If the period of incubation is 10 days at 20°C in the relative stability test on sewage, calculate the percentage of relative stability.
Q: Draw the shear and moment diagram of the beam shown using area method. Identify the degree of the cu...
A:
Q: For question 3.5, the vertical deflection of joint B is approximately equal to 0.0942m 0.1246m 0.069...
A:
Q: Calculate the axial force on members a, b, and c for the truss system shown. Indicate whether the me...
A:
Q: A simply supported prestressed beam of size 250 mm x 500 mm having span 8 m is pretensioned by a for...
A:
Q: ne optimistic time (0), most likely time (M) and pessimistic time (P) (in days) of the activities in...
A: To find project expected completion time
Q: A rectangular beam of size 250 mm x 400 mm is reinforced with 4-20 mm bars of Fe415 grade. Effective...
A:
Q: A river model is constructed to a horizontal scale of 1: 1000 and vertical scale of 1: 100. If the m...
A:
Q: 1000 lb 500 lb/ft 3800 lb/ft B E D. 2 ft 2 ft 2 ft 6 ft Shear Equation Moment Equation Segment AB Se...
A:
Q: backwashing rate if
A: Environmental engineering:
Q: 10 kN/m B A 2 m 4 m C Determine the horizontal and vertical component of raction at the pins A,B.C
A:
Q: Determine the horizontal and vertical component of raction at the pins A,B.C
A:
Q: One litre of sewage, when allowed to settle for 30 minutes give a sludge volume of 64 cm3. If the dr...
A:
Q: The arched beam in the following figure carres the concentrated vertical forces shown. Determine for...
A: As given in the question ,about the arch beam For calculation of support reaction , Equilibrium cond...
Q: 3. Solve the a) slope at C and b) deflection at B using either AMM or DIM. Use of direct formulas no...
A:
Q: Classify each soil according to ASSHTO classification system. SOIL A SOIL B Description Percent fine...
A:
Q: 10 kN /m A 2 m 4 m Determine the horizontal and vertical component of raction at the pins A,B.C
A:
Q: dy 6. yz = 1, when x = 0, y = 4 + %3D dx
A:
Q: Estimate the settlement of the center of the tank, shown in the sketch, due to consolidation of the ...
A: The given figure is shown below:
Q: Draw the shear and moment diagram of the following beams:
A: Finding support reaction : Applying equilibrium condition Taking moment at Point C ∑MC=0 RAY×8-8×5×3...
Q: 10 kN /m 2 m 4 m 450 Determine the horizontal and vertical component of raction at the pins A,B.C
A: Determine the horizontal and vertical component of raction at the pins A,B,C
Q: A prestressed concrete beam 100 mm x 300 mm in cross-section is prestressed with a straight cable at...
A:
Q: If pipe design diameter is equal 255 mm, Q =5500 m3/day, bed slope of 0.015 and n=0.015, then Qd/Qf ...
A: Given data, Diameter of the pipe = 255mm = 0.255m Design disharge = Qd= 5500m³/day . Bed slope= S0...
Q: nent area is 300 prresponding 4
A: given:
Q: 1.A reinforced concrete beam has a width of 300mm and an éffective depth to tension bars of 600mm. C...
A: We have to determine the tension steel area if the beam is to resist an ultimate moment of 650 KN.m ...
Q: Compute the maximum combined loads USING THE RECOMMENDED ASD EXPRESSIONS FROM THE AISC. D = 900 lb L...
A: To compute the maximum combined load according to Allowable Strength Design (ASD) expressions from t...
Q: For this soil, LL=23 and Pl=19, classify the soil by using a. AASHTO b. USCS c. Give group name and ...
A:
Q: What is the type of this truss
A: Solution: There are different types of trusses used in the construction field like Howe Trusses Fli...
Q: Which type of formwork uses pans as forms? O Waffle slab formwork O Wafer slab formwork O Falsework ...
A:
Q: Determine the principal stress in the beam at point A.
A: Determination of Principle Stress of At point ####
Q: 2. If the cons mponent of
A:
Q: A 5 cmx12 cmx6 m wooden plank (S.G.wood = 0.70) is required to stand vertically in water. To reduce ...
A: We have to determine the value of draft of the wooden plank and metacentric height of the whole syst...
Q: Problem 4 Two parallel tangents have directions of due east and are 250 m. apart, are connected by a...
A:
Q: Respond to the following discussion questions: • What can you say about the controversial Manila Ba...
