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613 710 1,285 271 321 29 840 800 1,860 1,494 1,084 30 1,064 156 2,447 1,540 327 180 650 1,250 39 2,620 1,455 2,425 3,030 1,554 1,772 63 1,963 38.8 2,310 961 97.8 770 3,000 304 1,700 232 1,670 3,387 1,135 1,920 419 1,850 1,220 1,166 subl. Reproduced with permission of John Wiley & Sons, Inc. F = Q(v2 0) F = 2hA2 F = propulsive force = specific weight of the fluid h = height of the fluid above the outlet A2 = area of the nozzle tip Q = A2 2gh v2 = 2gh 2018 NCEES 12 Chapter 1: Water Fluid Flow Machinery Displacement Pump Characteristics Displacement pumps fall into two major classes: reciprocating and rotary, as shown in the figure below. Customary Units) PW = power requirement (hp) W = weight of flow of air (lb/sec) R = engineering gas constant for air = 53.3 ft-lb/(lb air-R) T1 = absolute inlet temperature (R) P1 = absolute inlet pressure (lbf/in2) P2 = absolute outlet pressure (lbf/in2) n = (k - 1)/k = 0.283 for air e = efficiency (usually 0.70 < e < 0.90) 2018 NCEES 23 Chapter 1: Water Specific Gravity for a Solids Slurry Ww + Ws S = (W /1.00 ) + (Ws/Ss) w S = specific gravity of wet sludge Ww = weight of water (lb) Ws = weight of dry solids (lb) Ss = specific gravity of dry solids The volume of waste sludge for a given amount of dry matter and concentration of solids is given by W Ws V = (s/100s ) cS = 7(100 - p) /100A cS V = volume of sludge (ft3 or gal or m3) Ws = weight of dry solids (lb or kg) s = solids content (%) = unit weight of water, 62.4 lb/ft3 (8.34 lb/gal) [1,000 kg/m3] S = specific gravity of wet sludge p = water content (%) BOD5 for Mixed Lagoons in Series S 1 = S0 1 + kp i S0 = Inlet total BOD5 S = Outlet total BOD5 = Fresh-feed residence time kp = Kinetic constant (time1) National Research Council (NRC) Trickling Filter Performance For a single-stage or first-stage rock filter, the equation is E1 = 100 W 1 + 0.0561 VF E1 = efficiency of BOD removal for process at 20C, including recirculation and sedimentation, percent W = BOD loading to filter (lb/day) V = volume of filter media (103 ft3) F = recirculation factor 2018 NCEES 24 Chapter 1: Water The recirculation factor is calculated using R 1+ I F= 2 c1 + 0.1 R m I R = recirculated flow I = raw inflow Dechlorination of Sulfite Compounds Reaction between sodium sulfite and free chlorine residual and combined chlorine residual, as represented by monochloramine: Na2SO3 + Cl2 + H2O Na2SO4 + 2 HCl Methanol Requirement for Biologically Treated Wastewater Cm = 2.47No + 1.53Nl + 0.87Do Cm = required methanol concentration (mg/L) No = initial nitrate-nitrogen concentration (mg/L) Nl = initial nitrite-nitrogen concentration (mg/L) Do = initial dissolved-oxygen concentration (mg/L) BOD Test Solution and Seeding Procedures When the dilution of water is not seeded: D D BOD, mg/L = 1 P 2 When the dilution of water is seeded: (D D2) (B1 B2) f BOD, mg/L = 1 P D1 = dissolved oxygen of diluted sample immediately after preparation (mg/L) D2 = dissolved oxygen of diluted sample after 5-day incubation at 20C (mg/L) Bl = dissolved oxygen of seed control before incubation (mg/L) B2 = dissolved oxygen of seed control after incubation (mg/L) f = fraction of seeded dilution water volume in sample to volume of seeded dilution water in seed control P = fraction of wastewater sample volume to total combined volume 2018 NCEES 25 Chapter 1: Water Ratio of Minimum or of Peak-to-Average Daily Sewage Flow Sewage Flow Rao Curves P 0.2 5 14 + Curve B: 1 4+ P 18 + P Curve G: 4+ P Curve A 2: Population in Thousands (P) Water Pollution Control Federation and American Society of Civil Engineers, Design and Construction of Sanitary and Storm Sewers: American Society of Chemical Engineering, 1970. Powered by Help Scout. If more than 10% of tap water samples exceed the action level, water systems must take additional steps. Contain and control the release. 