Coal Technology Qualification related questions
What is the primary constituent of coal?
A) Carbon
B) Hydrogen
C) Oxygen
D) Nitrogen
Answer: A
Which type of coal has the highest carbon content?
A) Peat
B) Lignite
C) Bituminous
D) Anthracite
Answer: D
Which process involves the conversion of coal into a synthetic gas consisting primarily of methane (CH4)?
A) Coal gasification
B) Coal liquefaction
C) Carbonization
D) Combustion
Answer: A
What is the approximate moisture content of raw coal?
A) 1-5%
B) 5-10%
C) 10-20%
D) 20-30%
Answer: C
Which pollutant is typically associated with the combustion of coal?
A) Carbon dioxide (CO2)
B) Sulfur dioxide (SO2)
C) Nitrogen oxide (NOx)
D) Methane (CH4)
Answer: B
What is the process of reducing sulfur emissions from coal combustion called?
A) Carbonization
B) Gasification
C) Desulfurization
D) Liquefaction
Answer: C
Which country has the largest proven coal reserves?
A) China
B) United States
C) India
D) Russia
Answer: A
Which type of coal is most commonly used for electricity generation?
A) Peat
B) Lignite
C) Bituminous
D) Anthracite
Answer: C
What is the main advantage of using coal gasification compared to conventional coal combustion?
A) Higher efficiency
B) Lower greenhouse gas emissions
C) Reduced sulfur emissions
D) Less ash production
Answer: A
Which element is found in coal and contributes to its heating value but also causes environmental concerns?
A) Mercury
B) Lead
C) Chromium
D) Nickel
Answer: A
Which of the following is a byproduct of coal combustion that can be used in construction materials?
A) Fly ash
B) Sulfur dioxide
C) Carbon monoxide
D) Methane
Answer: A
Which process converts solid coal into liquid hydrocarbons suitable for use as fuels?
A) Gasification
B) Liquefaction
C) Carbonization
D) Desulfurization
Answer: B
Which environmental issue is primarily associated with coal mining rather than coal combustion?
A) Acid rain
B) Greenhouse gas emissions
C) Land subsidence
D) Water pollution
Answer: D
Which type of coal has the lowest energy content and highest moisture content?
A) Peat
B) Lignite
C) Bituminous
D) Anthracite
Answer: A
Which process involves the heating of coal in the absence of air to obtain coke?
A) Gasification
B) Carbonization
C) Liquefaction
D) Desulfurization
Answer: B
Which pollutant contributes to acid rain formation from coal combustion?
A) Carbon dioxide (CO2)
B) Sulfur dioxide (SO2)
C) Nitrogen oxide (NOx)
D) Particulate matter (PM)
Answer: B
Which method is used to extract coal reserves that are located deep underground?
A) Open-pit mining
B) Shaft mining
C) Strip mining
D) Placer mining
Answer: B
Which gas is released during the initial stages of coal combustion and is highly flammable?
A) Carbon dioxide (CO2)
B) Methane (CH4)
C) Hydrogen sulfide (H2S)
D) Carbon monoxide (CO)
Answer: D
Which environmental impact is directly related to subsidence caused by underground coal mining?
A) Air pollution
B) Water contamination
C) Soil erosion
D) Land deformation
Answer: D
Which technology is used to capture and store carbon dioxide emissions from coal-fired power plants?
A) Carbon capture and storage (CCS)
B) Electrostatic precipitators
C) Wet scrubbers
D) Baghouses
Answer: A
Which type of coal contains a moderate amount of volatile matter and is widely used in industrial applications?
A) Peat
B) Lignite
C) Bituminous
D) Anthracite
Answer: C
Which process involves the removal of sulfur from coal before it is burned?
A) Gasification
B) Carbonization
C) Liquefaction
D) Desulfurization
Answer: D
Which environmental concern is associated with coal mining but not with coal combustion?
A) Greenhouse gas emissions
B) Acid rain
C) Land subsidence
D) Water pollution
Answer: C
Which element, found in trace amounts in coal, can pose health risks when released into the atmosphere during combustion?
A) Lead
B) Mercury
C) Arsenic
D) Cadmium
Answer: B
Which type of coal is formed from peat through the process of pressure and heat over time?
A) Lignite
B) Bituminous
C) Anthracite
D) Subbituminous
Answer: A
Which pollutant is a major contributor to the formation of ground-level ozone from coal combustion?
A) Carbon dioxide (CO2)
B) Sulfur dioxide (SO2)
C) Nitrogen oxide (NOx)
D) Particulate matter (PM)
Answer: C
Which technology is used to reduce particulate emissions from coal-fired power plants?
