Name the 4 categories of microbiological contaminants and for two of them, give an example microorganism.

Calculate the firewater demand in (m³/min) for a building having 25 floors including basement. Building is constructed with non-combustible construction material and serving total population of 1400. Assume area of each floor as 9800 ft². Using following formulas:                                 [5 Marks]

a). Insurance Services Office Formula

b). Equation for National Board of Fire Underwriters

c). If fire water demand is required for 4 hours calculate the volume of water storage tank in m³ (For Part b only)

Instructions: Find the values of required parameters from class notes or course book.

Also use 1 gallon = 7.8 Liter.

Given an unconfined aquifer with a saturated thickness of 15 m, h0, as shown in Fig. 1. Observation wells are located at the radial distances of 30, 60, and 120 m from the center of pumping well.

Water is pumped at the rate of 0.015 m^3/sec. After pumping 12 hours, the drwdowns are z1=0.60 m at the radius r1= 30 m , z2 = 0.43 m at r2 = 60 m and z3= 0.26 m at r3 = 120 m.

1. Evaluate the permeability of the aquifer using all three combinations of selecting two observation wells in the computation.

2. How many laboratory permeability tests would be required to achieve the accuracy?

Social and political factors refer to the societal pressures, real or perceived, that influence Electrical Power Distribution, on Corporate initiatives

I am having trouble on figuring out the Corporate initiatives that influence Electrical Power Distribution. Any leads on websites or help you can give would be appreciated.

You are provided a fully saturated clay soil sample with a plasticity index of 21 and a liquid limit of 43. The dry unit weight, γd, of the sample is 1.62 Mg/m3 and the moisture content is 21%.

Calculate the following:

• γsat

• ρs

• e

Double Ring Infiltration Testing and Field Applications

Find 10 reference sources that deals with this topic.

What was MONTESQUIEU’s contribution to theories of government?

What made DENIS DIDEROT’s ENCYCLOPEDIA such a definitive statement of the Enlightenment’s goals?

What influence did CESARE BECCARIA have over legal practices in Europe?

What contributions did ADAM SMITH make to economic theory?

Compare and contrast the architecture styles, materials and elements during the Medieval era, with that of the Renaissance Period.

1. Two reactors, one of them a CMBR and the other a CSTR, are operating side by side in parallel. Each is treating one half of a total flow rate of 800 gal/min containing a substance that enters at a concentration of 80 mg/L and experiences first-order degradation with a k value of 0.1/min.

The reactors have identical volumes of 8000 gal, so they also have equal liquid retention times of 20 min.

(a) What is the concentration of the substance leaving the CMBR?

(b) What is the concentration of the substance leaving the CSTR?

(c) Why are the two concentrations as different as they are?

2. The total flow drops to 400 gal/min, the CMBR is shut down (so all of the flow is going through the CSTR), and the influent concentration of the substance jumps to 120 mg/L.

(a) What will be the new, long-term effluent C from the CSTR?

(b) What will be the effluent concentration 5 minutes after the change?

(c) 20 minutes after the change?

Consider a 10x108 m3 lake fed by a polluted stream having a flow rate of 2.0 m3 /s and pollutant concentration equal to 10.0 mg/L. There is also a sewage outfall that discharges 0.5 m3 /s of wastewater that has a pollutant concentration of 100 mg/L into the lake. The stream and sewage pollutants have a decay rate coefficient of 0.20 day-1 (first order). Under these flow conditions the lake remains the same volume (e.g. a stream enters and exits the lake) and that the lake shallow and in an area which significant wind (i.e. always has white caps). Assume there is no evaporation or other water losses or gains.

a) Which ideal reactor would be best use mathematically model this system? Why? (1 sentence)

b) What is the steady-state concentration of pollutant in the lake under current conditions?

c) If one day the wastewater plant treatment process were to be improved, releasing a pollutant concentration of 25 mg/L at the 0.5 m3 /s (which is assumed to be become immediately completely mixed in the lake), how long would it take for the system to most nearly reach steady-state.

list construction criteria for water distribution system. design, construction and operation. from an agency.
please list refrence

hydrology. water resources

ENMA 480: ETHICS AND PHILOSOPHY FOR ENGINEERING APPLICATIONS

Cigarettes   kill   more   than   400,000   Americans   each   year,   which   is   more   than   the   combined   deaths   caused  
by   alcohol   and   drug   abuse,   car   accidents,   homicide,   suicide,   and   acquired   immunodeficiency   syndrome  
(AIDS).   Cigarette   companies   do   much   good   by   providing   jobs   (Philip   Morris   employs   more   than   150,000  
people   worldwide),   through   taxes   (more   than   $4   billion   paid   by   Philip   Morris   in   a   typical   year),   and  
through   philanthropy.   Most   new   users   of   cigarettes   in   the   United   States   are   teenagers   (younger   than  
eighteen   years   of   age).   There   is   disagreement   over   just   how   addictive   cigarettes   are,   but   adults   have  
some   choice   in   deciding   whether   to   continue   using   cigarettes,   and   they   may   choose   to   continue   using   for  
reasons   beyond   the   addictive   potential   of   nicotine.  
Can   utilitarianism   provide   a   moral   justification   for   engineers   who   work   for   tobacco   companies,   for  
example,   in   designing   cigarette- making   machinery?   In   your   answer   take   account   of   the   following   facts  
(and   others   you   may   be   aware   of).
(Roger   Roseblatt,   “How   Do   Tobacco   Executives   Live   with   Themselves?”   New   York   Times   Magazine,   March   20,   1994,   34–41,   55)