Each of the next One (2) item consists of two statements, one labeled as the 'Statement (I) and the other as 'Statement (II)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:

Statement (I): In order to produce electric power from a geothermal reservoir, temperature above 180 0C is required.

Statement (II): To drive steam turbines, high temperature steam is used.

Solution

Geothermal energy is heat within the earth. The word geothermal comes from the Greek words geo (earth) and therme (heat). ·         Geothermal energy is a renewable energy source because heat is continuously produced inside the earth. People use geothermal heat for bathing, to heat buildings, and to generate electricity. ·         Geothermal power plants require high temperature (300°F (150° C) to 700°F (370° C)) hydrothermal resources that come from either dry steam wells or from hot water wells. Hence Statement (I) is correct. ·         To drive steam turbines high pressure, high temperature steam is used. The high pressure creates the necessary thrust while the high temperature prevents the steam from condensing into water which can be detrimental for the turbine. Hence Statement (II) is correct but not the correct explanation of Assertion as high-pressure steam drives steam turbines.