The diagram below shows how electricity is generated in a hydroelectric power station.

Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram illustrates the process of electricity production using flow of water in a hydroelectric power station.

Overall, the process consists of four main stages, namely flowing water from a high-level reservoir down to a low-level one, rotating turbines by water flow which generates electricity through a generator, sending the current to the end users and finally pumping water into high-level reservoir.

The process starts when water in the high-level reservoir passes through an intake under the dam which is open during days and closed during nights. Following this, water flows down into the power station which is comprised of reversible turbines and a generator. In the next stage, water flow rotates the reversible turbines which produce electricity into a generator. Having been received by the generator, the electricity is transmitted through power lines to be sent to national grid for consumption. Ultimately, water is pumped from low-level reservoir into high-level reservoir by the same reversible turbines during night and the process starts all over again the next day.

Sample of band 8 written by Fariba ZakiZ

#writing #task1 #Ielts #Ieltsmodarres #modarres #cambridge #academic #diagram #process #electricity