Aluminum sulfate in natural alkaline water Al2 (SO4)3 + 3 Ca (HCO3)2 2 Al (OH)3 + 3 CaSO4 + 6 CO2 2. Expected Values Let X be a discrete random variable having a probability mass function f (xk), k = 1, 2,, n The expected value of X is defined as n = E 6 X @ = ! Bring your club to Amazon Book Clubs, start a new book club and invite your friends to join, or find a club thats right for you for free. Environmental Engineering Reference Manual Pe The Environmental Engineering Reference Manual is the most comprehensive textbook for the NCEES Environmental PE exam. I would recommend it to anyone who is looking for a solid source to take with them to the test. To see the average pass rate of first time test takers during the last exam. T = minutes of contact time with the disinfectant in each segment, prior to first consumer V = volume Baffling Factor = T10 Ttheoretical T (min) = V(gal) BF peak flow (gal/min) Baffling condition Unbaffled EPA Baffling Factors T10/T* Baffling Description 0.1 None, agitated basin, very low length to width ratio, high inlet and outlet flow velocities, unbaffled, inlet and outlet at the same levels. Comparative Acutely Lethal Doses Actual Ranking No. I highly recommend this course to everybody who wants to pursue a technical career. Also, these filtration credits do not apply to point-of-use devices. Centrifugal Pump Characteristics PUMP PERFORMANCE CURVES (CONSTANT N, D, ) HEAD, H NPSHR POWER, P EFFICIENCY, P NET POSITIVE SUCTION HEAD REQUIRED, NPSHR H FLOW RATE, Q Net Positive Suction Head Available (NPSHA) P V 2 Pvapor NPSHA = tatm ! Flammability Flammable describes any solid, liquid, vapor, or gas that will ignite easily and burn rapidly. H H s f tg g 2g Patm = atmospheric pressure at fluid reservoir surface Hs = elevation difference between the level of the fluid reservoir surface (zero datum) and the centerline of the pump suction inlet 2018 NCEES 13 Chapter 1: Water Hf = friction losses from fluid source to pump inlet V = fluid velocity at pump inlet Pvapor = fluid vapor pressure at pump inlet = fluid density g = gravitational constant Fluid power, Wofluid = tgHQ tgHQ Pump ^brake h power, Wo = h pump Wo Purchased power, Wopurchased = hmotor hpump = pump efficiency ^0 to 1h hmotor = motor efficiency ^0 to 1h H = head increase provided by pump Pump Power Equation Wo = Qch/h = Qtgh/ht Q = volumetric flow (m3/s or cfs) h = head (m or ft) the fluid has to be lifted t = total efficiency _hpump # hmotor i Wo = power (kgm2/sec3 or ft-lbf/sec) Performance of Components Fans, Pumps, and Compressors Scaling Laws; Affinity Laws; Fan Laws Q Q d n =d n ND3 2 ND3 1 d mo mo n =d n tND3 2 tND3 1 d H H n = d 2 2n N 2D 2 2 ND 1 d P P n = d 2 2n tN 2 D 2 2 tN D 1 e Wo Wo o 3 5o = e tN D 2 tN3D5 1 Q = volumetric flow rate mo = mass flow rate H = head P = pressure rise Wo = power 2018 NCEES 14 Chapter 1: Water = fluid density N = rotational speed D = impeller diameter Subscripts 1 and 2 refer to different but similar machines or to different operating conditions of the same machine. Below are the steps to get it. Please try again later. 