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Homework answers / question archive / EGEE 101 EXAM 2 CHAPTER 5 1) A generator works on the principle of electromagnetic induction

EGEE 101 EXAM 2 CHAPTER 5 1) A generator works on the principle of electromagnetic induction

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EGEE 101 EXAM 2

CHAPTER 5
1) A generator works on the principle of electromagnetic induction.


2. Central distribution uses coal, nuclear, hydropower or gas powered plants to generate and transmit electricity over long distances.


3. Electrical energy is measured in terms of KWh.


4. Electric power is measured in terms of voltage. 


5. Most of the electricity in the US is generated using nuclear energy.


6. Wind turbine converts the kinetic energy of air into mechan energy through the rotation of blades.


7. In a gas turbine power plant, which fuel is burned to run the turbine?


8. What is the function of a generator in a power plant?


9. A Cogeneration power plant generates both electric power and useful thermal energy from the same fuel source.


10. A step-up transformer is used to decrease the voltage, so that electricity can be transmitted over long distances.


11. A step down transformer is used to decrease high voltage from transmission lines to low voltage (110V) so it can be distributed to homes and businesses.


12. High voltage transmission lines are used to carry electricity over long distances.


13. Which power plant uses both gas and steam turbine to produce electricity?


14. Which among the following does not use a generator to produce electricity?


15. Electric current is a measure of flow of electric charge.


16. Central distribution is more efficient than distributed generation for transmitting electricity.


17. Electricity can be generated using a magnetic field.


18. A standard steam power plant is more efficient than Cogeneration.


19. Electric power is measured as:


20. Electricity can be generated from fossil fuels.


21. In a nuclear power plant, nuclear reactions are used for converting water into steam.


22. In a power plant, chemical energy is converted to what useful end product?


23. What is the energy conversion that takes place in a turbine in a power plant?


24. Distributed generation reduces the amount of energy lost in transmitting electricity, as electricity is produced very near to the place where it is used.


25. Which of the following primary energy resources contributes the most to the production of electricity?

CHAPTERS 6 & 7
1. Which of the following processes does NOT happen in the global carbon cycle?


2. Fossil fuels are formed due to the interruption of the decay process in the carbon cycle.

3. The starting point of the formation of fossil fuels is the transformation of decaying organic matter to kerogen.

4. Which of the following contributes to the formation of kerogen?

 
5. Kerogen derived from higher plants gets converted to crude oil and natural gas when buried inside the earth for millions of years.

 
6. Kerogens are formed by the transformation of inorganic matter into an insoluble, polymeric material.

7. Kerogen formed from algae or plankton is derived from:

8. Kerogen produced from higher plants gets converted into natural gas.


9. What is necessary for the fossil fuel formation?

10. Kerogens are produced from algae, planktons and higher plants with the help of decomposition by bacteria.


11. Bituminous coal formed in the United States originated during:

 
12. Lignite coal originated during Jurassic period.


13. How many hydrogen atoms are present in coal for one carbon atom?


14. Which one of the following has the highest heating value per pound?


15. The quantity of an energy source that is known to exist and that can be recovered economically is called:


16. Resources are the quantity of an energy source that is economically recoverable.


17. Economic feasibility and geological assurances are two important variables that differentiate resources and reserves.


18. Lifetime predictions for a fossil fuel are done based on available resources.


19. Which among the fossil fuel reserves are abundantly available in United States?


20. Approximately, what percentage of world coal reserves does United States possess?


21. United States has large crude oil reserves.


22. Most of the natural gas reserves in the world are located in United States.

23. Coal reserves are measured in:


24. Cubic feet is used to measure the quantities of:

25. The United States is the largest exporter of coal.

26. Most of the coal found in United States is:

27. In deep mining, coal seams are buried several hundred feet to 1000 ft. deep under the ground.


28. Surface mining requires the removal of top soil and layers of rock to expose beds of coal.


29. Which coal mining equipment uses movable steel props to support the roof of coal mines?

30. Which of the following properties is not measured during Proximate analysis of coal?


31. Volatile matter is the property that is indirectly measured by calculating the difference between the initial mass of coal and the mass of moisture content, ash content and fixed carbon content in the coal.

