Font size
WorksheetsKuis Batubara
Total questions: 30
Worksheet time: 15mins
In coal analysis, what does the term "proximate analysis" refer to, and why is it important for understanding coal properties?
Proximate analysis determines the coal's age and geological history, which can impact its energy content.
Proximate analysis measures the coal's chemical composition, including the carbon, hydrogen, and sulfur content.
Proximate analysis assesses the coal's physical properties, such as moisture content, volatile matter, and ash content.
Proximate analysis evaluates the coal's potential for spontaneous combustion during storage and transportation
Which of the following elements contained coal could not be combusted?
Which of the following elements contained coal could not be combusted?
Sulphur
Hydrogen
Oxygen
In coal analysis, what is the significance of the term "ultimate analysis," and what specific components of coal does it focus on? (
) Ultimate analysis measures the coal's energy content and potential heat output
Ultimate analysis evaluates the coal's physical properties, such as moisture content, volatile matter, and ash content
Ultimate analysis determines the coal's chemical composition, focusing on elements like carbon, hydrogen, oxygen, nitrogen, and sulfur.
Ultimate analysis assesses the coal's grindability and particle size distribution for efficient combustion
Which of the following factors is NOT typically considered when analyzing coal for boiler combustion? (
Moisture content
Volatile matter
Carbon dioxide emissions
Heating value
Why is it important to conduct coal analysis in a boiler before combustion?
To determine the boiler's physical dimensions
To calculate the electricity generation capacity
To calculate the electricity generation capacity
To regulate the boiler's water supply
What is the primary environmental concern associated with burning coal for electricity generation?
Release of greenhouse gases
Excessive water usage
Noise pollution
Soil erosion
Which of the following elements is typically found in coal and is a significant contributor to its heating value?
Hydrogen
Calcium
Potassium
Silicon
. Which of the following methods is commonly used to determine the moisture content of coal?
Proximate Analysis
Ultimate Analysis
Bomb Calorimetry
Air-Drying
Which of the following parameters is typically used to classify coal based on its energy content and carbon content?
Volatile Matter
Sulfur Content
Ash Content
Calorific Value
Identify the fuel that leaves more smoke and ash on burning.
Solid fuel
Liquid fuels
Gaseous fuels
Any one of the above
Coal was produced in the earth over millions of years. Which of the following is NOT a step in the production of coal?
The most efficient type of coal to burn is
peat
lignite
bituminous
anthracite
Which of the forms of coal has highest percentage of carbon?
Anthracite
Bituminous
Peat
Lignite
... is the lowest rank of coal with the lowest energy content.
Lignite
Bituminous coal
Bituminous coal contains ...
45-86% hydrocarbons
45-86% carbon
А layer of dead plants was covered bу ...
layers of water and dirt
layers of sand and grass
The energy in coal comes from the energy ...
stored bу plants that lived hundreds of millions of years ago
stored bу plants that live now
Where is a main place Coal forms? Desert, Forests, etc.
Swamp
Desert
Space
The Sun
Why are underground coal mines dangerous?
the roof can collapse
the mine can get too cold
the mine can get too hot
coal mines aren't dangerous
Before it can be burned in a power plant, coal must first be...
crushed (pulverized)
colored black
paid for
weighed
Coal is made from...
old black rocks
dead plant and animal material
buried metals
What is coal mostly used for today?
electricity
trains
farming
heating
what is an almost pure form of carbon obtained from coal?
coal
coal gas
coke
coal tar
what are the products of coal?
coke
natural gas
coal tar
coal gas
petroleum
when was coal formed?
1 billion years ago
900 million years ago
300 million years ago
100 million years ago
1000 years ago
what are the two types of natural resources?
exhaustible and inexhaustible
solar and wind energy
renewable and non renewable
both a and c
both a and b
conversion of dead vegetation into coal is called?
Carbonisation
Distillation
Coal Gas
Natural Gas
Coal tar is a mixture of various substances.
(a) Fossil fuels are ____________, ____________, and ____________ .
Fossil fuels , Coal, Petroleum
Air , Coal, Petroleum, and natural gas
Coal, Petroleum, and natural gas
Coal with largest C content is
anthracite
peat
lignite
bituminous