2018 NCEES 117 Chapter 5: Environmental Health and Safety U.S. There was a problem loading your book clubs. k h = C c L m Ra Ln L = length of the plate (cylinder) in the vertical direction RaL = Rayleigh Number = g `Ts T3j L3 Pr 2 Ts = surface temperature (K) T = fluid temperature (K) = coefficient of thermal expansion (1/K) 2 (For an ideal gas: b = with T in absolute temperature) Ts + T3 = kinematic viscosity (m2/s) Range of RaL 104109 1091013 2018 NCEES C 0.59 0.10 n 1/4 1/3 182 Chapter 6: Associated Engineering Principles Long Horizontal Cylinder in Large Body of Stationary Fluid k h = C c D m Ra nD where Ra D = g `Ts T3j D 3 Pr 2 RaD 10 102 102104 104107 1071012 3 C 1.02 0.850 0.480 0.125 n 0.148 0.188 0.250 0.333 Heat Exchangers The rate of heat transfer in a heat exchanger is Qo = UAFDTlm A = any convenient reference area (m2) F = correction factor for log mean temperature difference for more complex heat exchangers (shell and tube arrangements with several tube or shell passes or cross-flow exchangers with mixed and unmixed flow); otherwise F = 1. Learn more. 160 162 400 278 144 58.3 32.0 158 82.0 84.0 106 58.4 79.8 54.1 66.7 139 n.a. nPr is an alternative notation for P(n,r) 2. The probability of an impossible event is 0 and that of an event certain to occur is 1. 2018 NCEES 31 Chapter 1: Water Storm Return Period The probability of exceedance at least once in n years is 1 n P _ X $ xT at least once in n years i = 1 c1 T m which is the probability that a T-year return period event will occur at least once in n years. The exam appointment time is 9 hours and . Ferrous chloride 3 FeCl2 + 2 PO43 Fe3(PO4)2 () + 6 Cl 3. [PDF Download] African Temples of the Anunnaki: The Lost Technologies of the Gold Mines of Enki Popular full - by Michael Tellinger [PDF Download] An Interdisciplinary Approach to Homecare Popular Best Epub - by Cindy Krafft [PDF Download] Are 5 in a Flash: Rapid Review of Key Topics Read full - by Gary E. Demele While logged in, visit the NCEES reference handbooks web page. The review materials are a good representation of what you could see on the PE exam. Film Boiling Surface completely covered by vapor blanket; includes significant radiation through vapor film. The PE license marks someone as a leader in their field. Pesticide Toxicity Categories Signal Word on Label Toxicity Category Acute-Oral LD50 for Rats Amount Needed to Kill an Average Size Adult DangerPoison Highly Toxic 50 or less Taste to a teaspoon Warning Caution Caution Moderately Toxic Slightly Toxic Relatively Nontoxic 50 to 500 500 to 5,000 >5,000 One to six teaspoons One ounce to a pint More than a pint Notes Skull and crossbones; Keep Out of Reach of Children Keep Out of Reach of Children Keep Out of Reach of Children Keep Out of Reach of Children Regulating Pesticides, Washington, D.C.: U.S. Environmental Protection Agency. 509 44 4MB Read more. New York: Wiley, 1982, p. 512. Plug-Flow Reactor (PFR) x= C A0 VPFR = C A0 FA0 #0 XA dX A _ rA i FA0 = moles of A fed per unit time Continuous-Stirred Tank Reactor (CSTR) For a constant volume, well-mixed CSTR x = VCSTR = X A rA FA0 C A0 rA is evaluated at exit stream conditions. I used the Environmental reference for about 75 of the questions. After failing the PE exam once I invested in review courses, worked hard, and passed on my second try! Full content visible, double tap to read brief content. Be the first to receive exclusive offers and the latest news on our products and services directly in your inbox. These TLVs apply to physically fit and acclimatized individuals