32. Which of the following properties are not used in ranking of coal?


33. Proximate analysis exactly measures the elemental composition of coal.


34. Lignite is the highest ranked coal.


35. Lignite is the youngest ranked coal.


36. Which coal has the highest fixed carbon content?


37. Anthracite has higher volatile matter content than Bituminous coal.

38. Lignite has higher heating value than Bituminous coal.

39. Low and medium rank coals are ranked on the basis of volatile matter content.

40. In a DAF basis analysis, which of the following properties are excluded?

41. Heating value of coal increases with increase in the rank of coal.

42. With increase in the rank of coals, which one of the following element's composition decreases?


43. In the US, coal is primarily used for carbonization.

44. Which of the following processes is the most efficient way to burn coal?

 
45. Stoker combustion limits the rate of heating of particle to 1 C/sec.


46. Large sized coal pieces can be used during the Stoker combustion process.


47. Which one of the following combustion process uses limestone?


48. 75% of the coal powders used in pulverized coal combustion process are:

49. Which one of the combustion processes uses the lowest furnace temperature (900 - 1000 C) to burn coal?


50. In a fluidized bed combustion, fine coal particles are "fluidized" and burnt using a jet of hot air.

51. Which combustion process reduces the NOx and SOx emissions from coal?

52. Which combustion process has issues with polyaromatic hydrocarbon formation?

53. Coal can be used directly to produce "pig iron" by mixing it with iron ore in a blast furnace.

54. Coke is produced by combustion of coal in a furnace.

55. Carbonization is the process of heating coal in the absence of air to produce coke.

56. Which one of the following is an example of clean coal technology?

CHAPTER 8
1. A naturally occuring liquid fossil fuel resource containing a complex mixture of hydrocarbons is called:

2. The amount of nitrogen in petroleum is more than in coal.


3. Petroleum contains lesser amount of oxygen atoms than coal does.


4. Hydrogen content in petroleum is far greater than in coal.

 
5. The United states consumes double the amount of oil that it produces.


6. Oil Reservoirs are usually found in places that have:


7. How is crude oil separated during the distillation process?


8. Larger molecules tend to have a higher boiling point.


9. Which of the following recovery methods for oil is the most expensive?

10. What is the approximate carbon content in petroleum crude?


11. Crude oil recovered from deep oil reservoirs tend to have:


12. Reservoir rock is a rock that produces crude oil.


13. Based on what property does the distillation column separate crude oil into different fractions?


14. The formula for paraffin cyclohexane is:


15. What is the main function of a refinery?

 
16. What recovery method uses steam, chemicals or bugs?


17. What are the major refining processes?

 
18. One barrel of oil (42 gallons) produces more than a barrel of products.


19. Which hydrocarbons have straight or branched chains of carbon atoms?

 
20. Which of the following media is used in secondary recovery method?

 
21. Which place converts crude oil into useful products such as gasoline, fuel oil, waxes or asphalt?


22. What is the problem with aromatics in the petroleum industry?

 
23. All of the oil in a reservoir can be recovered.

 24. Which of the following compound has an octane rating of 0?


25. How do you increase the octane rating of a fuel?


26. If a paraffin compound has 8 carbon atoms, how many hydrogen atoms are present in the molecule?


27. Smaller molecules tend to have lower viscosity

 
28. Which of the following processes change the shape of a molecule?


29. Which hydrocarbons have benzene and rings of benzene?


30. What is the separation of materials based on differences in the volatility called?

 
31. Viscosity of a lubricating oil should be:

32. How do you define density?

 
33. What does a higher octane number signify?


34. Knocking is a desirable feature in a four stroke engine.

35. What is the process of breaking of heavy molecules into lighter hydrocarbons called?

36. Which of the following recovery methods takes advantage of significant oil pressure in the reservoir?

 
37. If a cycloparaffin compound has six carbon atoms, how many hydrogen atoms are present in the molecule?


38. Viscosity, density and odor are properties that are all related to the geological history of crude oil.


39. Which among the following reservoirs produce the best crude oil?


40. Pour point is the temperature at which the oil starts to flow.


41. Flash point is the temperature at which the oil starts to ignite.

 
42. The performance of gasoline with octane number 87 is similar to the performance of a fuel containing:


43. The desired hydrocarbons in a diesel fuel are:

 

CHAPTER 9
1. The dehydrator removes H2S.


