Types of Geothermal Systems: Classification and Characteristics

Question 1

How are enhanced geothermal systems created?

Accepted Answer

Water is trapped in hot, fractured rocks with low permeability.

Answer

Magma is injected into underground formations.

Answer

Groundwater is heated by radioactive decay.

Answer

Steam is extracted from the surface.

Question 2

Which fluid is typically NOT found in geothermal systems?

Accepted Answer

Oil

Answer

Water

Answer

Steam

Answer

Carbon dioxide

Question 3

Which factor primarily determines the temperature of a geothermal system?

Accepted Answer

Depth of the reservoir

Answer

Volume of water in the reservoir

Answer

Age of the system

Answer

Distance from tectonic plates

Question 4

What is a primary application of low-temperature geothermal systems?

Accepted Answer

Space heating and cooling

Answer

Electricity generation

Answer

Chemical processing

Answer

Hydrogen production

Question 5

Which factor is NOT typically considered when assessing the economic viability of a geothermal project?

Accepted Answer

Proximity to major cities

Answer

Resource temperature

Answer

Drilling costs

Answer

Government incentives

Question 6

The primary criteria used to classify geothermal systems is:

Accepted Answer

Temperature

Answer

Pressure

Answer

Fluid type

Answer

Depth

Question 7

Geothermal systems with temperatures exceeding 150°C are categorized as:

Accepted Answer

High-temperature systems

Answer

Medium-temperature systems

Answer

Low-temperature systems

Answer

Very low-temperature systems

Question 8

Which type of geothermal system is characterized by a mixture of water and steam in the fluid?

Accepted Answer

Wet steam system

Answer

Dry steam system

Answer

Hot water system

Answer

Geopressured system

Question 9

Which of the following is NOT a characteristic of very low-temperature geothermal systems?

Accepted Answer

High pressure

Answer

Temperatures below 90°C

Answer

Widely used for heating and cooling

Answer

Found at shallow depths

Question 10

Which type of geothermal system is influenced by the movement of fluids along faults and fractures?

Accepted Answer

Fault-controlled system

Answer

Convection-dominated system

Answer

Conduction-dominated system

Answer

Magma-dominated system

Question 11

Systems where heat is primarily transferred through conduction are known as:

Accepted Answer

Conduction-dominated systems

Answer

Convection-dominated systems

Answer

Hybrid systems

Answer

Geopressured systems

Question 12

Which type of geothermal system is commonly associated with volcanic activity?

Accepted Answer

Magma-dominated system

Answer

Hydrothermal system

Answer

Geopressured system

Answer

Convection-dominated system

Question 13

Systems with geothermal fluids containing dissolved salts and gases are called:

Accepted Answer

Saline systems

Answer

Freshwater systems

Answer

Geopressured systems

Answer

Magmatic systems

Question 14

Which of the following is a distinctive characteristic of hydrothermal geothermal systems?

Accepted Answer

Fluid-dominated conditions

Answer

High temperatures exceeding 150°C

Answer

Low pressures below 100 bars

Answer

Rock-dominated conditions

Question 15

Which type of geothermal system is commonly associated with volcanic activity?

Accepted Answer

Magmatic

Answer

Hydrothermal

Answer

Geopressured

Answer

Hot Dry Rock

Question 16

Which type of geothermal system is characterized by relatively low temperatures (typically below 90°C)?

Accepted Answer

Low-temperature

Answer

Hydrothermal

Answer

Geopressured

Answer

Hot Dry Rock

Question 17

Which type of geothermal system is frequently found within sedimentary basins?

Accepted Answer

Geopressured

Answer

Hydrothermal

Answer

Hot Dry Rock

Answer

Magmatic

Question 18

What term describes a geothermal system that has not undergone comprehensive exploration or development?

Accepted Answer

Prospect

Answer

Reservoir

Answer

Field

Answer

Resource

Question 19

Which of the following is NOT a classification of geothermal systems based on fluid characteristics?

Accepted Answer

Density

Answer

Liquid-dominated

Answer

Vapor-dominated

Answer

Hot dry rock

Question 20

For direct heating applications, which geothermal system type is most suitable, allowing heat utilization without electricity generation?

Accepted Answer

Low-temperature geothermal systems

Answer

High-temperature geothermal systems

Answer

Medium-temperature geothermal systems

Question 21

What type of geothermal system is commonly found in areas with active volcanic activity?