A: Manila Baywalk Dolomite Beach, normally known as Dolomite Beach, is a fake ocean side along Manila B...
Q: What is the value of vertical reaction at A for the frame shown in figure below? A 5 m - 10 kN/m
A:
Q: Using Area moment method: A simply supported beam with length I is loaded with a uniformly distribut...
A:
Q: c) Is the vertical velocity below the sea surface, say at 50m, upward or downward? Explain your answ...
A: INTRODUCTION: Velocity pattern of flow is different in the sea water beneath the sea surface. There ...
Q: A project is expected to take 15 months along the critical path having a standard deviation of 3 mon...
A:
Q: 120 kN/m A В 80 kN/m 5 m - 3 m For the beam shown in the figure, determine the magnitude of the maxi...
A:
Q: A 100 mg of HNO, (strong acid) is added to water, bringing the final volume to 1.0 liter. Consider t...
A: Given data-100 mg of HNO3Final volume=1 literAtomic weights of H, N & O = 1 g/mol, 14 g/mol, 16 ...
Q: If it cost $154,000.00 to build a 1600 FT2 and you are building a similar house that is 2000 ft2. Wh...
A: 1) Calculate the number of studs are required for the exterior wall on the main floor , The number ...
Q: A pipe conveys water with velocity 360 m/min and pressure gauge shows 5 bar pressure under which the...
A:
Q: What is an actual stud length for an 8 foot wall?
A: what is an actual stud length for an 8 foot wall answer: 92 5/8"
Q: 60 lb/ft 300 lb · ft B A 9 ft
A:
Q: For the beam shown in the figure, A C - 6m. Use: w = 355 N/m and d= 2.6 m. Find the Shear force at p...
A:
Q: Maximum strain in concrete taken for design is 0.0040 while strain in deformed bar is calculated wit...
A:
Q: Compute the maximum combined loads USING THE RECOMMENDED ASD EXPRESSIONS FROM THE AISC. D = 100 psf ...
A: Given Loads- D=100 psfL=70 psfR=12 psfLr=20 psfS=30 psf
Q: termine the shea g yielding and ne
A:
Q: An ascending grade of 4.84% meets a descending grade of -5.71% which serves as tangents for a parabo...
A:
Q: A roof truss and the detail of the connection at joint B are shown in the figure. Angle sections wit...
A: For the given roof truss:
Q: Using Three-Moment Equation, determine the Reactions and defiection at point B. E-29,000 ksi and l-3...
A:
Step by step
Solved in 2 steps with 2 images
- How many gallons of 12-percent sodium hypochlorite solution are needed to disinfect a reservoir 20 feet in diameter and 6 feet deep? An initial chlorine dose of 80 milligrams per liter (mg/L) is expected to maintain a chlorine residual of over 50 mg during the 24-hour disinfection period.Answer and show complete solution. Pls don't rejectA factory discharges waste water to a nearby river. The concentration of dissolved oxygen (DO) a few meters downstream of the factory’s discharge point was recorded for 10 consecutive days as shown in the table below. The lower the DO, the more “polluted” the river is and as the DO reaches zero, the river becomes unable to sustain marine life. Day DO (milligram/liter) 1 1.8 2 2 3 2.1 4 1.7 5 1.2 6 2.3 7 2.5 8 2.9 9 1.9 10 2.2 Determine the 95% confidence interval for the true mean DO concentration.Answer and show complete solution. Pls don't rejectA factory discharges waste water to a nearby river. The concentration of dissolved oxygen (DO) a few meters downstream of the factory’s discharge point was recorded for 10 consecutive days as shown in the table below. The lower the DO, the more “polluted” the river is and as the DO reaches zero, the river becomes unable to sustain marine life. Day DO (milligram/liter) 1 1.8 2 2 3 2.1 4 1.7 5 1.2 6 2.3 7 2.5 8 2.9 9 1.9 10 2.2 Local environmental regulations prescribe a minimum DO concentration of 2.0 mg/L. Perform a hypothesis test to determine whether the river’s water quality satisfies local regulations at a 5% significance level. (follow the 8step hypothesis test)
