Energy and Enviro Final Review

Energy and Enviro Final Review - PHSC 51 QUIZ 1

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Unformatted text preview: PHSC 51 QUIZ 1 Name:______________________________ Fig 1.6 U.S. Total Yearly Energy Production and Consumption 1.(3 pts.) Briefly discuss the gap between the two curves in Fig. 1.6 above. What are the future implications? United States Production and Consumption 2. (2 pts.) The electric power company bills you for the number of kWh that you use; however, kWh is NOT a power unit. What does kWh stand for and of what quantity is it a unit? Table 2.2(a). Some special energy units. Study Area Equivalent Other Special Unit of Main Use Symbol in Joules Units kilowatt-hour electricity kWh 3,600,000 3413 Btu calorie heat cal 4.186 kilocalorie (food calorie) heat kcal 4186 1000 cal British thermal unit heat Btu 1055 3. (5 pts.) From 1941 to about 1971, electrical energy production in the U.S. doubled every 10 years. What was the approximate percentage growth rate per year? (Show Calculation.) Historical Electrical Energy Consumption 1973 - 2003 Rate of Growth = 3.5 % per Year Period Time per % 70% Time Doubling = Year / % 3.5 % 70 Time Doubling = Years 20 Time Doubling = PHSC 51 QUIZ 2 1. (4 pts.) The 1970 R/P ratio for oil was 10 years? That was 37 years ago. Why are we not out of oil? Reserve to Production Ratios Oil 11.7 9.6 10 Natural Gas 9.25 8.8 14 Coal 465 466 300 1997 1970 2003 (Years) 2. (1 pts.) Why should you never open the back of a TV, even if it is off? Electron Accelerated in TV Picture Tube Cathode Anode TV Picture Tube 3. (1 pts.) What does the bulb do in an ordinary (incandescent) light bulb? Incandescent Light Bulb 4. (4 pts.) You have a 10 and a 15 resistor. What two values of equivalent resistance can you obtain by hooking them in series and in parallel? Series: ___________________ Parallel: __________________ Resistors in Series 3 2 1 R R R R eq + + = Resistors in Parallel 3 2 1 1 1 1 1 R R R R eq + + = 4. (4 pts.) You have a 10 and a 15 resistor. What two values of equivalent resistance can you obtain by hooking them in series and in parallel? Series: ___________________ Parallel: __________________ 25 6 + = 15 1 10 1 1 eq R = + = 30 5 30 2 30 3 = = 6 5 30 eq R PHSC 51 QUIZ 3 1. (3 pts.) Fundamentally, how (why) does a generator work? INDUCTION 2. (2 pts.) What does one accomplish by using a transformer? TRANSFORMER p p s s V N N V n n n n n n n n = Power In = Power Out 3. (2 pts.) Why is electric power, when transmitted long distances, sent at high voltage? Transmission of Power V I P out n = 4. (3 pts.) When coal is burned, what are some of the undesirable by-products produced? COAL : Carbon, Sulfur, Trace Minerals AIR : Nitrogen (78%) Oxygen (21%) Various (1%) Furnace Chemistry PHSC 51 QUIZ 4 1. (2 pts.) What is the main environmental problem associated with sulfur oxides emitted by fossil-fueled power plants? Coal Fueled Power Plants - Major Pollutants 4. Radioactivity Radium (Half Life 1620 Years) Air Water 1. Particulate Matter Smoke (Fly Ash) 2. Noxious Chemicals SOx COx NOx Acid Mist 3. Thermal Pollution Heat 2. (2 pts.) What are allowances and what is their significance?What are allowances and what is their significance?...
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This test prep was uploaded on 04/01/2008 for the course PHSC 051 taught by Professor Staunton during the Spring '08 term at Drake University .

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Energy and Enviro Final Review - PHSC 51 QUIZ 1

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