Compare the moment area method with other methods of calculating the deflection of beams

Workers in a 1000 m³ processing room in a plastics factory are exposed to vinyl chloride (C₂H₃Cl) gas, which is emitted when the plastic pellets are heated to make the final products.

a. If the source strength of C₂H₃Cl is 80 mg/h and the air change rate in the room is 0.21/h, what is the steady state concentration of C₂H₃Cl (in mg/m³ and in ppmv) in the room at 25⁰C and 1 atm? Assume that C₂H₃Cl is conservative and that the concentration of the gas in the ambient air is zero.

b. What is the concentration (in ppmv) in the same room 6 hours after all the machines are turned off at the end of the day?

Design a concrete mix for reinforced concrete beams of a structure. The structure is located in a locality wherein water has excess of chlorides in it. Required average compressive strength of concrete has been determined to be 4700 psi. Beams have cross-section of 9 in. x 21 in. reinforced with 4 # 6 bars. Reinforcement has a concrete cover of 1.25 in. and there is a clear space of 1.0 in. between form surface and steel bars. Fine aggregate has bulk specific gravity (SSD) of 2.63; absorption capacity of 1.25%; surface moisture of 3.0% and a fineness modulus of 2.75. Coarse aggregate has bulk specific gravity (SSD) of 2.70; absorption capacity of 2.50 %; surface moisture of 1.75% based on SSD state and dry-rodded unit weight of 110 lb/ft3. Design concrete mix following the step-by-step method of ACI 211.1-91 for the subject beams and tabulate the quantities of ingredient materials in lb/yd3, lb/ft3 and 1.5 lb/ft3. Provide reference of relevant ACI Tables in each step.

Find the diameter of a pipe of length ‘X’ when the rate of flow of water through the pipe is ‘Q’ and the head lost due to friction is ‘4X’. Take the value of C = 1 in Chezy’s formula. Illustrate the resut of diameter of pipe and also conclude the discharge value for varying cross section of pipe, and the relationship between diameter of pipe and pressure of flow.

Find the critical depth, critical slope and Froude Number at section
y=0.9 m in a 0.55 m wide, m=1 trapezoidal channel carrying water at the
rate of 0.95 m3/s. n=0.016.

24' Steel beam has deflection L/300. Compression flange has lateral bracing. Beam has a uniformly distributed live load of 800 pounds per linear foot. Dead load is 50 PLF.Select best A992 W shape for the beam.   

Calcium, magnesium, iron, manganese, nitrate, nitrite, chloride, and sodium are some
of the most abundant ions present in water samples. Two methods (predominant polyvalent cations
and all polyvalent cations) have been used to measure Total Hardness (TH). Discuss when
a) TH measured using the predominant polyvalent cations = TH measured using all polyvalent cations
b) TH measured using the predominant polyvalent cations > TH measured using all polyvalent cations
c) TH measured using the predominant polyvalent cations < TH measured using all polyvalent cations

I am looking for a proposed title for a project concerning sediments in water .... Are there any proposals ???

] Landfill A has been used for 25 yr, while landill B has been used for 10 yr. Landfill A has ____________ pH, ____________ COD, and ________ nitrate than B

Why do we need light weight blocks and define its benefits based on its various properties it possess?

A rectangular detention basin will be connected to outlet of the above drainage system to reduce the peak flow rate to 5m³/s. Determine the dimensions of the basin if the length of the basin is 3 times of the width. An orifice will be used as the outlet of the basin and the depth of water above the center of the orifice should be less than 2m. What is the size of the orifice?

Describe briefly the principle of the Rational method and the limitation of this method for runoff estimation. A sub-catchment of area 0.1km² is built on gently sloping land. The average slope of the land is 0.001. The length of the longest natural flow path L is 276.3m. The flow time t_f in the drainage system is 3min. Determine the 50yr design discharge for the subdivision using the rational method, given that the average runoff coefficient of the subdivision is C=0.7.

The above sub-catchment is drained by a pipe system which is also used to drain the second sub-catchment. The second sub-catchment is of area 0.2km², average slope 0.002, L=300m, and t_f=3min, C=0.5. If the pipe system is designed for the 50-yr rainfall event, what is the appropriate duration to be used? Explain briefly. Hence determine the 50yr design discharge of the drainage system.

The 50-yr rainfall intensity i can be calculated from i(mm/hr)=a/(td+b)^c, where a=687, b=4.2, c=0.42, t_d(min)=duration.

Q: List the benefits of CPM scheduling in the construction project from the project engineer’s
perspective.

Q: As an engineer who prepares the tender documents, discuss the procedures and Oman tender
regulations to be followed to submit a successful tender bid.