cameroon gce advanced level 2025 building construction survey and soils mechanics 2

Based on the documents provided, here are the questions:

From the Reinforced Concrete & Strength of Materials Documents

Part One: Reinforced Concrete

• Work to be done:
  • i. Evaluate the dead load (G) and the live load (Q) in linear meter (kN/m) for beam (2-2).
  • ii. Calculate the load Pu and Per at ULS and SLS respectively, in linear meter (kN/m).
  • iii. Calculate the reaction on pillar P5 for Pu = 20kN/m.
  • iv. Deduce the reactions on pillar P4 and P6.
  • v. Considering that P4 = P6 = 31.5 kN/m. Write the equation of T(x) and M(x) and draw their diagrams.
  • vi. Calculate and choose a suitable cross-sectional area of reinforcement, given that; Mu = 50 kN/m.
  • vii. Draw the transversal disposition of the reinforcement in the beam. Given that;
    ϕt​=3ϕ​

    .

Part Two: Strength of Materials

 

• There are no explicit questions in this section, but the task is to analyze the mechanical diagram of a scaffold structure for transporting concrete.

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From the Building Project Document

Question 1

• Work Required:
  • 1-1. Draw the Section A-A to a scale 1:50.
  • 1-2. Draw the front elevation of the building to a scale 1:75.

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From the Engineering & Surveying Documents

Section A: Surveying

Question 1: Bearings, Azimuths and Traverses

 

• 1. Define the following words:
  • 1.1) Bearings
  • 1.2) Azimuths
  • 1.3) Traverses
  • 1.4) Angles
• 2. In a tabulated manner, give two differences between a bearing and an azimuth.
• 3. Differentiate between open and closed traverses.
• 4. The following azimuths are from the north; 329°20′, 180°35′, 48°25′, 170°30′, 145°25′. Express these directions as:
  • 4.1) Azimuths from the south
  • 4.2) Back azimuths
  • 4.3) Bearings.
• 5. The following are adjusted azimuths and measured distances for a closed traverse that start at C and closes at D. Using the table below, calculate:
  • 5.1) The error of closure
  • 5.2) The coordinates of each traverse station.
  • 5.3) Adjusted azimuths and distance for each line.

 

Section B: Levelling

Question 2: Levelling

 

• 1. What do you understand by the word spirit levelling?
• 2. Define the word a level line.
• 3. From the traversing diagram above, what is a change point and how many are found on the diagram.
• 4. What do you understand by reduced level?
• 5. Draw the field note book using the RISE and FALL method. Fill and calculate the reduced levels of the various points of figure 1 above.

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From the Concrete & Soil Mechanics Documents

Section A

 

Question 1

 

• Evaluate:
  • i. The annual cost of depreciation.
  • ii. The annual cost of maintenance.
  • iii. The annual cost of the machine.
  • iv. The daily rent of the machine.
• Calculate:
  • i. The cost of fuel per year.
  • ii. The cost of oil per year.
  • iii. The salary of the operator per year.
  • iv. The total expenditure.
  • v. The hourly expenditure.

Question 2

 

• You are requested to:
  • a) Choose the concrete mixer for this project.
  • b) Determine the radius of the crane.
  • c) Calculate the quantity of concrete produced per hour.
  • d) Calculate the quantity of cast concrete per hour.
  • e) Determine the duration of the project in days.
  • f) Give two ways to reduce the duration of the project.
  • g) Determine the duration of the project if the working day is extended by an hour.

 

Section B: Soil Mechanics

Question 3: Grain size distribution and Soil phases

 

• 1. Draw a clean and well labelled diagram of the three phases of a soil mass.
• 2. What do you understand when a soil is said to be dry?
• 3. For a given soil, w = 25% and the total unit weight is 18.5 kN/m$$^3$$. Determine the void ratio (e) and the degree of saturation
     Sr​

     , assume that

     Gs​

     is 2.70.

• 4. The following table below shows a data set from a sieve analysis.
  • 4.1) Complete the rest of the table using a spreadsheet.
  • 4.2) Plot the grain size distribution curve.
  • 4.3) Determine D10, D30, D60.
  • 4.4) Compute
    Cu​

    and

    Cc​
  • 4.5) Report the percentages of gravel, sand, silt and clay.