IELTS Task 1 : Hydro Electric process

The diagram depicts the process of water use for producing electrical power.

Overall, the process involves various stages beginning from sea water through sophisticated procedures prior to create sufficient electrical energy.

The process is begun when seawater evaporate to form a small cloud as the effect of sun heat. Once the cloud produces rainfalls, such downpour is collected in a reservoir linking with a dam and pumping pipes. To following step, the valve is opened caused the amount of water flows to the turbine below the reservoir and it rotates to produce the electrical current. Pass through the turbine, the water comes onto the shelter and ready to pump back to the reservoir, a circular process occurred.

The electricity made by turbine is transferred to the transformer station over high voltage cables. Moreover, the station is responsible to deliver the demand of domestic and industrial costumer for the electricity through installed cables under the ground.

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  diagram_electricity.png
  

The process begins when the seawater evaporate to form clouds under the affect of solar heat.

suchthe downpour

linkinglinked with

omit to | Following steps


the shut-on valve




for delivering

how we know the differences between to as stand as preposition and to as infinitive?

because I ever see the using of prior with to, so I do the same
Here the dictionary said
prior to sth
before a particular time or even
example : the weeks prior to her death



as I observed, the diagram shows evaporation is only comes from sea water and the reservoir function is to collect rain water :((

... it is not accurate in this occasion. you may say the process begins when the sunlight hot up the the seawater. :-)..


... cloud does not produces rainfalls at all but once cloud cannot accomodate the volume of water which is accumulated in it, raining happens