wearing light summer clothing. Handles Not or Cut-outs GOOD Coupling GOOD FAIR POOR Not POOR Loose Part / Irreg. Reproduced with permission of John Wiley & Sons, Inc. For a compressible fluid, use the above incompressible fluid equation if the Mach number 0.3. Where can you find the best practice problems? _i, j i ! Ensure exam day success with the PE Environmental Reviewfrom Michael R. Lindeburg, PE. Jet Propulsion v v v Vennard, John K., and Robert L. Street. College is not the real world, and in order to be a great engineer you have to get out into the real world and start applying what youve learned. of H2O in. If a purchase cost is available for an item of equipment in year M, the equivalent current cost would be found by: Current $ = _Cost in year M i d Current Index n Index in year M Construction Construction project scheduling and analysis questions may be based on either the activity-on-node method or the activity-onarrow method. No printed copies of the handbook will be allowed in the exam room. New York: Wiley, 1982, p. 407. It is given by AB = axbx + ayby + azbz = A B cos i = BA The cross product is a vector product of magnitude B A sin which is perpendicular to the plane containing A and B. Richard A. Rula School of Civil & Environmental Engineering - Bagley . CT is the concentration of chlorine in water multiplied by the time of contact that the chlorine has with the water. Here are the steps to get your free PDF copy of the PE Reference Handbook directly through NCEES: Create a MyNCEES account or log in if you've already created one. This site is like a library, Use search box in the widget to get ebook that you want. Examples are the ACGIH Threshold Limit Values (TLV): Compound Ammonia Chlorine Ethyl Chloride Ethyl Ether TLV 25 0.5 1,000 400 Noncarcinogens For noncarcinogens, a hazard index (HI) is used to characterize risk from all pathways and exposure routes. Bromoacetic acid and dibromoacetic acid are regulated with this group but have no MCLGs. - Equivalent sound-level contours used in determining the A-weighted sound level on the basis of an octave-band analysis are shown. Signal Words The signal word found on every product's label is based on test results from various oral, dermal, and inhalation toxicity tests, as well as skin and eye corrosion assays in some cases. Instead, be open to anything that will offer you the ability to apply what youve learned in college. ", "This review course is very rigorous, but the amount of problems and difficulty of subjects cover what you need to be prepared for the exam. 2018 NCEES 168 2018 NCEES Periodic Table of Elements I VIII 1 2 H He 1.0079 Atomic Number II Symbol IV V VI VII 4.0026 9 10 B C N O F Ne 20.179 5 3 4 Li Be 6.941 9.0122 10.811 12.011 14.007 15.999 18.998 11 12 13 14 15 16 17 18 Na Mg Al Si P S Cl Ar 22.990 24.305 26.981 28.086 30.974 32.066 35.453 39.948 Atomic Weight 6 7 8 169 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 39.098 40.078 44.956 47.88 50.941 51.996 54.938 55.847 58.933 58.69 63.546 65.39 69.723 72.61 74.921 78.96 79.904 83.80 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe 85.468 87.62 88.906 91.224 92.906 95.94 (98) 101.07 102.91 106.42 107.87 112.41 114.82 118.71 121.75 127.60 126.90 131.29 5771 55 56 Cs Ba 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn 132.91 