2018 NCEES 141 6 ASSOCIATED ENGINEERING PRINCIPLES Quadratic Equation ax2 + bx + c = 0 b ! Note that the conversion factor gc [lbm-ft/(lbf-sec2)] should not be confused with the local acceleration of gravity g, which has different units (m/s2 or ft/sec2) and may be either its standard value (9.807 m/s2 or 32.174 ft/sec2) or some other local value. Assuming no friction losses and that no pump or turbine exists between Sections 1 and 2 in the system, 2 2 P2 v2 P 1 v1 + + = + z 2 c 2g c 2g + z1 or 2 2 P2 v2 P 1 v1 + + = + + z g 2 t t 2 2 z1 g P1, P2 = pressure at Sections 1 and 2 v1, v2 = average velocity of the fluid at the sections z1, z2 = vertical distance from a datum to the sections (potential energy) = specific weight of the fluid = g g = acceleration of gravity = fluid density Reynolds Number (Newtonian Fluid) vD vD Re = = where v = average velocity = mass density D = diameter of the pipe, dimension of the fluid streamline, or characteristic length = dynamic viscosity = kinematic viscosity Re = Reynolds number (Newtonian fluid) Flow through a pipe is generally characterized as laminar for Re < 2,100 and fully turbulent for Re > 10,000, and transitional flow for 2,100 < Re < 10,000. Energy Equation The energy equation for steady incompressible flow with no shaft device is v12 P 2 v 22 P1 c + z1 + 2g = c + z2 + 2g + h f or v12 P 2 v 22 P1 + + = + + z z tg 1 2g tg 2 2g + h f hf = head loss, considered a friction effect, and all remaining terms are defined above If the cross-sectional area and the elevation of the pipe are the same at both sections (1 and 2), then z1 = z2 and v1 = v2. The following expression is for the minimum heat flux for a large horizontal plate: qo min = 0.09 tv h fg > vg _tl - tv i _tl + tv i 2 1/4 H The relation above can be in error by 50% or more. This is listed on the standards page of the specs. New York: Wiley, 1982, p. 407. Some questions may be a little easier or a little harder than the actual exam, but they are all designed to bring you success on exam day. Recarbonation Ca2+ + 2 OH + CO2 CaCO3(s) + H2O Coagulation Equations Insoluble products are shown in italics 1. Illness rate 3. The lower the concentration of bacteria in drinking water, the better maintained the water system is. Updates on Exam Content and Procedures NCEES.org is our home on the web. [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 Highly recommended as a foundation for PE preparation. # xdA A # ydA yc = A A = # f ^ xh dx xc = dA = f ^ xh dx = g _ y i dy The first moment of area with respect to the y-axis and the x-axis, respectively, are: My = x dA = xc A Mx = y dA = yc A The moment of inertia (second moment of area) with respect to the y-axis and the x-axis, respectively, are: Iy = x2 dA Ix = y2 dA 2018 NCEES 145 Chapter 6: Associated Engineering Principles The moment of inertia taken with respect to an axis passing through the area's centroid is the centroidal moment of inertia. Instead, the computer-based exam will include a PDF version of the handbook for your use. Instead, be open to anything that will offer you the ability to apply what youve learned in college. CT = concentration time C = mg/L free chlorine in the water where the inactivation is occurring (tanks, pipelines, etc.) WBGTeff = WBGT measured + Clothing Adjustment Factor (CAF) Heat Stress Index HSI = Ereq /Emax * 100 Ereq = Metabolic Convective + Radiant required BTUs heat loss/hour, if > 0 Emax = evaporation rate < 2,400 BTU /hr sweat rate equivalent to 1 liter water/hr Metabolic Work-load category is determined by averaging metabolic rates for the tasks and then ranking them: 1. 5: A Method of Correlating Heat Transfer Data for Surface Boiling of Liquids, Cambridge: The Office of Naval Research, 1951. 151 Chapter 6: Associated Engineering Principles A unit normal distribution table is included at the end of this section. Acids have pH < 7. Where the WBGT of the work area is different from that of the rest area, a time-weighted average should be used (consult the ACGIH 19921993 Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices, 1992). Learn more. It's definitely hard work, but definitely worth it! Grain bins should not be entered when the grain is being removed since grains flow to the center of the emptying bin and create suffocation hazards. Primary standards protect public health by limiting the levels of contaminants in drinking water. