代做ENGRCEE 81B – Civil Engineering Practicum II, Winter 2024 MIDTERM调试数据库编程

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Department of Civil and Environmental Engineering

ENGRCEE 81B – Civil Engineering Practicum II, Winter 2024

MIDTERM

For each problem below, write down your calculationsand box your final answer.

1. (12 points) The length of course AB is 100 ft.

Calculate the following for course AB:

a) Bearing

b) Azimuth

c) Latitude

d) Departure

2. (6 points) Determine the elevation difference between points A and B:

Vertical angel: Θ = 3o33’ 33’’

Slope distance: L = 300ft

Rod reading: RR = 4.5ft

Height of instrument: HI = 5ft

Elevation at A: 500 ft

3. (9 points) Calculate the elevation at point C

hA = 4.5 ft

hFSB = 2.5 ft

hBSB = 5.5 ft

hc = 2 ft

Elevation at A: 1000 ft

4. (16 points) A field investigation was performed and yielded the following information:

A1 = 500 ft2

A2 = 1500 ft2

Am = 1000 ft2

The table below shows the cost per cubic yard

(CY) of earth cut and filled for the proposed project.

a) Calculate the total cut volume (in cubic yards) in this project. Specify the

method used to calculate the cut volume. (12 points)

b) Estimate the cost of the earthwork based on the total cut volume. (4 points)

5. (22 points) The interior angles in the closed traverse below were measured as follows:

θ1 = 23o4'10" , θ2 = 115o43'31" , and θ3 = 41o11'52" .

a) Compute the adjusted interior angles in this traverse. (18 points)

b) Name two methods for computing the area of a closed traverse. You do not need to calculate the area. (4 points)

6. (20 points) In the following diagram, the length of AB is 300 ft.

a) Compute the latitude of AB. (10 points)

b) Compute the departure of AB. (10 points)

7. (15 points) The course AB has following latitude and departure:

Lat: - 170.5 ft

Dep: - 185.2 ft

a) Compute the bearing of AB. (5 points)

b) Compute the azimuth of AB. (5 points)

c) Compute the length of AB. (5 points)