Accepted Answer

Magmatic

Answer

Vapor-dominated

Answer

Liquid-dominated

Answer

Dry rock

Question 22

What factor is primarily responsible for determining the temperature of a geothermal system?

Accepted Answer

Depth

Answer

Pressure

Answer

Fluid type

Answer

Rock composition

Question 23

What is the primary technical challenge in extracting geothermal energy from dry rock systems?

Accepted Answer

Low permeability

Answer

High temperature

Answer

Corrosion

Answer

Fluid contamination

Question 24

Which of the following is NOT a characteristic of a liquid-dominated geothermal system?

Accepted Answer

Low temperature

Answer

High pressure

Answer

Water as the primary fluid

Answer

Moderate depth

Question 25

What type of geothermal system offers the greatest potential for electricity generation?

Accepted Answer

Dry steam

Answer

Wet steam

Answer

Hot water

Answer

Dry rock

Question 26

Which technology is used to enhance the permeability of dry rock geothermal systems?

Accepted Answer

Hydraulic fracturing

Answer

Directional drilling

Answer

Chemical stimulation

Answer

Horizontal drilling

Question 27

Which of the following is a characteristic of a low-temperature geothermal system typically used for direct heating applications?

Accepted Answer

Temperatures below 150°C

Answer

High pressure requiring specialized equipment

Answer

Suitable for electricity generation

Answer

Found only in deep geological formations

Question 28

What is the primary source of heat in a high-enthalpy geothermal system?

Accepted Answer

Magmatic intrusion

Answer

Deep circulation of groundwater

Answer

Solar radiation

Answer

Radioactive decay

Question 29

Which type of geothermal system is most commonly found in active volcanic regions?

Accepted Answer

Vapor-dominated system

Answer

Liquid-dominated system

Answer

Hot dry rock system

Answer

Geopressured system

Question 30

What is the main difference between a liquid-dominated system and a vapor-dominated system?

Accepted Answer

The dominant fluid phase present in the reservoir

Answer

The temperature of the reservoir

Answer

The presence of non-condensable gases

Answer

The depth of the reservoir

Question 31

Which of the following is NOT a type of enhanced geothermal system (EGS) technique?

Accepted Answer

Geothermal heat pumps

Answer

Hydraulic fracturing

Answer

Directional drilling

Answer

Hydrothermal shear stimulation

Question 32

What is the purpose of a geothermal heat pump?

Accepted Answer

To extract heat from the ground for heating buildings or providing hot water

Answer

To generate electricity from geothermal fluids

Answer

To store thermal energy for future use

Answer

To dispose of geothermal wastewater

Question 33

In geothermal energy extraction, which method employs a closed-loop system to transfer heat using a working fluid?

Accepted Answer

Binary cycle

Answer

Direct use

Answer

Flash steam

Answer

Dry steam

Question 34

In petrothermal geothermal systems, what is the primary fluid type?

Accepted Answer

Hot dry rock

Answer

Water

Answer

Steam

Answer

Brine

Question 35

Which type of geothermal system is commonly found in sedimentary basins and characterized by high pore pressures?

Accepted Answer

Geopressured

Answer

Magmatic

Answer

Petrothermal

Answer

Hydrothermal

Question 36

What distinguishes magmatic geothermal systems from others?

Accepted Answer

Presence of molten rock

Answer

High salinity

Answer

Low permeability

Answer

Absence of water

Question 37

Which type of geothermal system is categorized as non-conventional due to its low temperature and potential for direct heat applications?

Accepted Answer

Low-temperature

Answer

Petrothermal

Answer

Geopressured

Answer

High-temperature

Question 38

The primary factor influencing the temperature of geothermal fluids is:

Accepted Answer

Depth

Answer

Fluid composition

Answer

Pressure

Answer

Geological structure

Question 39

Which type of geothermal system is commonly associated with subsurface faults and fractures?

Accepted Answer

Hydrothermal

Answer

Petrothermal

Answer

Magmatic

Answer

Low-temperature

Question 40

When selecting a geothermal system for energy development, a key consideration is:

Accepted Answer

Reservoir properties

Answer

Environmental impact

Answer

Social acceptance

Answer

Cost of exploration

Question 41

Which geothermal system type is distinguished by the presence of steam as the primary fluid?

Accepted Answer

Vapor-dominated

Answer

Petrothermal

Answer

Liquid-dominated

Answer

Low-temperature