A water has a temperature of 10^o C and pH = 8. What should be the C.t value for 3-log Giardia removal using (a) chlorine, (b) chloramine. Assume a chlorine residual of 1.0 mg/L is required. If the chlorine dosage required to achieve this residual is 1.6 mg/L, what is the chlorine requirement in lbs/d for a 2 mgd water plant.

Select the lightest W14 section to carry an axial compression of P = 100 kips dead load, and 140 kips live load; along with a strong axis bending moment of 125 kip-ft dead load and 325 kip-ft live load. Assume the moment acts along the entire 15 foot length of the member, and the ends are pin-pin connections.

Design a welded compression member composed of double standard channels, placed face to face, using A36 steel. Length of the member is 7.5m and the maximum compressive factor force is 3R KN. Distance between centroid of the channels is to be 300mm. Design the section, end plates and the lacing system K=1.0

TAKE R =2071

1. A vertical curve of 1000 feet is designed to connect a grade of +4% to a grade of -5%.   The PVI is located at station 1500+55 and has a know elevation of 500 feet.   Find the following:

1. The station and elevation of the PVC
2. The station and elevation of the PVT
3. The elevation of points along the vertical curve at 100-feet intervals
4. The location and elevation of the high point on the curve

Compute and tabulate full-station elevations for an unequal-tangent vertical curve to fit the requirements in Problems 2 through 5.

2. A +3.50% grade meets a −2.25% grade at station 60+00 and elevation 1310.00 ft. Length of first curve 600 ft, second curve 400 ft.

Compute and tabulate full-station elevations for an unequal-tangent vertical curve to fit the requirements in Problems 2 through 5.

4. Grades g1 of +5.00% and g2 of -2.00%, meet at the VPI at station 4+300 and elevation 154.960 m. Lengths of curves are 200 and 350 m. (Use 40-m stationing)

1. A new overpass is being designed and will be crossing an existing roadway 200 feet prior to it’s PVI (station 120+00).   The existing roadway has grades of -4% and +5% and a sag vertical curve length of 1000 feet.   The PVC elevation is at 600 feet.   There are a significant number of trucks that use the existing roadway.   Determine the minimum elevation that then new overpass can be at as measured from the bottom of the overpass based on sight distance for trucks.   (FYI, also think about the height of trucks as well.)

Solid sections are more effective than hollow sections against buckling. Select one:

a.True

b.False

1.) Vehicles arrive at an entrance to a recreational park. There is a single gate (at which
all vehicles must stop), where a park attendant distributes a free brochure. The park
opens at 08:00 am, at which time vehicles begin to arrive at a rate of 480 veh/hr. after
20 minutes the arrival flow rate declines at 120 veh/hr, and it continues at that level
for the remainder of the day. If the time required to distribute the brochure is 15
seconds and assuming D/D/1 queue,
a. Determine the maximum length of queue that occurred.
b. How long did it take to dissipate the queue?
c. What is the average delay per vehicle?
Show all necessary solutions and diagram

2.) Consider the entrance to the recreational park described in the previous question.
However, assuming that the average arrival rate is 180 veh/hr and Poisson-distributed
(negative exponential times between arrivals) over the entire period from park opening
time, 08:00 am until closing at dusk. Compute
a. The average length of queue
b. Average waiting time in the queue
c. Average time spent in the system

PLEASE ANSWER ALL QUESTION

What considerations should affect an interior designer’s specification of a radiantly heated floor, ceiling, or wall?

8) WHAT IS ALKALI-SILICA REACTIVITY (ASR)? 9) HOW CAN "ASR" BE AVOIDED?

type please