14 Questions
Which analysis is performed on a solid fuel, such as coal, to determine the percentages of moisture, volatile matter, fixed carbon, and ash?
Proximate analysis
What is the percentage of moisture in the original sample determined in part one of the proximate analysis?
The loss of mass divided by the original mass
What is the percentage of volatile matter in the original sample determined in part two of the proximate analysis?
The difference between the loss of mass and the percentage of moisture
Which analysis uses chemical methods to determine the elemental components of a fuel, including carbon, nitrogen, oxygen, hydrogen, and sulfur?
Ultimate analysis
What is the calorific value (heat of combustion) of a sample?
The number of heat units released by the sample when burned with oxygen
What are the units used to express the heating value of solid and liquid fuels?
kj/kg
What is the difference between proximate analysis and ultimate analysis?
Proximate analysis determines the moisture content of a fuel, while ultimate analysis determines the elemental components.
Which term is used to refer to the total heat energy released by complete combustion of a unit quantity of fuel?
Higher heating value
What does the lower heating value (LHV) represent?
The heat energy released by complete combustion of a unit quantity of fuel, minus the latent heat of evaporation of water vapor
What is the reduction in heating value (HHV minus LHV) equal to?
The total mass of water vapor per kilogram of fuel multiplied by the latent heat of evaporation
Which physicist is the joule unit named after?
James Prescott Joule
What is the mechanical equivalent of heat?
4.186 kJ/kcal
What is the purpose of the insulating jacket in a bomb calorimeter?
To control heat transfer between the bucket and the surroundings
What is the formula used to calculate the higher heating value of a fuel in a bomb calorimeter?
$ ext{Higher heating value} = rac{ ext{Heat produced by combustion}}{ ext{Mass of fuel}}$
Test your knowledge on bomb calorimeters and their essential components in this quiz. Learn about the origins of the term "calorie" and its usage in measuring heat. Explore the four necessary parts of a bomb calorimeter and their role in fuel combustion and flue gas analysis.
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