137.33 87 88 178.49 180.95 183.85 186.21 190.2 192.22 195.08 196.97 200.59 204.38 207.2 208.98 (209) (210) (222) 104 105 106 107 108 109 110 111 112 113 114 115 116 Fr 117 118 Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Uut Fl Uup Lv Uus Uuo (223) 226.02 (261) (262) (266) (264) (269) (268) (269) (272) (277) unknown (289) unknown (298) Lanthanide Series Actinide Series 89103 unknown unknown 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu 138.91 140.12 140.91 144.24 (145) 150.36 151.96 157.25 158.92 162.50 164.93 167.26 168.93 173.04 174.97 103 89 90 91 92 93 94 95 96 97 98 99 100 101 102 Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr 227.03 232.04 231.04 238.03 237.05 (244) (243) (247) (247) (251) (252) (257) (258) (259) (260) Chapter 6: Associated Engineering Principles III 2018 NCEES Important Families of Organic Compounds FAMILY 170 Alkene Alkyne CH3CH3 H2C = CH2 HC CH Ethene Ethyne or or Ethylene Acetylene Ethylene Acetylene IUPAC Name Ethane Common Name Ethane Arene RH RCH = CHR RC CH R2C = CHR RC CR Ester O O O CH3CH CH3CCH3 CH3COH CH3COCH3 Methanamine Ethanal Acetone Ethanoic Acid Methyl Methylamine Acetaldehyde Dimethyl ketone Acetic Acid O O Alcohol Ether Amine CH3CH2Cl CH3CH2OH CH3OCH3 CH3NH2 Benzene Chloroethane Ethanol Methoxymethane Benzene Ethyl chloride Ethyl alcohol Dimethyl ether ArH RX ROH ROR RCH = CH2 General Formula Carboxylic Acid Haloalkane RNH2 R2NH R3N R2C = CR2 CH Functional Group and CC bonds C=C C C Aromatic Ring C X C OH C O C C N Aldehyde O Ketone R1CR2 O O O C C H Methyl acetate O O RCOH RCH C ethanoate RCOR O OH C O C Chapter 6: Associated Engineering Principles Specific Example Alkane Chapter 6: Associated Engineering Principles Common Names and Molecular Formulas of Some Industrial (Inorganic and Organic) Chemicals Common Name Muriatic acid Cumene Styrene Gypsum Limestone Dolomite Bauxite Anatase Rutile Pyrite Epsom salt Hydroquinone Soda ash Salt Potash Baking soda Lye Caustic soda Carbolic acid Aniline Toluene Xylene Neopentane Magnetite Quicksilver Heavy water Eyewash Laughing gas Wolfram Brine Battery acid 2018 NCEES Chemical Name Hydrochloric acid Isopropyl benzene Vinyl benzene Hypochlorite ion Chlorite ion Chlorate ion Perchlorate ion Calcium sulfate Calcium carbonate Magnesium carbonate Aluminum oxide Titanium dioxide Titanium dioxide Vinyl chloride Ethylene oxide Ferrous sulfide Magnesium sulfate p-Dihydroxy benzene Sodium carbonate Sodium chloride Potassium carbonate Sodium bicarbonate Sodium hydroxide Sodium hydroxide Vinyl alcohol Phenol Aminobenzene Urea Methyl benzene Dimethyl benzene Silane Ozone 2,2-Dimethylpropane Ferrous/ferric oxide Mercury Deuterium oxide Borane Boric acid (solution) Deuterium Tritium Nitrous oxide Phosgene Tungsten Permanganate ion Dichromate ion Hydronium ion Sodium chloride (solution) Sulfuric acid 171 Molecular Formula HCl C6H5CH(CH3)2 C6H5CH=CH 2 OCl1 ClO21 ClO31 ClO41 CaSO4 CaCO3 MgCO3 Al2O3 TiO2 TiO2 CH2=CHCl C2H4O FeS MgSO4 C6H4(OH)2 Na2CO3 NaCl K2CO3 NaHCO3 NaOH NaOH CH2=CHOH C6H5OH C6H5NH2 (NH2)2CO C6H5CH3 C6H4(CH3)2 SiH4 O3 CH3C(CH3)2CH3 Fe3O4 Hg (H2)2O BH3 H3BO3 H2 H3 N 2O COCl2 W MnO41 Cr2O72 H3O+1 NaCl H2SO4 Chapter 6: Associated Engineering Principles Properties of Metals Metal Aluminum Antimony Arsenic Barium Beryllium Bismuth Cadmium Caesium Calcium Cerium Chromium