Explain Storm water Management

1. a) What is the aim of intergrinding some gypsum rock with clinker during the production of portland cement? b) What are the effects of adding insufficient amount of gypsum and too much gypsum on the cement?

If you are an Activity or Sub-Activity Manager, what should you look for in designs? State which Activity or Sub-Activity you manage and any relevant examples of concerns that you have addressed.

Why are doors, windows and such openings not considered while calculating seismic weight of the structure?

Assume you have been designated as a building commissioner for a high-performance green building. Explain what steps you would take to commission the building (a minimum of five steps). Explain the benefits of completing each step and how you would go about completing each step.

2 a) Draw a neat sketch of Hauled Container System.

b) Municipal solid waste from the Al-Khuwair area is to be collected in hauled containers in conjunction with stationary compactors. It is estimated that the average time to drive from garage to the first container location (t1) and from the last container F/QAP/021/001 2 location to the garage (t2) each day will be 20 min and 25 min respectively. If the average time required to drive between the containers is 3 min and the one-way distance to the Al Amerat is 20 km (speed limit: 72 km/h). Determine the number of containers that can be emptied per day, based on an 8-h workday. Assume the offroute factor W is equal to 0.12.

1. Explain terms below

1. DNPAO

2. Anammox

3. EBPR

4. A2O

Derive the empirical equations of a) Hazen-Williams and b) Mannings with respect to discharge, Q. Assume that the pipe is circular and flow is flowing full.

The dimension of the soil sample of a cylindrical shape is provided in Figure 1. In its natural moist state, the soil sample has the total weight of 1350 g before the water content determination. The specific gravity, Gs of the soil is given as 2.72. The values obtained for the determination of water content are: The mass of moist soil sample + mass of empty can = 1.415 kg; the mass of fully dry soil sample + mass of empty can = 1.123 kg; the mass of partially dry soil sample + mass of empty can = 1.227 kg; the mass of empty can = 0.065 kg. h= 15.8 cm d =8.8 cm

i. Natural moist (bulk) density, ρb (3%)

ii. The water content, w

iii. Dry density of the soil, ρd (2%). Kindly note: Use the formula relationship for bulk and dry density

iv. Unit mass of solids, ρs (2%)

v. The degree of Saturation (2%)

vi. Find the volume of air in the soil (2%)

vii. The void ratio, e and porosity, n (4%)

viii. How much water in grams is required to make the soil fully saturated, if it were partially saturated? (3%)

ix. Draw the phase diagram of the soil sample and indicate if the soil is fully saturated, partially saturated or dry? Please note that you must show all the mass-volume relationship with their values provided for (5%

Sectional bending moment due to counting load M_U = 525 kN
Find the amount of reinforcement required. The cover thickness is 40mm, and the stirrup rebar is D10.
Design. Compressed reinforcing bars do not have to be yielded, and the size of the section can only be increased if design is not possible under the given conditions.

b = 330 mm, h = 600 mm, f ck = 40 MPa, f y = 500 MPa, using tensile and compressed rebar D16

How Does the Ratio of Sand to Cement Affect the Strength of Concrete? Explain in details

The speeds of 80 vehicles were collected from a roadway section to estimate the mean speed. The margin of error for this sample mean was reported as 4 km/h at the confidence level of 90%. What is the sample size required to reduce this margin of error to 2 km/h (i.e., to ensure that the true mean is within ±2km/h of the sample mean 90% of the time)?

1.Answer the following questions.

a)A solid shaft transmits 75kW power at 200rpm.Determine the diameter of the shaft if the twist in the shaft is not exceeded 1⁰ in 1m length of the shaft, and shear stress is limited to 50N/mm^2.

Take rigidity modulus, G=100kN/mm^2

b)A hollow shaft with a diameter ratio of 0.7(internal outside) is required to transmit 500kW at 300 rpm with a uniform twisting moment. Allowable shear stress in the material is 70N/mm^2 and twist in a length of 2.5m is not to exceed 1⁰.Determine the maximum external diameter of the shaft satisfying these conditions. Take modulus of rigidity G= 80KN/mm^2