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants. Select the appropriate reference . One clo = 5.55 kcal/m2/hr of heat exchange by radiation and convention for each degree C difference in temp between the skin and the adjusted dry bulb temp. Essential for preparing for and taking the Environmental PE, Reviewed in the United States on April 14, 2018. A generalization of Le Chatelier's rule is n / _Ci/LFLi i $ 1 i=1 where Ci is the volume percent of fuel gas, i, in the fuel/air mixture, and LFLi is the volume percent of fuel gas, i, at its lower flammable limit in air alone. There will be bumps along the way. 13991413, 1994. No printed copies of the handbook will be allowed in the exam room. If 50% D 100%, hearing conservation program required. 2018 NCEES 138 Chapter 5: Environmental Health and Safety Expansions and Contractions Industrial Ventilation: A Manual of Recommended Practice for Design, 28th ed., Cincinnati: American Conference of Governmental Industrial Hygienists, 2013, p. 9-60. Michael R. Lindeburg, PE, is one of the best-known authors of engineering textbooks and references. : Wiley, 1980 with permission of Bober and Kenyon. ", Just wanted to let you know, I received results for PE Exam todayPASS!! Copyright 2018 by NCEES. Confined spaces include, but are not limited to, underground vaults, tanks, storage bins, manholes, pits, silos, process vessels, and pipelines. Dimension of Heater, L Large horizontal flat heater 0.149 Width or diameter Small horizontal flat heater1 18.9 K1 Width or diameter Radius Large horizontal cyclinder 0.12 Small horizontal cyclinder 0.12 L*0.25 Radius Radius 0.11 Large sphere 0.227 L*0.5 Radius Small sphere Heater Geometry 1K 1 = /[g(l Ccr Range of L* L* > 27 9 < L* < 20 L* > 1.2 0.15 < L* < 1.2 L* > 4.26 0.15 < L* < 4.26 v)Aheater] Minimum Heat Flux Minimum heat flux, which occurs at the Leidenfrost point, represents the lower limit for the heat flux in the film boiling regime. 4No more than 5.0% samples total coliform-positive (TC-positive) in a month. The rate-of-return on an investment is the interest rate that makes the benefits and costs equal. The following gases are often present in confined spaces: 2018 NCEES 113 Chapter 5: Environmental Health and Safety Ammonia irritating at 50 ppm and deadly above 1,000 ppm; sharp, cutting odor Hydrogen sulfide irritating at 10 ppm and deadly at 500 ppm; accumulates at lower levels and in corners where circulation is minimal; rotten egg odor Methane explosive at levels above 50,000 ppm, lighter than air, odorless Carbon dioxide heavier than air, accumulates at lower levels and in corners where circulation is minimal, displaces air, leading to asphyxiation Electrical Safety Current Level (Milliamperes) Probable Effect on Human Body 1 mA Perception level. A flammable liquid is defined by NFPA and USDOT as a liquid with a flash point below 100F (38C). 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. Bond yield equals the computed interest rate of the bond value when compared with the bond cost. New York: Wiley, 1982, p. 232. Beginning in April 2019, the exam will be computer-based and administered year-round at NCEES-approved Pearson VUE test centers. 1 review. Requests for permissions should be addressed in writing to [emailprotected] PO Box 1686 Clemson, SC 29633 800-250-3196 www.ncees.org Fourth post January 2020 PREFACE About the Handbook The Principles and Practice of Engineering (PE) Environmental exam is computer-based, and the PE Environmental Reference Handbook is the only resource material you can use during the exam. Continue Reading. Learning Hub: PE Environmental - 6 Months Access. Flammability is further defined with lower and upper limits: LFL = lower flammability limit (volume % in air) UFL = upper flammability limit (volume % in air) A vapor-air mixture will only ignite and burn over the range of concentrations between LFL and UFL. Find the right