2. Mercaptans are added to give:


3. Natural gas has high CO2 emissions compared to coal.

4. The sweetening process removes H2S.

5. H2S is desirable in natural gas.

6. Methane turns into liquid at:


7. Natural gas has low combustion efficiency.


8. Wet natural gas contains other hydrocarbons.

9. Sour natural gas contains:


10. Transcontinental transportation is done through pipelines.

11. When is natural gas called 'dry'?


12. Natural gas is mainly transported in pipelines under high pressure.


13. Africa has the world's largest reserves of natural gas.


14. Which fossil fuel leaves no ash behind after combustion?


15. Coal bed methane occurs in coal mines.


16. Natural gas has the lowest calorific value among all the fossil fuels.

 
17. Which of these is the major constituent of natural gas?


18. Methane hydrates are crystallized mounds of:

 

 

 

 

 

 

 

 

 

 

 

 

CHAPTER 10
1. Which among the following is not a primary pollutant? CO2
2. Which among the following is a secondary pollutant? Acid rain
3. Which fossil fuel contributes primarily to CO emission? Petroleum
4. Which of the following act as source for CO emissions? Cold start in automobile engines, household heating, cigarette smoking
5. CO emissions are due to complete combustion of carbon in fossil fuels. False
6. CO emission from automobiles is a function of speed. True
7. The transportation sector is the main source for CO emission. True
8. How does CO affect human health? By impairing visibility, affecting central nervous system, heart attack
9. CO emissions from automobiles are reduced with the help of catalytic converters. True
10. Sources for particulate matter are: construction sites, smoke stacks, Reaction of SO2 and NOx emitted from power plants and automobiles in atmosphere
11. Inhalation of particulate matter pollutants results in respiratory diseases. True
12. Particles smaller than 2.5 micrometers are more dangerous for human health as they penetrate deeper into the lungs. True
13. Scattering of light by particles leads to decrease in visibility. True
14. Particles about the size of wavelength of visible light (0.1 - 1 micron) are responsible for reduced visibility due to significant scattering of light. True
15. Which fossil fuel contributes the most to particulate matter emission? Coal
16. Particulate emission can be reduced by using electrostatic precipitators. True
17. Particulates in an electrostatic precipitator get an electric charge and move towards the discharging electrode. False
18. Which of the following are examples of baghouse filters? Reverse-gas, pulse-jet, shake-deflate
19. Particulate emissions from power plants can be controlled by using: electrostatic precipitator
20. Which fossil fuel contributes the most to SO2 emissions? Coal
21. SO2 contributes significantly to the formation of acid rain. True
22. SO2 emissions are primarily due to: Fuel combustion
23. Northwestern US is the region most affected region by acid rain. False
24. SO2 contributes significantly to particulate emissions. True
25. Sulfur emissions can be controlled by: Washing the coal thoroughly before it is burned, Remove during combustion using fluidized bed combustion process, remove after combustion using scrubbers
26. NOx emission is the most difficult primary pollutant to control. True
27. Atmospheric air at high temperatures can be a source for NOx emissions. True
28. Which pollutant is responsible for the formation of Photochemical smog? NOx
29. Thermal NOx is mainly formed due to the combustion of atmospheric nitrogen at temperatures greater than 1000 C. True
30. NOx emission from combustion of natural gas is primarily due to: Thermal NOx
31. NOx emission is responsible for acid rain. True
32. Ground level ozone is formed because of the reaction of hydrocarbon in the presence of sunlight with: NOx
33. Volatile organic compounds contribute to: Formation of photochemical smog, formation of greenhouse gases, it is carcinogenic
34. Which of the following is a greenhouse gas? CO, SO2, NO2, CO2
35. Greenhouse gases absorb the infrared radiation from earth and re-emits in all direction to cause warming of the lower atmosphere. True

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