Geothermal Energy Questions and Answers

Q: Which geothermal province/site occurs in Ladakh ?

The geothermal field in Ladakh is Puga.The Puga valley in Ladakh is India's most promising geothermal field, with hot springs, borax and sulphur deposits, and has been chosen for a pilot geothermal power project.Manikaran is in Himachal Pradesh, Surajkund hot spring in Jharkhand, and Tattapani in Chhattisgarh.

Which geothermal province/site occurs in Ladakh ?

A.Manikaran
B.Puga
C.Surajkund
D.Tattapani

Exam Year(s)

MH SET - 2024, SET Exam - 2024,

Answer: B

The geothermal field in Ladakh is Puga.

The Puga valley in Ladakh is India's most promising geothermal field, with hot springs, borax and sulphur deposits, and has been chosen for a pilot geothermal power project.

Manikaran is in Himachal Pradesh, Surajkund hot spring in Jharkhand, and Tattapani in Chhattisgarh.

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When the temperature range in geothermal resource is generally low, electrical power generation from such resources require the use of secondary low boiling point fluid. This is generally known as

A.Rankine cycle
B.Production well cycle
C.Flash stem cycle
D.Hard Dry Rock cycle

Exam Year(s)

UGC NET - 2012,

Answer: A

The key gives the Rankine cycle: low temperature geothermal resources run a binary cycle, in which a secondary fluid of low boiling point is vaporised and drives the turbine in a Rankine cycle. A production well is a part of the field, and flash steam and hot dry rock are other types of geothermal systems, so they are not the name of the cycle. This explanation follows the official key.

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Which of the following energy sources is not renewable on human time scale ?

A.Solar
B.Hydrothermal
C.Geothermal
D.Biomass

Exam Year(s)

UGC NET - 2013,

Answer: C

Following the official key, geothermal energy is the source that is not renewable on a human time scale, because heat is mined from a reservoir faster than it is naturally restored.

Solar energy is renewed continuously, hydrothermal and biomass sources are regenerated within human time scales, so they are renewable in this sense.

Testing each of the remaining options against the same fact shows that every one of them fails on the point the question is asking about, which confirms the keyed answer.

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In which country dry steam deposits have been used as such for electricity generation ?

A.Italy
B.Iceland
C.Austria
D.New Zealand

Exam Year(s)

UGC NET - 2014,

Answer: A

Dry steam deposits have been used as such for electricity generation in Italy, at Larderello, where the first geothermal power was produced in the early twentieth century. The answer is (A).

Iceland and New Zealand use mainly hot water and wet steam fields, and Austria does not have such a dry steam deposit. So the dry steam field of Larderello makes Italy the answer.

In a dry steam field the steam from the wells goes directly to the turbine, which is why it is simpler than the flash steam and binary systems used with hot water.

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