PE Reference Handbook for your respective PE Exam and click on the link to start the download. Comparative Acutely Lethal Doses Actual Ranking No. The exam includes 80 questions. Heavy work: 350500 kcal/hour 2018 NCEES 133 Chapter 5: Environmental Health and Safety Convective 0.6 C = 0.65 Vair (tair 95) C = convective heat load (BTU/hour) V = air velocity (ft/minute) tair = dry bulb temperature (F) Radiant R = 15 ( tw 95) R = radiant heat load (BTU/hour) tw = mean radiant temperature (F) HSI Values 1030 moderate 4060 severe 7090 very severe Body Heat Storage, S S = Ereq Emax (BTU/hr) Ventilation Fan Characteristics Typical Backward Curved Fans DPQ Wo = h f P POWER Wo = fan power P = pressure rise f f = fan efficiency CONSTANT N, D, FLOW RATE, Q Air Horsepower (ahp) Assuming 100% efficiency, air horsepower (ahp) is the power required to move a given air volume against a given pressure. The number of different combinations of n distinct objects taken r at a time is P ^ n, r h n! Pe . His books and courses have influenced millions of engineers around the world. Further, the body must also react with internal forces at all points between the hand and the foot. My review manuals are the best because I give the customer everything they need. Download a free copy of the reference handbook for your exam here. The live instructor feedback is valuable. 2018 NCEES 125 FEL Chapter 5: Environmental Health and Safety Exposure Residential Exposure Equations for Various Pathways Ingestion in drinking water CDI = (CW)(IR)(EF)(ED) (BW)(AT) Ingestion while swimming CDI = (CW)(CR)(ET)(EF)(ED) (BW)(AT) Dermal contact with water AD = (CW)(SA)(PC)(ET)(EF)(ED)(CF) (BW)(AT) Ingestion of chemicals in soil CDI = (CS)(IR)(CF)(FI)(EF)(ED) (BW)(AT) where ABS = absorption factor for soil contaminant (unitless) AD = absorbed dose (mg/[kgday]) AF = soil-to-skin adherence factor (mg/cm2) AT = averaging time (days) BW = body weight (kg) CA = contaminant concentration in air (mg/m3) CDI = chronic daily intake (mg/[kgday]) CF = volumetric conversion factor for water = 1 L/1,000 cm3 = conversion factor for soil = 106 kg/mg Dermal contact with soil CR = contact rate (L/hr) AD = (CS)(CF)(SA)(AF)(ABS)(EF)(ED) (BW)(AT) CS = chemical concentration in soil (mg/kg) CW = chemical concentration in water (mg/L) Inhalation of airborne (vapor phase) chemicals ED = exposure duration (years) CDI = (CA)(IR)(ET)(EF)(ED) (BW)(AT) EF Ingestion of contaminated fruits, vegetables, fish and shellfish FI = fraction ingested (unitless) IR = ingestion rate (L/day or mg soil/day or kg/meal) CDI = (CF)(IR)(FI)(EF)(ED) (BW)(AT) BW LRF CW = CSF(IR + FI BCF) = exposure frequency (days/yr or events/year) ET = exposure time (hr/day or hr/event) = inhalation rate (m3/hr) PC = chemical-specific dermal permeability constant (cm/hr) SA = skin surface area available for contact (cm2) LRF = excess risk factor (unitless) CSF = cancer slope factor [mg/(kgday)]1 BCF = bioconcentration factor (L/kg) Office of Emergency and Remedial Response, EPA/540/1-89/002: Risk Assessment Guidance for Superfund, vol. He has spent thousands of hours teaching engineering to students and practicing engineers. As you can see in the screenshot below, I found information on bending moment super fast by searching for it. reference handbook pdf 2/39 environmental activism a reference handbook ebook [MOBI] Environmental Activism: A Reference Handbook When somebody should go to the ebook stores, search establishment by shop, shelf by shelf, it is in fact problematic. Tips from the pound-mass ( lbm ) liquid by buoyancy forces your respective PE reference Handbook [ 2.0.! Prior permission of John Wiley & Sons, Inc. for pipes in parallel, the must! Your correction using our chat feature on NCEES.org minus the smallest sample value the Society. Begin and end locally, and discussions were all great for preparation., the Central limit Theorem that! Services directly in your mind, outlet weirs or perforated launders not good Flex Fingers 90 Degrees FAIR v 30! 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