- Answer and show complete solution. Pls don't rejectA factory discharges waste water to a nearby river. The concentration of dissolved oxygen (DO) a few meters downstream of the factory’s discharge point was recorded for 10 consecutive days as shown in the table below. The lower the DO, the more “polluted” the river is and as the DO reaches zero, the river becomes unable to sustain marine life. Day DO (milligram/liter) 1 1.8 2 2 3 2.1 4 1.7 5 1.2 6 2.3 7 2.5 8 2.9 9 1.9 10 2.2 a. Local environmental regulations prescribe a minimum DO concentration of 2.0 mg/L. Perform a hypothesis test to determine whether the river’s water quality satisfies local regulations at a 5% significance level. (follow the 8step hypothesis test)b. Assume that the daily DO concentration is normally distributed. Estimate the values of the parameters μ and σ.c. Determine the 95% confidence interval for the true mean DO concentration.Answer and show complete solution. Pls don't rejectA factory discharges waste water to a nearby river. The concentration of dissolved oxygen (DO) a few meters downstream of the factory’s discharge point was recorded for 10 consecutive days as shown in the table below. The lower the DO, the more “polluted” the river is and as the DO reaches zero, the river becomes unable to sustain marine life. Day DO (milligram/liter) 1 1.8 2 2 3 2.1 4 1.7 5 1.2 6 2.3 7 2.5 8 2.9 9 1.9 10 2.2 Assume that the daily DO concentration is normally distributed. Estimate the values of the parameters μ and σ.Determine the exact and approximate alkalinity of a water sample that contains 120.0 mg/L of (CO3)^2- and 75.0 mg/L of (HCO3)^- at a pH of 9.7 at 25 degrees Celcius
- Estimate the reduction in bacteria during the passage of wastewater that initially contains 106organisms per milliliter through three stabilization ponds that are arranged in series. The volumes of the three ponds are 10,000; 20,000; and 6,000 m3, respectively. The flowrate is 1000 m3/d. Assume that steady-state conditions apply, that the ponds are completely mixed due to wind action, that first-order decay kinetics apply, and that the value of the reaction rate constant k is 1.0 d-1. What is the overall conversion for these ponds in series? Instead of having three separate ponds in series what would the conversion be for one equivalent pond of the same total volume?A small town discharges its sewage effluent in a nearby river. The river has an initial background BOD of 23.5 mg/L.The oxygen deficit just upstream from the point of discharge of the sewerage is 4 mg/L. The river is flowing at aspeed of 43 km/day. You have been asked to determine the impact of this town’s sewerage discharge on the rivergiven that the deoxygenation rate coefficient kd is 0.3/day, and the reaeration rate coefficient kr is 0.5/day.a) A sensitive fish species inhabits the river 120 km from the point of discharge. Determine if the impact of theBOD will have led to the minimum DO before or after the location of the fish species.b) Find the minimum DO due to the effluent discharge.c) Discuss the oxygen deficit in relation to the location of the fish species and whether the fish are at risk due tothe discharge upstream.A city of 20,000 people disposes of 1.05 m3/s of treated sewage that still has an ultimate BOD of 28.0 mg/L and 1.8 mg/L DO into a river. Upstream from the outfall, the river has a flow rate of 7.08 m3/s and a velocity of 0.37 m/s. At this point, the ultimate BOD and the DO in the river are 3.6 and 7.6 mg/L, respectively. The saturation value of DO (at the temperature of the river) is 8.5 mg/L. The deoxygenation coefficient is 0.61/day, and the reaeration coefficient is 0.76/day. Assume complete mixing and the velocity in the river is the same upstream and downstream of the outfall. What is the oxygen deficit and the ultimate BOD just downstream from the outfall (just after mixing, before any reaction can occur)?
- Wastewater that has a volumetric flow rate of 0.4 m3 /s and an ultimate BOD of 25.0 mg/L is flowing into a river that has a volumetric flow rate of 4.0 m3 /s and an ultimate BOD of 2.0 mg/L. The dissolved oxygen content for the wastewater and the river is 0.80 mg/L and 8.0 mg/L, respectively. What is the dissolved oxygen concentration just after mixing? If the temperature of the river is 17oC, what is the initial deficit?Two streams, each with a flow rate of 10 m3/s, combine to form a single stream. The first stream has fluoride concentration of 20 mg/L and the second has a fluoride concentration of 50 mg/L.(a) Draw a diagram of the system, showing the control volume.(b) Find the downstream concentration of fluoride, assuming complete mixing and conservation of fluoride.Drinking water from a dam which undergoes conventional treatment has a computed chlorine demand (due to silt, corrosion and bacteria) amounting to 3.5 ppm. Per PNSDW, such drinking water must have a mandatory chlorine residual of 1.0 ppm at source. If production flow is at 500 cu.m./day, calculate the chlorine dosage needed in pounds per day (PPD).