Air Pollutant Concentrations and Factors Affecting Air Pollution Air inversions greatly affect local air quality because pollution is trapped. Assume an inversion occurs over a 75 m x 50 m surface area and there is no way for the pollutant to escape. There are 100 cars and each one produces 10.5 µg/s of carbon monoxide (CO). Part a [1 points]: What is the concentration (in ppm) after 1 hour if the inversion is at 150. m? Part b [1 points]: What is the concentration (in ppm) after 1 hour if the inversion is at 1,500. m? Part c [1 point]: Is the NAAQS exceeded in either case? The 1-hr concentration for CO should not exceed 35 ppm. Part d [3 points]: Describe three ways (natural or human-caused) that the concentration of CO would decrease.
In: Civil Engineering
Discuss the importance of protecting interior spaces from intrusion of air and moisture.
Items of importance in your discussion include:
In: Civil Engineering
Laboratory compaction test results for a cohesive soil are given in
the following table:
|
Water Content (%) |
Dry Density (pcf) |
|
12.0 |
116.2 |
|
13.6 |
117.6 |
|
14.8 |
117.9 |
|
16.1 |
116.5 |
|
17.2 |
113.6 |
Plot Diagram with labels and sample test labels
Specifications call for a fill dry density of 114 pcf and further require that the fill be compacted at optimum water content for the field compactive effort. For the following field density test results on a fill, explain how you alter the field placement operation:
In: Civil Engineering
Q5: Which type of pile foundation in adopted for the below
conditions:
a. the Depth should be 3 to 5 m
b. Should be clayey soil
Also Describe about that type with neat sketch
Write by microsoft word ( text )
In: Civil Engineering
Q3: Shallow & Deep foundation are the two main types of foundation. Compare how both differs from each other. Suggest which type is mostly suitable for sky scrapers.
Write by microsoft word ( text )
In: Civil Engineering
Q4: What type of cement test is used to compute the amount of water to be added for making the cement paste for Initial setting time? Write the step-by-step guidelines of that cement test.
Write by microsoft word ( text )
In: Civil Engineering
Q1: Justify how young’s modulus of material is considered as important for materials
Write by microsoft word ( text )
In: Civil Engineering
In a quality control test for pavement construction, the engineer cut out a core of the asphalt mix. Laboratory tests were conducted on the core to determine the volumetric properties of the mix. The dry mass of the core is 1200 g, the saturated surface dry mass is 1202.5 g and the submerged mass is 691.9 g. The engineer separated the bitumen from aggregate and found that the dry mass of the aggregate was 1132.8g. The specific gravity of bitumen is 1.05 and the percentage of bitumen absorption is 0.5%. The aggregate bulk specific gravity is 2.76, determine the following:
a) bulk specific gravity of the compacted mix
b) Effective specific Gravity aggregates
c) max theoretical specific gravity of asphalt mix
d) percentage by mass of effective binder content
e) percentage of air voids in the total mix
f) pencetage of voids in the mineral aggregates
In: Civil Engineering
500 mm thick square footing is to be placed at a depth of 0.5 m in a clayey sand where c¢ = 10 kPa, f¢ = 34°, g = 19.0 kN/m3. The column load to be applied on the footing is 2000 kN. What should be the width of the footing?
In: Civil Engineering
Construction Documents Review
26. Define Attention to Details and Negligence in construction projects
27. Explain Bidding Process / Bid Day
28. What is a Construction contract administration / Error and Omission insurance
29.What is a Project file / Project Evaluation / BIM
30. Explain Communication in Construction projects (relationship of GC, owner, etc.)
In: Civil Engineering
31. Explain Construction Law and Ethics
32. Explain Quality Control and Quality Assurance
33. Explain Walk-Thru / Punch list / Retainage / Warranty
34. Explain Claims, Disputes and Conflicts, Negotiation, Mediation, Arbitration
In: Civil Engineering
Construction Documents Review
21. Difference between Insurance and Bond
22. Explain Lien and Lien process
23. Construction cost estimating / Different types / Cost Monitoring / Units of Measurement
24. Construction Contract types / Lump Sum / Cost plus contracts / GMP
25. Construction Scheduling / CPM / Delay / Fast Track / Turn Key / Liquidated Damages
In: Civil Engineering
Construction Documents Review
11. Explain Addendum, Addenda, and Change Order in construction projects.
12. Name and explain three items (required at minimum) in a Change Order.
13. What is the Door Schedule, Window Schedule & Room Finishes?
In: Civil Engineering
Construction Documents Review
17. Definitions; Submittal, Constructability, Vented soffit, Specifier, Lead time, etc.
18. Four levels of certification for Green projects? Three levels of credentials for individuals?
19. Four Insurances required at minimum for Construction Projects?
20. Three Bonds required for Construction projects?
In: Civil Engineering
Construction Documents
1. What is included in a Bid Package for a construction project?
2. Name and explain the three different stages of construction projects development.
3. Name and explain the three different stages of Architectural Design process for construction projects.
4. Name ten (10) different drawings in a set of drawing for a construction project.
5. What is Title Block and what type of information you can find in a Title Block?
In: Civil Engineering