Cobalt Copper Gallium Gold Indium Iridium Iron Lead Lithium Magnesium Manganese Mercury Molybendum Nickel Niobium Osmium Palladium Platinum Potassium Rhodium Rubidium Ruthenium Silver Sodium Strontium Tantalum Thallium Thorium Tin Titanium Tungsten Uranium Vanadium Zinc Zirconium 2018 NCEES Symbol Al Sb As Ba Be Bi Cd Cs Ca Ce Cr Co Cu Ga Au In Ir Fe Pb Li Mg Mn Hg Mo Ni Nb Os Pd Pt K Rh Rb Ru Ag Na Sr Ta Tl Th Sn Ti W U V Zn Zr Density Atomic (kg/m3) Weight Water = 1000 26.98 121.75 74.92 137.33 9.012 208.98 112.41 132.91 40.08 140.12 52 58.93 63.54 69.72 196.97 114.82 192.22 55.85 207.2 6.94 24.31 54.94 200.59 95.94 58.69 92.91 190.2 106.4 195.08 39.09 102.91 85.47 101.07 107.87 22.989 87.62 180.95 204.38 232.04 118.69 47.88 183.85 238.03 50.94 65.38 91.22 2,698 6,692 5,776 3,594 1,846 9,803 8,647 1,900 1,530 6,711 7,194 8,800 8,933 5,905 19,281 7,290 22,550 7,873 11,343 533 1,738 7,473 13,547 10,222 8,907 8,578 22,580 11,995 21,450 862 12,420 1,533 12,360 10,500 966 2,583 16,670 11,871 11,725 7,285 4,508 19,254 19,050 6,090 7,135 6,507 Melting Point (C) Melting Point (F) Specific Heat [J/(kgK)] 660 630 subl. _i, j i ! Saturated Boiling Liquid temperature slightly exceeds the saturation temperature; bubbles forming at the surface are propelled through liquid by buoyancy forces. Instead, the computer-based exam will include a PDF version of the handbook for your use. TWA Noise Level D TWA , 90 + 16.61 c log10 100 m TWA in dBA D = percentage dose Em = mixed exposure n c Em = / ti i=1 i Heat Stress Wet-Bulb Globe Temperature (WBGT) Average WBGT = (WBGT1)(t1)+ (WBGT2)(t2) ++(WBGTn)(tn) /[(t1)+(t2)+(tn)] For indoor and outdoor conditions with no solar load, WBGT is calculated as: WBGT = 0.7NWB + 0.3GT For outdoors with a solar load, WBGT is calculated as WBGT = 0.7NWB + 0.2GT + 0.1DB WBGT = Wet-Bulb Globe Temperature Index NWB = Natural Wet-Bulb Temperature DB = Dry-Bulb Temperature GT = Globe Temperature 2018 NCEES 132 Chapter 5: Environmental Health and Safety OSHA-Permissible Heat Exposure Threshold Limit Value ------------- Work Load* -----------Work/rest regimen Continuous work 75% Work, 25% rest, each hour 50% Work, 50% rest, each hour 25% Work, 75% rest, each hour Light 30.0C (86F) 30.6C (87F) 31.4C (89F) 32.2C (90F) Moderate 26.7C (80F) 28.0C (82F) 29.4C (85F) 31.1C (88F) Heavy 25.0C (77F) 25.9C (78F) 27.9C (82F) 30.0C (86F) These TLV's are based on the assumption that nearly all acclimatized, fully clothed workers with adequate water and salt intake should be able to function effectively under the given working conditions without exceeding a deep body temperature of 38C (100.4F). The number of different permutations of n distinct objects taken r at a time is P ^n, r h = n! Most likely, that ideal job youre imagining doesnt truly exist. OSHA WBGT Correction Factors in C Clothing type Summer lightweight working clothing Cotton coveralls Winter work clothing Water barrier, permeable Clo* value WBGT correction 0.6 1.0 1.4 1.2 0 2 4 6 * Clo: insulation value of clothing. U = overall heat-transfer coefficient based on area A and the log mean temperature difference [W/(m2K)] Tlm = log mean temperature difference (K) Overall Heat-Transfer Coefficient for Concentric Tube and Shell-and-Tube Heat Exchangers D ln e Do o R R fo i 1 = 1 + fi + + + 1 Ao ho Ao UA hi Ai Ai 2rkL Ai = inside