A) Electrostatic precipitators
B) Carbon capture and storage (CCS)
C) Wet scrubbers
D) Baghouses
Answer: A
Which type of coal has the highest heating value per unit mass?
A) Peat
B) Lignite
C) Bituminous
D) Anthracite
Answer: D
Which term describes the process of physically separating impurities from coal before it is burned?
A) Gasification
B) Carbonization
C) Beneficiation
D) Desulfurization
Answer: C
Which environmental impact is associated with acid mine drainage from coal mines?
A) Air pollution
B) Water contamination
C) Soil erosion
D) Land deformation
Answer: B
Which type of coal has the lowest sulfur content?
A) Peat
B) Lignite
C) Bituminous
D) Anthracite
Answer: D
Which element, found in coal ash, can leach into groundwater and pose health risks?
A) Lead
B) Mercury
C) Arsenic
D) Cadmium
Answer: C
Which technology is used to capture sulfur dioxide emissions from coal combustion?
A) Electrostatic precipitators
B) Carbon capture and storage (CCS)
C) Wet scrubbers
D) Baghouses
Answer: C
Which environmental issue is directly related to the release of methane from coal mines?
A) Acid rain
B) Greenhouse gas emissions
C) Soil erosion
D) Land subsidence
Answer: B
Which type of coal is often referred to as “brown coal” and has a lower energy content than other types?
A) Peat
B) Lignite
C) Bituminous
D) AnthraciteWhich type of coal is often referred to as “brown coal” and has a lower energy content than other types?
A) Peat
B) Lignite
C) Bituminous
D) Anthracite
Answer: B
Which process involves the blending of different types of coal to improve combustion characteristics?
A) Gasification
B) Carbonization
C) Beneficiation
D) Blending
Answer: D
Which pollutant is primarily responsible for the formation of haze and smog from coal combustion?
A) Carbon dioxide (CO2)
B) Sulfur dioxide (SO2)
C) Nitrogen oxide (NOx)
D) Particulate matter (PM)
Answer: D
Which environmental issue is associated with the disposal of coal ash from power plants?
A) Air pollution
B) Water contamination
C) Soil erosion
D) Land subsidence
Answer: B
Which type of coal is formed from lignite under increased pressure and heat?
A) Bituminous
B) Anthracite
C) Subbituminous
D) Peat
Answer: A
Which technology is used to reduce mercury emissions from coal-fired power plants?
A) Electrostatic precipitators
B) Carbon capture and storage (CCS)
C) Wet scrubbers
D) Mercury scrubbers
Answer: D
Which term describes the process of converting coal into a liquid fuel that can be used in diesel engines?
A) Gasification
B) Liquefaction
C) Carbonization
D) Desulfurization
Answer: B
Which environmental impact is associated with the release of heavy metals from coal combustion?
A) Air pollution
B) Water contamination
C) Soil erosion
D) Land subsidence
Answer: B
Which gas, released during coal combustion, contributes to global warming by trapping heat in the atmosphere?
A) Carbon dioxide (CO2)
B) Methane (CH4)
C) Nitrous oxide (N2O)
D) Hydrofluorocarbons (HFCs)
Answer: A
Which type of mining involves removing layers of soil and rock to expose coal seams?
A) Shaft mining
B) Strip mining
C) Placer mining
D) Open-pit mining
Answer: B
Which process involves the chemical reaction of coal with oxygen and water vapor to produce synthesis gas?
A) Gasification
B) Liquefaction
C) Carbonization
D) Desulfurization
Answer: A
Which environmental concern is associated with the release of particulate matter from coal combustion?
A) Acid rain
B) Global warming
C) Smog formation
D) Soil contamination
Answer: C
Which element, found in coal, can be released into the atmosphere as a result of improper coal combustion?
A) Lead
B) Mercury
C) Arsenic
D) Cadmium
Answer: B
Which technology is used to reduce emissions of nitrogen oxides (NOx) from coal-fired power plants?
A) Electrostatic precipitators
B) Selective catalytic reduction (SCR)
C) Wet scrubbers
D) Baghouses
Answer: B
Which type of coal is a transitional form between lignite and bituminous coal?
A) Anthracite
B) Peat
C) Subbituminous
D) Semi-anthracite
Answer: C
Which process involves the use of heat and pressure to convert coal into solid blocks of coke?
A) Gasification
B) Liquefaction
C) Carbonization
D) Desulfurization
Answer: C