Ielts essays abazar alizadeh


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78
IELTS Essays, 
Letters, Graphs, Diagrams & Maps
The diagram below shows how a central heating system in a house 
works.
Summarise the information by selecting and reporting the main features
and make comparisons where relevant.
This diagram provides an overview of a domestic central heating system. It 
shows how the tank, boiler and pipes ensure a constant flow of hot water to 
both the radiators and the taps.
The cold water enters the house and is stored in a water storage tank in the 
roof. From there it flows down to the boiler, located on the ground floor of the 
house.
The boiler, which is fuelled by gas or oil, heats up the water as it passes 
through it. The hot water is then pumped round the house through a system of 
pipes and flows into the radiators, located in different rooms. The water 
circulates through the radiators, which have small tubes inside them to help 
distribute the heat, and this warms each of the rooms. Some of the water is 
directed to the taps to provide hot water for the house.
Once the water has been through the pipes and radiators, it is returned to the 
boiler to be re-heated and circulated round the house again.
(172 words)


Graph, Diagram & Map Samples
 
IELTS Essays, 
Letters, Graphs, Diagrams & Maps 
79
The diagram below shows how olive oil is produced.
Summarise the information by selecting and reporting the main features, 
and make comparisons where relevant.
The diagram provides a step-by-step overview of olive oil production process. 
At first olives are collected and then they are milled in a milling machine. The 
milled olives are then pressed and the oil is extracted. The extracted oil is 
then either prepared to be refined or is cold-pressed to produce cold-pressed 
olive oil.
Having been prepared, the oil is then refined and finally the product is 
combined with virgin olive oil to produce a type of olive oil with less than 1.5% 
acidity. 
Still, the cold-pressed olive oil may undergo some other stages. The process 
may result in either extra virgin olive oil with 1% or less acidity or virgin olive 
oil with more than 1% or less than 3% acidity. As described before, cold-
pressed olive oil may be combined with refined olive oil to produce a third type 
of olive oil with less than 1.5% acidity.
Finally, as shown in the diagram, there are various types of olive oil 
depending on the acidity level. 
(166 words)


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