Chapters 6&7: Overview and Coal

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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


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