(See Fluids in the News article titled “Modeling parachutes in a water tunnel”.) Flow characteristics for a 35-ft-diameter prototype parachute are to be determined by tests of a 1.0-ft-diameter model parachute in a water tunnel. Some data collected with the model parachute indicate a drag Fm = 22 lb when the water velocity is 4 ft/s.
(a) Find the predictor equation. Assume the drag to be a function of the velocity, V, the fluid density, ρ, and the parachute diameter, D. Note that model variables have subscripts m.

(b) Use the model data to predict the drag on the prototype parachute falling through air at 10 ft/s.

A traffic engineer needs to determine the AADT on a rural primary road that has the volume distribution characteristics shown in the following tables. He collected the following data on a Wednesday during the month of August. What is the estimated AADT of the road using following information (Traffic volume, HEF, DEF, and MEF factors)? (6.5 points)?

A 1150 veh/day

B 5438 veh/day

C 5590 veh/day

D 7250 veh/day

E None of the above

A 4-m-high and 6-m-wide wall consists of a long 18x30 cm2 cross section of horizontal bricks (K=0.72W/mC) separated by 3-cm-thick plaster layer (K=0.22W/mC). There are also 2-cm-thick plaster layers on each side of the wall, and a 2-cm-thick rigid form (K=0.026W/mC) on the inner side of the wall. The indoor and outdoor temperatures are 22C and -4 C, and the combined convection and radiation heat transfer coefficients on the inner and outer walls are 10W/m2C and 20W/m2C, respectively. Determine the rate of heat transfer through the wall

1. What are some advantages and disadvantages of the general contract approach? Assume that the general contact will be awarded on the basis of competitive lump sum bidding.

2. What are the possible options and how a contracting method is selected for a federal-aided highway project?

For a channel with subcritical flow condition, a bridge opening constriction produces a reduction of about 10% of the original channel width due to the structural elements. Therefore, hydraulically speaking, the water is accelerated at the opening and its water depth is lower than the water depth from the upstream bridge. True or False? Explain.

Design a mix for a 3,000 psi concrete to be used in an indoor basement slab. Your gravel is an ASTM C33C #57 stone. Your fine aggregate grades as follows: No. 4 – 3%, No. 8 – 7%, No. 16 – 20%, No. 30 – 25%, No. 50 – 20%, No. 100 – 15%, Pan – 10%.

What is your mix and list out what you can do to make a durable mix that is economically competitive? How would you adjust the workability of the mix?

The clay layer of 6 m thick is located under the gravel ground of 12 m thick. The water table lies 4m below the ground surface. It is because the bag is 0.30 for dry gravel floor, the dry unit volume weight is 16.2 kN / m3, the undrained shear strength for clay floor is 20 kPa, 24o for friction and 17.6 kN / m3 for saturated unit volume. According to doing; Based on the shear strength of the ground in the middle point of the clay layer, calculate the total and effective values of the stress acting on the vertical face of the ground element at the same point.

If 24 students run 24 Casagrande Tests and 24 Thread Rolling Tests, how many different Plasticity Indexes will we most likely see and why?

Paragraph

Chloroform, 0.01mg/kg-day

Acetone,  0.1mg/kg-day

Xylene 2.0 mg/kg-day

Phenol 0.6mg/kg-day

Which of these is the most dangerous?

1. As part of the development of the one district, one factory programme, a catchment of size 100 km2 has been marked for vegetation. In its original condition, the average annual total runoff from the catchment is 1.1 m3/s. The average annual rainfall is 800 mm/a. In an average year, 50% of the rainfall infiltrates and 12.5% of the rainfall reaches the groundwater. Tests have turned out that the average annual evapotranspiration from the unsaturated zone (being the sum of the transpiration and the bare soil evaporation) amounts to 340 mm/a. In all water balance computations over the year, one may assume that the storage effects are small (dS/dt = +0).
a. How much water, in mm/a, reaches the root zone through capillary rise in an average year?
b. How much water, in cm/a, seeps out from the groundwater to the surface water in an average year?
c. How much water, in l/a, evaporates directly from interception in an average year?
d. How much, in m/a, is the total evapotranspiration in the catchment in an average year?
A well field is planned to withdraw 0.16 m3/s from the catchment for drinking water consumption elsewhere. As a result, the groundwater level is expected to go down and capillary rise into the root zone will no longer be possible. The percolation, however is expected to remain the same.
e. What will be the effect of the withdrawal on the different components of the hydrological cycle: the groundwater seepage, the total runoff, the evapotranspiration from the unsaturated zone and the total evapotranspiration? Please quantify in mm/a.

A cantilever bean is 12 feet long and has a uniformly distributed dead load of 600 lbs/ft and a uniformly distributed live load of 1000 lbs/ft. Design the beam for flexure assuming it is continuously braces by a floor/deck system. Use 36 ksi steel.

a) draw Free body Diagram/ shear + moment diagram to find Mu Max

b) Solve for Zx based on Mu Max

c) Select beam from table 9.1

d) Check compactness criteria

e) if compactness works, recalculate Mu Max adding in beam weigh (Dead Load)

f) compare o/ Mn to Mu Max

g) Deflection Check

meeting agenda assignment for an engineering meeting (for english course)

A 16-ft long pin-pin column has to support a dead load of 100 kips and a live load of 280 kips. Using column selection tables from the Steel Manual select columns for the given shapes. All selections should be structurally safe and least weight.

50-ksi W-section (W10, 12, 14 only)

35-ksi pipe (standard, x-strong, xx-strong)

46-ksi rectangular HSS

46-ksi square HSS

42-ksi round HSS

Draw a building management system (BMS) architecture diagram for three air handling units, two boilers, four VAV boxes, two chillers, and two cooling tower fan variable frequency drives

A rural principal arterial is expected to carry an ESAL of 0.188 × 10^6 during the first year of
operation with an expected annual growth of 6% over the 20-year design life. If the subgrade has a
resilient modulus of 15,000 lb/in2, design a suitable pavement consisting of a granular subbase with a
resilient modulus of 13,500 lb/in2, a granular base layer with a resilient modulus of 25,000 lb/in2, and
an asphalt concrete surface with an elastic modulus of 400,000 lb/in2. Assume all mi values = 1 and
the percent of traffic on the design lane is 47%. Assume a reliability level of 95%, the design
serviceability loss is 2.0, and standard deviation of 0.4.