Chapters 6&7: Overview and Coal
How many hydrogen atoms are present in coal for one carbon atom?
0.8
Approximately, what percentage of world coal reserves does US possess?
25%
Which of the following contributes to the formation of kerogen?
algae, micro-organisms, trees
Which coal has the highest fixed carbon content?
anthracite
In a DAF basis analysis, which of the following properties are excluded
ash and moisture
Most of the coal found in the US is
bituminous coal
Which one of the following is an example of clean coal technology?
carbon dioxide sequestration
Which among the fossil fuel reserves are abundantly available in US?
coal
Which of the following properties is not measured during proximate analysis of coal?
density
True or false: Kerogen derived from higher plants gets converted to crude oil and natural gas when buried inside the earth for millions of years
false
True or false: Proximate analysis exactly measures the elemental composition of coal
false
True or false: The US is the largest exporter of coal
false
True or false: United States has large crude oil reserves
false
True or false: anthracite has higher volatile matter content than Bituminous coal
false
True or false: coal can be used directly to produce "pig iron" by mixing it with iron ore in a blast furnace
false
True or false: coke is produced by combustion of coal in a furnace
false
True or false: in the US, coal is primarily used for carbonization
false
True or false: kerogen produced from higher plants gets converted into natural gas
false
True or false: kerogens are formed by the transformation of inorganic matter into an insoluble, polymeric material
false
True or false: lifetime predictions for a fossil fuel are done based on available resources
false
True or false: lignite has higher heating value than Bituminous coal
false
True or false: lignite is the highest ranked coal
false
True or false: low and medium rank coals are ranked on the basis of volatile matter content
false
True or false: most of the natural gas reserves in the world are located in US
false
True or false: resources are the quantity of an energy source that is economically recoverable
false
True or false: surface mining requires the removal of top soil and layers of rock to expose beds of coal
false
Kerogen formed from algae or plankton is derived from
fats, oils, waxes
Which combustion process has issues with polyaromatic hydrocarbon formation?
fluidized bed combustion
Which combustion process reduces the NOx and SOx emissions from coal?
fluidized bed combustion
Which of the following processes is the most efficient way to burn coal?
fluidized bed combustion
Which one of the following combustion process uses limestone?
fluidized bed combustion
Which one of the combustion processes uses the lowest furnace temperature (900-1000C) to burn coal?
fluidized coal combustion
Which of the following processes does NOT happen in the global carbon cycle?
glucose is formed during the decay process
With increase in the rank of coals, which one of the following element's composition decreases?
hydrogen
Bituminous coal formed in the US originated during
jurassic period, miocene period, carboniferous period
75% of the coal powders used in pulverized coal combustion process are
less than 75 microns in size
Which coal mining equipment uses movable props to support the roof of coal mines?
longwall mining
Coal reserves are measured in
metric tons
Cubic feet is used to measure the quantities of
natural gas
Which one of the following has the highest heating value per pound?
natural gas
Which of the following properties are not used in ranking of coal?
porosity
The quantity of an energy source that is known to exist and that can be recovered economically is called
reserve
What is necessary for the fossil fuel formation?
temperature, pressure, time
True or false: Fossil fuels are formed due to the interruption of the decay process in the carbon cycle.
true
True or false: Lignite is the youngest ranked coal
true
True or false: The starting point of the formation of fossil fuels is the transformation of decaying organic matter to kerogen
true
True or false: carbonization is the process of heating coal in the absence of air to produce coke
true
True or false: economic feasibility and geological assurances are two important variables that differentiate resources and reserves
true
True or false: heating value of coal increases with increase in the rank of coal
true
True or false: in a fluidized bed combustion, fine coal particles are fluidized and burnt using a jet of hot air
true
True or false: in deep mining, coal seams are buried several hundred feet to 1000ft deep under the ground
true
True or false: kerogens are produced from algae, planktons, and higher plants with the help of decomposition by bacteria
true
True or false: large sized coal pieces can be used during the Stoker combustion process
true
True or false: lignite coal originated during Jurassic period
true
True or false: stoker combustion limits the rate of heating of particle to 1 C/sec
true
