Which statement about ideal flow regimes is false? a. In a PFR, the reaction term is larger compared to a CMFR because the contaminant concentration varies from Cin at the reactor influent to Cout at the reactor effluent b. In a CMFR, the time needed to reach steady-state is less than the detention time c. In a PFR, there is no axial mixing (i.e., no mixing in the direction of flow) d. In a CMFR, a change in the influent concentration will immediately impact the effluent concentration

3. Evaluate the annual lime requirements (kg/y) and residuals production (kg/y) of a drinking water treatment plant that softens and treats Mississippi River water for distribution. The plant capacity is 8 ML/d. Mississippi River water quality follows:
pH = 7.6
Ca2+ = 86 mg/L
Mg2+ = 26 mg/L
HCO3- = 225 mg/L

5- Research about the Internal Revenue Service (IRS) Accounting for Construction Contracts and explain how IRS determines the accounting method that can be used in a project. Discuss concepts such as a Small or Large Contractor.

1. Working with Stairs: Proficiency with laying out stairs and proportioning their treads and risers, even at times under seeming impossible circumstances, is an indispensable skill for the designer of buildings. For this exercise, review pages 288 through 289 (proportioning stairs) of the text for the information you will need.

1. Calculate numbers and dimensions of treads and risers for the following stairs. Show all calculations:

1. Exit stair for a school, total rise 12’ – 8”.

Number of Risers __________

Riser Height _______________

Numbers of treads ___________

Depth of treads ___________

2. Main stair in a single family resident, total rise 8’ – 11 ½”

Number of Risers __________

Riser Height _______________

Numbers of treads ___________

Depth of treads ___________

3. Exterior entrance steps to a courthouse, total rise 4’ – 9”.

Number of Risers __________

Riser Height _______________

Numbers of treads ___________

Depth of treads ___________

A water tunnel is mined through a mudstone rock mass at a depth of 200 m. The rock mass consists of three fracture sets. One set is the bedding planes; these are highly weathered, slightly rough surfaces and are continuous with an orientation of 180/10. The first number is the dip direction which is an azimuth measure from the North. Dip direction is measured 90° clockwise from the strike. The second number is the dip. The second set of fractures in jointing; these joints are slightly weathered, slightly rough, and have an orientation of 185/75. The third set is also jointing; again, the joints are slightly weathered and slightly rough and have an orientation 090/80. The strength of the rock is 55 MPa and the values of RQD and the mean fracture spacing are reported as 60% and 0.4 m respectively. The groundwater condition in a tunnel mined through mudstone at a depth of 200 m is assumed to be damp to wet. Calculated RMR for both water conditions. Use RMR to determine adjusted Rock Mass Class and assess the stability of a 10 m wide excavation mined from east to west. Since the tunnel is being driven from East-West, the azimuth of the tunnel face is 270°. Hint: You need to do determine the adjusted Rock Mass Class for each joint set (3 RMR Values) to determine the CRITICAL classification. Do your best at the sketch relationship between each fracture plane and tunnel face so you can adjust RMR for discontinuity orientation.

what satellite remote sensors can be used for the construction of a transportation hub (rail and road transport infrastructure)?

The structure of the hotel industry

1- Describe the organizational chart of a 68-room, economy class hotel, franchised under a major chain’s logo, which has no food and beverageservice, not even breakfast.
2- Sketch the floor plan of the same hotel described abov

please answer on paper to avoid plagorism

3. A falling head permeability test is conducted on a sample of soil. The standpipe diameter = 5 mm, and the soil sample was cylindrical, 20 cm long by 10 cm in diameter. During the test, the initial head of water in the standpipe was 100 cm, and it dropped to 35 cm in 3 hours. a. Determine the coefficient of permeability, k, of the soil (cm/s). b. What soil type do you think this is?

In paragraphs, What are the measures currently implemented in Australia to encourage BIM adoption?

The accompanying data show spot speeds collected at a section of highway located in a residential area. (i) Using the student’s t test, determine whether there was a statistically significant difference in the average speeds at the 95% confidence level. (ii) Also report for before and after the following: mean speed, standard deviation, 85^th percentile speed and percentage of traffic exceeding the posted speed limit of 30 MPH. (iii) using the data, draw the histogram frequency distribution, cumulative percentage distribution for each set of data and determine: (a) average speed (b) 85^th percentile speed, (c) 15^th percentile speed, (d) mode (e) median and (f) pace[the most common 10 MPH range].

1. Briefly describe mass wasting.

2. How is mass wasting classified and provided names for different types of mass movements.

3. A cubical block with volume of 1 m3 and mass of 10 kg rests on a slope of 10 degree. The coefficient of friction is 0.4. Calculate the shear stress and shear resistance.

4. Why is it important to provide outlets (drainage) for water stored behind the retaining walls?

5. Discuss some methods of preventing slope failures in civil engineering projects. Support your answers with pictures.

What inspections are performed related to the formwork, rebar and concrete placement? For each inspection, indicate: Who performs the inspection?What does each inspection check? What specific requirements need to be satisfied to pass the inspection

The company wishes to store heavier boxes on this overhead shelf which means a reach above the shoulder would be in the danger zone for lifting.

A) How high does the platform (or a step stool) need to be for your worker to reach a box on a 180cm high shelf with hands at shoulder height as shown in the right figure? Explain. State any assumptions you make (e.g., does the worker wear safety shoes?).

B) Per OSHA 1926.1053, how many steps does your step stool need for your worker - including the step (platform) they stand on? Explain. State any assumptions you make.

C) For your worker do you recommend a platform or step stool for this task?

Do your calculations for an above average (84th %) male.

QUESTION 2
2.1. From the information provided below of the nominal engineering constants of a
unidirectional graphite epoxy ply. Where the fibre volume fraction is reduced from
60% to 55%. Estimate the modulus of the reduced fibre volume fraction. (10)
E1
(GPa)
E2
(GPa)
G12
(GPa)
?12
When nominal ?? = 0,6 148 9,65 4,55 0,3
Back calculated ?? = 0,5
Rule of mixtures 136 - - 0,304
Modified rule of mixtures - 9 4,14 -