area of tubes (m2) Ao = outside area of tubes (m2) Di = inside diameter of tubes (m) Do = outside diameter of tubes (m) hi = convection heat-transfer coefficient for inside of tubes [W/(m2K)] ho = convection heat-transfer coefficient for outside of tubes [W/(m2K)] k = thermal conductivity of tube material [W/(mK)] Rfi = fouling factor for inside of tube [(m2K)/W] Rfo = fouling factor for outside of tube [(m2K)/W] 2018 NCEES 183 Chapter 6: Associated Engineering Principles Log Mean Temperature Difference (LMTD) For counterflow in tubular heat exchangers, DTlm = _THo - TCi i - _THi - TCoi ln d THo - TCi n THi - TCo For parallel flow in tubular heat exchangers, DTlm = `THo TCo j `THi TCi j T T ln e THo TCo o Hi Ci Tlm = log mean temperature difference (K) THi = inlet temperature of the hot fluid (K) THo = outlet temperature of the hot fluid (K) TCi = inlet temperature of the cold fluid (K) TCo = outlet temperature of the cold fluid (K) Heat Exchanger Effectiveness, Qo actual heat-transfer rate = f= o Qmax maximum possible heat-transfer rate f= C _T - TCi i CH _THi - THoi or f = C Co Cmin _THi - TCi i Cmin _THi - TCi i C = mc o P = heat capacity rate (W/K) Cmin = smaller of CC or CH Number of Transfer Units (NTU) NTU = UA Cmin Effectiveness-NTU Relations C Cr = min = heat capacity ratio Cmax For parallel flow concentric tube heat exchanger, f= 1 - exp 8- NTU ^1 + Cr hB 1 + Cr NTU = - 2018 NCEES ln 81 - f ^1 + Cr hB 1 + Cr 184 Chapter 6: Associated Engineering Principles For counterflow concentric tube heat exchanger, f= 1 - exp 8- NTU ^1 - Cr hB 1 - Crexp 8- NTU ^1 - Cr hB f = NTU 1 + NTU 1 ln f - 1 NTU = Cr - 1 c fCr - 1 m NTU = f 1- f ^Cr< 1h ^Cr = 1h ^Cr< 1h ^Cr = 1h Radiation Types of Bodies Any Body For any body: + + = 1 = absorptivity (ratio of energy absorbed to incident energy) = reflectivity (ratio of energy reflected to incident energy) = transmissivity (ratio of energy transmitted to incident energy) Opaque Body For an opaque body: + = 1 Gray Body A gray body is one for which = , (0 < < 1; 0 < < 1) = emissivity of the body For a gray body: + = 1 Real bodies are frequently approximated as gray bodies. Slight tingling sensation. You will only be allowed to use the NCEES supplied electronic reference on the exam. Specific hazard rate 7. Hazen-Williams Equation Values of Hazen-Williams Coefficient C V = k1 CR H0.63 S0.54 Pipe Material Ductile iron Concrete (regardless of age) Cast iron: New 5 yr old 20 yr old Welded steel, new Wood stave (regardless of age) Vitrified clay Riveted steel, new Brick sewers Asbestos-cement Plastic C = roughness coefficient k1 = 0.849 for SI units k1 = 1.318 for USCS units RH = hydraulic radius (ft or m) S = slope of energy grade line = hf /L (ft/ft or m/m) V = velocity (ft/sec or m/s) 2018 NCEES 9 C 140 130 130 120 100 120 120 110 110 100 140 150 Chapter 1: Water Circular Pipe Head Loss Equation (Head Loss Expressed in Feet) 4.73 L Q1.852 = K l Q1.852 C1.852 D 4.87 hf = head loss (ft) hf = L = pipe length (ft) D = pipe diameter (ft) Q = flow (cfs) C = Hazen-Williams coefficient K l = friction coefficient Hardy Cross Method for Pipe Networks Using Hazen-Williams Equation Q = / hf h 1.85 / f Q Q = flow correction (gpm) Circular Pipe Head Loss Equation (Head Loss Expressed as Pressure) U.S.
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