Geothermal Energy Multiple Choice Questions on “Types of Geothermal Resources – 1”.
1. What are the types of geothermal energy resources?
a) Hydrothermal, geo-pressurised brines, hot dry rocks, magma
b) Hydrothermal, geo-pressurised brines, hot dry rocks, sun
c) Biomass, geo-pressurised brines, hot dry rocks
d) Wind, magma, geopressurised brines, hydrothermal
Answer: a
Clarification: The four types of geothermal energy resources are hydrothermal, geopressurised brines, hot dry rocks and magma, Biomass, sun and wind are not types of geothermal energy resources.
2. What are the forms of geothermal energy?
a) Liquid and solid
b) Liquid and vapour
c) Solid and Bose-Einstein condensate
d) Plasma and liquid
Answer: b
Clarification: Geothermal energy either comes in liquid form or in vapour form. They are not solids. Bose-Einstein condensate and plasma are not forms of geothermal energy. They are states of matter.
3. What is/are the ingredient in hydrothermal plants?
a) Water
b) Hot water
c) Hot water and steam
d) Steam and water
Answer: c
Clarification: Generally, the ingredients for hydrothermal plants are hot water and steam. Both hot water and steam come together in a package. Steam cannot exists without the water being hot.
4. Which of the following naturally occurring heater is best responsible for the hot water in a geothermal site?
a) Solar heater
b) Induction stove
c) Sunlight
d) Magma
Answer: d
Clarification: Magma is mainly responsible for heating the surrounding water and generating steam in a geothermal site. Solar heater and induction stove are not natural heaters. Sunlight does not the water in a geothermal site.
5. Which of the following affect the usage of hydrothermal resources?
a) Temperature and depth of the source
b) Temperature and location of the site
c) Location of the site and depth of the source
d) Type of water and steam
Answer: a
Clarification: Temperature and depth of the source affect the application of hydrothermal resource. It does not depend on the location of the site. Water and steam do not have types.
6. Which temperature range is most suitable for directly using the hydrothermal resource? Note that “F” stands for Fahrenheit.
a) 100 – 150 degree F
b) 50 – 60 degree F
c) -100 – -90 degree F
d) -100 – 0 degree F
Answer: b
Clarification: The temperature range between 50 – 60 degree F is most suitable for directly using the hydrothermal resource. Such sources are also called as low temperature sources.
7. _________ directly use low temperature hydrothermal source.
a) Electricity generation
b) Waste treatment
c) Spas
d) Gas stove
Answer: c
Clarification: Spas directly use low temperature hydrothermal source. Other examples are heating buildings and warming fish ponds. Gas stoves use LPG. Waste treatment is not done using geothermal sources.
8. Which of the following temperature ranges is most suitable to generate electricity from hydrothermal resources? Note that “F” stands for Fahrenheit.
a) 100 – 150 degree F
b) 55 – 60 degree F
c) -200 – -90 degree F
d) 300 – 700 degree F
Answer: d
Clarification: Electricity generation requires higher temperatures to run turbines. The typical temperature range is between 300 to 700 degree F and can reach 1000 degree F as well.
9. Which of the following best indicates the electricity generation from dry steam?
a) Drilling well → steam → pipes → generator
b) Steam → drilling well → pipes → generator
c) Steam → pipes → drilling well → generator
d) Generator → steam → pipes → drilling well