53 Questions
What is the first step in generating electricity from coal?
Pulverizing the coal into a fine powder
What is a major drawback of building coal-fired power stations in South Africa?
High construction cost
What propels the blades of a turbine in a coal-fired electricity generation process?
Steam
Which environmental issue is specifically associated with underground coal mining?
Health risks
Which country has extensive coal reserves according to the text?
South Africa
How does coal combustion contribute to environmental problems?
Producing CO2 and airborne particles
What is a disadvantage of coal combustion mentioned in the text?
Emissions of sulfur and nitrogen oxides
What energy source releases high amounts of energy by converting water into steam?
Nuclear energy
What does coal combustion lead to in terms of waste problems?
Production of fly ash
What is the main aim of South Africa's 20-year energy plan?
Diversify the energy mix
What does the burning coal generate in the boilers during electricity generation?
Heat
Why does South Africa find it difficult to expand hydroelectric power?
Dry climate limiting water resources
Which element is NOT mentioned as a waste problem caused by coal combustion?
Hydrogen gas
Which energy source remains the most cost-effective choice according to Eskom?
Coal power
What infrastructure advantage does South Africa have for coal-based electricity according to the text?
Well-developed infrastructure for coal-based electricity
What does the electricity generated from coal do as explained in the text?
Distributes electricity to consumers through power lines
What is an advantage of coal-fired power stations according to the text?
Cost-Effectiveness
What is the final product of the electricity generation process from coal?
Electric current
Which of the following is NOT mentioned as an advantage of coal-based electricity generation?
Renewable Nature
What is the primary purpose of pulverizing coal into a fine powder in the electricity generation process?
To facilitate combustion
Which of the following is a waste problem directly related to coal combustion mentioned in the text?
Emission of sulfur and nitrogen oxides
What drives the blades of a turbine in a coal-fired electricity generation process?
Steam
Which of the following elements is NOT typically released as a result of coal combustion?
$H_2O$ (Water Vapor)
What is a notable disadvantage associated with coal combustion in terms of waste management?
Radioactive elements release
Which element is primarily responsible for turning water into steam during coal-fired electricity generation?
$C$ (Carbon)
'Fly ash' is a waste problem associated with which stage of coal-fired electricity generation?
Boiler Combustion
Which of the following is NOT an advantage of coal-fired power stations mentioned in the text?
Renewable Energy Source
What is a significant environmental impact of coal mining mentioned in the text?
Landscape alteration
Why does coal combustion contribute to acid rain according to the text?
Generation of sulfuric acid
What is a key limitation for South Africa's hydroelectric power expansion?
Geographical restrictions
Which energy source is being explored by Eskom for South Africa's energy needs diversification?
Gas turbine
What is a significant consequence of coal combustion in terms of environmental and health problems?
Release of airborne particles
Why is the construction of coal-fired power stations considered a costly process?
Limitation in geographical locations
What is the main objective of South Africa's 20-year energy plan as mentioned in the text?
Increase nuclear power to 14%
Why is nuclear energy considered an important part of South Africa's energy mix?
To diversify energy sources
Which element is primarily produced through the interaction of water with sulfur-bearing rocks during coal combustion?
Sulfuric acid
What contributes to the local pollution issues exacerbated by clustering power stations in Mpumalanga?
Acid rain concentration
What is the primary function of coal combustion in electricity generation?
To heat water and turn it into steam
Which environmental impact is directly associated with coal combustion?
Emissions of heavy metals
What is the main cause of waste problems related to coal combustion?
Interaction with sulfur-bearing rocks
What aspect makes coal-fired power stations stand out for electricity generation?
Reliability in power generation
Which energy source is considered most economical for generating electricity according to the text?
Coal
What is a notable disadvantage of coal combustion in terms of waste problems?
Emissions of organic compounds
Why is coal combustion a significant concern for environmentalists?
As it results in emissions of greenhouse gases and heavy metals
What factor limits the siting of power stations in South Africa according to the text?
Geographical Limitations
Which of the following is NOT a significant environmental impact of coal mining highlighted in the text?
Water Scarcity
In South Africa, what percentage of the energy mix is planned to be nuclear by 2030?
14%
What is the primary objective of South Africa's 20-year energy plan as mentioned in the text?
Develop a Sustainable Electricity Investment Strategy
Which element, released during coal combustion, contributes to acid rain concentration in Mpumalanga?
$SO_2$
What is a key reason for the limitation of hydroelectric power expansion in South Africa?
Lack of Suitable Sites
Which energy source is being explored by Eskom to diversify South Africa's energy needs?
Wind Power
What is a significant consequence of coal combustion in terms of health problems?
$SO_2$ Exposure
What contributes to the air pollution caused by coal combustion according to the text?
Airborne Particles and $SO_2$
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