Describe a safety hazard you've encountered in the workplace? How was the hazard corrected? Did anyone get injured? Were you involved in correcting the hazard? What was the final outcome? If it was not corrected, what do you think should have been done?
In: Civil Engineering
Calculate the first three frequencies of axial vibration of a bar fixed at one end.
In: Civil Engineering
I. Solve the homogeneous differential equations with the constant coefficient.
a. ? ′′ + 5? ′ + 6? = 0
b. 4? ′′ − 8? ′ + 3? = 0 ? (0) = 2, ? ′ (0) = ½
II. Solve non-homogeneous differential equations with the indeterminate coefficient method.
a. ?′′ − 3? ′ = 5cos(?)
b. ? ′ ′ + 5? ′ + 2? ′ = 7? 3?
III. Solve non-homogeneous differential equations with the parameter variation method.
a. ? ′′ − 2? ′ + 3? = ? 2? ? 2
b. ? ′′ − ? = 3??(?)
IV. Solve non-homogeneous differential equations by the operator’s method.
a. 3? ′′ + 3? ′ + ? = √?? −?
b. 6? ′′ − 2? ′ + ? = ? 2
In: Civil Engineering
|
Scraper tare (empty) |
72000 kg |
|
|
Average load carried |
31 m3 |
|
|
Density of material, in bank |
1650 kg/ m3 |
|
|
Load factor I |
0.7 |
|
|
Distribution of load to driving wheels (% of gross weight) |
57 % |
|
|
Uphill grade on haul road, loaded |
4 % |
|
|
Traction coefficient, haul road |
0.53 |
|
|
Rolling Resistance Factor, loaded |
0.38 kN/t |
|
|
Average speed, haul |
15 km/hr |
|
|
Haul distance |
1020 m |
|
|
Average speed, return empty |
44 km/hr |
|
|
Return distance (by different route) |
1130 m |
|
|
Efficiency factor (operator and scraper together) |
42 min/hr |
|
|
Fixed time is made up of: |
Spot time |
0.8 min |
|
Load time |
2.9 min |
|
|
Dump time |
1.4 min |
|
a) Calculate the gross vehicle weight (GVW) (kg)
(Answer in kg)
b) Calculate maximum tractive force (kN) on road at driving wheels when loaded
(Answer in kN)
c) Calculate the effective grade % on the haul road.
d) Calculate total resistance (kg) while hauling.
e) Calculate the total cycle time (minutes).
f) Calculate production rate, in Bank m3/hr.
In: Civil Engineering
In: Civil Engineering
1. Solve for the area between x^3 − 6x^2 + 8x − y = 0 and the x − axis.
2. Solve for the area bounded by y^2 + x − 4 = 0 and the y − axis.
3. Solve for the area of the arch of the cycloid x = θ − sinθ, y = 1 − cosθ.
4. Solve for the area bounded by x^2 − 2x − y = 0 and x^2 − 6x + y = 0.
In: Civil Engineering
A developer is going to build a new commercial building in Kowloon Tong. The features of the building are described as follows:
Note: UFA denotes Usable Floor Area
i ) Calculate the total cooling load for a given building.
This part fulfills the requirement of P5
In: Civil Engineering
researchers were interested in the effects of cannibis and ecstacy on abstract thinking.Participants were given a task that required them to solve problems/tasks using abstract thinking.Researchers also included a group of nonusers. Base on the scenario, identify the Idependent variable and the dependent variable. Is the IV a quasi or experimental?. what is the research question.
In: Civil Engineering
What are meant by the following abbreviations in the context of transport appraisal?
(i) BCR
(ii) NPV
Give definitions and describe how they are calculated. Compare their strengths and weaknesses in transport appraisal. Explain which you think is better.
In: Civil Engineering
A beam with a cross-section of 0.3 m x 0.7 m has an effective depth of 0.638 m and a span of 4.30 m. Use the following data below to determine (a) the steel requirement due to flexure, (b) ultimate threshold torsion, and (c) spacing of stirrup due to combined shear and torsion:
Mu = 322 KN-m
Vu = 317 KN
Tu = 42 KN-m
f'c =28 MPa
fyt = 414 MPa
12 mm stirrup diameter
cover of 0.04 m
In: Civil Engineering
Which of the following is not one of techniques for financial appraisals?
The market approach that uses prices and other relevant information generated by market transactions involving identical or comparable assets, liabilities, or a group of assets and liabilities.
The cost approach which reflects the amount that would be required currently to replace the service capacity of an asset.
The income approach that converts future amounts (such as cash flows or income and expenses) to a single current (discounted) amount.
The appraisal approach that uses the result of financial appraisal done by experts.
None of the above.
In: Civil Engineering
Structural Dynamic. Assume and draw 7 story building with using different K Stiffness for column and M mass value for slab to show how the mass M and K stiffness matrix will be looks like for 7 story building For column do use like 2K, 1.5 K. 3 K and slab like 2m, 3m, 1.5 m and to see and learn how to obtain the mass and stiffness matrix for 7 story building in term of K and m only. Provide sketch and equation of Motion for un-damped structure
In: Civil Engineering
Pavement performance is an important factor in pavement design because it provides a framework upon which a judgement on the road is either success or failure, which is associated with the ability of the pavement to carry out the design loading. Based on these statements, briefly discuss a distinction between the two different types of failures.
In: Civil Engineering
The shorter legs of two 6”x 4” x 1⁄2” angles are welded
to a 12”-20.7-lb channel. Determine the moments of
inertia of the combined section with respect to
centroidal axes respectively parallel and
perpendicular to the web of the channel.
In: Civil Engineering
When answering the following questions, explain the relationship to critical infrastructure protection.
Describe five of the 11 transportation infrastructure in terms of risk and protection - roads, railways, walkways, bridges and tunnels, stations, airports, air routes, waterways, ports, cycling infrastructure, and living streets.
In: Civil Engineering