PEC EPE Exam Numercial Questions for Construction Materials and Machinery

PEC EPE Exam Numercial Questions for Construction Materials and Machinery

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Other PEC EPE Exam Past Paper Questions

    A concrete mix contains cement, sand, and coarse aggregates in the ratio of 1:2:4 by weight. If the total weight of the mix is 1000 kg, calculate the weight of each component in the mix.

    Solution:

    Weight of cement = (1 / (1+2+4)) * 1000 kg = 1000/7 kg ≈ 142.86 kg

    Weight of sand = (2 / (1+2+4)) * 1000 kg = 2000/7 kg ≈ 285.71 kg

    Weight of coarse aggregates = (4 / (1+2+4)) * 1000 kg = 4000/7 kg ≈ 571.43 kg

    Answer:

    Weight of cement ≈ 142.86 kg

    Weight of sand ≈ 285.71 kg

    Weight of coarse aggregates

    A rectangular concrete slab has dimensions 5 meters by 3 meters and a thickness of 0.15 meters. Calculate the volume of concrete required to construct the slab.

    Solution:

    Volume of concrete = Length × Width × Thickness

    Volume of concrete = 5 m × 3 m × 0.15 m = 2.25 cubic meters

    Answer: Volume of concrete = 2.25 cubic meters

    A cylindrical water tank has a radius of 2 meters and a height of 5 meters. Calculate the total volume of the tank.

    Solution:

    Volume of cylinder = π × Radius^2 × Height

    Volume of cylinder = π × 2^2 × 5 = 20π cubic meters ≈ 62.83 cubic meters

    Answer: Volume of the cylindrical tank ≈ 62.83 cubic meters

    The density of a certain construction material is 2500 kg/m³. If a cube of this material has edges measuring 1 meter, calculate the weight of the cube.

    Solution:

    Weight of the cube = Volume × Density

    Volume of the cube = Edge^3 = 1 m × 1 m × 1 m = 1 cubic meter

    Weight of the cube = 1 m³ × 2500 kg/m³ = 2500 kg

    Answer: Weight of the cube = 2500 kg

    A concrete mix has a water-cement ratio of 0.45. If the weight of cement used is 300 kg, calculate the weight of water required.

    Solution:

    Weight of water = Water-cement ratio × Weight of cement

    Weight of water = 0.45 × 300 kg = 135 kg

    Answer: Weight of water required = 135 kg

    The density of a certain construction material is 1500 kg/m³. If a rectangular block of this material has dimensions 2 meters by 1 meter by 0.5 meters, calculate the weight of the block.

    Solution:

    Volume of the block = Length × Width × Height

    Volume of the block = 2 m × 1 m × 0.5 m = 1 cubic meter

    Weight of the block = Volume × Density

    Weight of the block = 1 m³ × 1500 kg/m³ = 1500 kg

    Answer: Weight of the block = 1500 kg

    A construction company uses a cement-sand mortar mix with a ratio of 1:4 by volume. If the volume of cement used is 0.1 cubic meters, calculate the volume of sand required.

    Solution:

    Volume of sand = Sand-cement ratio × Volume of cement

    Volume of sand = 4 × 0.1 cubic meters = 0.4 cubic meters

    Answer: Volume of sand required = 0.4 cubic meters

    The specific gravity of a construction material is 2.5. If the weight of a certain volume of this material is 400 kg, calculate the volume of the material.

    Solution:

    Volume of the material = Weight / Specific gravity

    Volume of the material = 400 kg / 2.5 = 160 cubic meters

    Answer: Volume of the material = 160 cubic meters

    A cylindrical concrete column has a diameter of 0.6 meters and a height of 3 meters. Calculate the volume of concrete required to construct the column.

    Solution:

    Volume of cylinder = π × (Diameter/2)^2 × Height

    Volume of cylinder = π × (0.6 m / 2)^2 × 3 m ≈ 0.848 cubic meters

    Answer: Volume of concrete required = 0.848 cubic meters

    The specific gravity of a construction material is 2.0. If the weight of a certain volume of water is 1000 kg, calculate the weight of the same volume of the construction material.

    Solution:

    Weight of the material = Weight of water × Specific gravity

    Weight of the material = 1000 kg × 2.0 = 2000 kg

    Answer: Weight of the construction material = 2000 kg