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PE Civil Water Resources Exam Questions and Answers, Exams of Advanced Education

American Public University System (APUS)Advanced Education

PE Civil Water Resources Exam Questions and Answers

Typology: Exams

2024/2025

Available from 07/14/2025

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PE Civil Water Resources Exam
Questions and Answers
What phase is water pure in? - ANSWER-Vapor
What chemicals create acid rain? - ANSWER-Sulfur Dioxide, Nitrous Oxide
List impurities of natural waters: - ANSWER-Ca, Mg, Na, K, Bicarbonate, Cl, Sulfate,
Nitrate, Lead, Copper, Arsenic, Manganese, Organic Matter
List physical characteristics of water: - ANSWER-Turbidity, Color, Taste, Odor,
Temperature, Solids
Total Solids - ANSWER-dried mass - total mass
Total Volatile Solids - ANSWER-evaporated mass - total mass
Total Fixed Solids - ANSWER-TS - TVS
what cations are present in water? - ANSWER-calcium, magnesium, sodium, potassium
what anions are present in water? - ANSWER-bicarbonate, sulfate, chloride
what is hardness caused by? - ANSWER-calcium & magnesium
1 eq/m3 - ANSWER-50 mg/L
total hardness - ANSWER-Ca + Mg + Fe
carbonate hardness - ANSWER-bicarbonate + carbonate
noncarbonate hardness - ANSWER-total hardness - carbonate hardness
sieve analysis - ANSWER-grain size distribution for coarse grained soils larger than
0.075 mm
hydrometer analysis - ANSWER-grain size distribution of fine-grained spils smaller than
0.075 mm
coefficient of uniformity - ANSWER-defines the slope of the curve
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PE Civil Water Resources Exam

Questions and Answers

What phase is water pure in? - ANSWER-Vapor What chemicals create acid rain? - ANSWER-Sulfur Dioxide, Nitrous Oxide List impurities of natural waters: - ANSWER-Ca, Mg, Na, K, Bicarbonate, Cl, Sulfate, Nitrate, Lead, Copper, Arsenic, Manganese, Organic Matter List physical characteristics of water: - ANSWER-Turbidity, Color, Taste, Odor, Temperature, Solids Total Solids - ANSWER-dried mass - total mass Total Volatile Solids - ANSWER-evaporated mass - total mass Total Fixed Solids - ANSWER-TS - TVS what cations are present in water? - ANSWER-calcium, magnesium, sodium, potassium what anions are present in water? - ANSWER-bicarbonate, sulfate, chloride what is hardness caused by? - ANSWER-calcium & magnesium 1 eq/m3 - ANSWER-50 mg/L total hardness - ANSWER-Ca + Mg + Fe carbonate hardness - ANSWER-bicarbonate + carbonate noncarbonate hardness - ANSWER-total hardness - carbonate hardness sieve analysis - ANSWER-grain size distribution for coarse grained soils larger than 0.075 mm hydrometer analysis - ANSWER-grain size distribution of fine-grained spils smaller than 0.075 mm coefficient of uniformity - ANSWER-defines the slope of the curve

coefficient of curvature - ANSWER-defines the continuity of a curve mean particle size - ANSWER-defines the average particle diameter to 50% passing from the curve effective particle size - ANSWER-defines the average particle diameter to 10% passing the curve course - ANSWER-sand & gravel fine - ANSWER-silt & clay what is effective grain size - ANSWER-diameter of the particles in a granular sample, where 10% of the grains are smaller what sieve number for effective grain size? - ANSWER- what table do you look up for sieve analysis? - ANSWER-gradation tests atterberg limits - ANSWER-find the plasticity of fine-grained soils unified soil classification system (USCS) - ANSWER-international classification system AASHTO - ANSWER-US classification system cohesionless soil - ANSWER-sands and gravels cohesive soil - ANSWER-fine-grained soil gravel - ANSWER-sieve no. 4 sand - ANSWER-sieve no. clean water act - ANSWER-regulating discharges of pollutants into the US waters safe drinking water act - ANSWER-protect the quality of drinking water what should you do to neutralize aluminum? - ANSWER-add lime determine the overflow rate - ANSWER-stoke's law Waste Factor - ANSWER-add material to supplement bare quantity of a project to account for loss of material

Effect of frost - ANSWER-moisture content will be exaggerated Effect of lime treatment - ANSWER-Falsely high water content Nuclear Density Test - ANSWER-Measurements of wet and dry density, water content of soil relative compaction - ANSWER-ratio of field site dry unit weight to maximum laboratory dry unit weight what key word should you search when calculating vertical stress? - ANSWER-elastic method total vertical stress - ANSWER-sum of dry unit weight multiplied by soil thickness void ratio - ANSWER-e standard penetration test (SPT) - ANSWER-highly disturbed samples not suitable for shear strength testing, finds density Block Sampling - ANSWER-determine physical properties of soil Shelby Tube - ANSWER-collecting soils that are sensitive to sampling Vane Shear - ANSWER-finding shear strength of soil Find SPT N-value using figure - ANSWER-sum of 2 and 3 increment Will dry density be lower or higher for a frozen sample? - ANSWER-lower Will moisture content be lower or higher for a frozen sample? - ANSWER-higher find vertical stress - ANSWER-influence factor bearing pressure at base of footing formula - ANSWER-pressure divided by area vertical stress of continuous footing - ANSWER-boussinesq elasticity theory - ANSWER-how stress, strain, and displacement are distributed under external forces key word when expected to calculate heave - ANSWER-overconsolated soils coefficient of consolidation - ANSWER-depends on thickness and duration of layer

rate of consolidation - ANSWER-time rate of settlement unit weight of concrete - ANSWER-150 pcf batched concrete ingredients - ANSWER-cement, water, sand, stone concrete performs well in what? - ANSWER-compression steel performs well in what? - ANSWER-tension type 1 concrete - ANSWER-high early concrete what is high early concrete? - ANSWER-hardens faster what is cementious materials? - ANSWER-type 1, fly ash free float can be used without affecting - ANSWER-successor total float can be used without affecting - ANSWER-project 3 different soil classifications - ANSWER-bank, loose, compacted swell - ANSWER-increase in soil volume shrinkage - ANSWER-decrease in soil volume benchmark - ANSWER-permanent point of a known location backsight - ANSWER-elevation difference using a leveling rod to a known point foresight - ANSWER-elevation difference using a leveling rod to an unknown point height of instrument - ANSWER-elevation of line of sight equipment erosion control - ANSWER-prevent movement of earth material sediment control - ANSWER-prevent discharge type A soil - ANSWER-cohesive, highest strength what key word should you look up when you see stagnation or dynamic pressure? - ANSWER-pitot tube