type turbines
d)    Scroby Sands, England using 30 x 2MW horizontal axis turbines



Q8    The following is an impact associated with extraction of wind energy:
a)    Reduced tidal range leading to potential decrease in number of intertidal species
b)    Reduced wave action leading to potential changes in intertidal and sunlittoral habitats
c)    Reduction on tidal current energy leading to potential increase in sediment settlement downstream of the device
d)    Risk of bird collisions with moving turbine blades

llp logoThis project has been funded with support from the European Commission (EU Lifelong Learning Programme Agreement no LLP/LdV/TOI/2009/IRL – 515). This publication reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.

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