Rkv Infraprojects Senior Supervisor Interview Questions and Answers

To calculate the volume of a concrete column, use the formula for the volume of a rectangular prism.

• Volume = Length × Width × Height

• For dimensions 0.950 m (Length), 0.750 m (Width), and 2.1 m (Height):

• Volume = 0.950 × 0.750 × 2.1 = 1.49325 m³

• Ensure all dimensions are in the same unit before calculation.

To determine the number of sand layers for 1.5 meters, consider the thickness of each layer.

• Determine the thickness of each sand layer (e.g., 0.1 meters).

• Divide the total depth (1.5 meters) by the thickness of one layer.

• Example: For 0.1m layers, 1.5m / 0.1m = 15 layers.

• Adjust the calculation based on the desired thickness of each layer.

The recommended thickness of slab cover typically ranges from 20 to 40 mm, depending on structural requirements.

• Standard cover for reinforced concrete slabs is usually 20 mm.

• For slabs exposed to aggressive environments, a cover of 30 mm or more may be recommended.

• In seismic zones, thicker covers (up to 40 mm) can enhance structural integrity.

• Local building codes may specify minimum cover requirements based on material ...read more

The lap is placed in the column to ensure proper alignment and support for structural integrity.

• The lap splice should be placed in the tension zone of the column to enhance strength.

• Ensure that the lap length meets the design specifications for load-bearing capacity.

• For example, in reinforced concrete columns, the lap should be staggered to avoid weak points.

• Proper placement helps in distributing loads evenly and preve...read more

M-25 grade concrete has a mix ratio of 1:1:2, indicating one part cement, one part sand, and two parts aggregate.

• M-25 is a nominal mix with a compressive strength of 25 MPa.

• The mix ratio is typically 1 part cement, 1 part sand, and 2 parts coarse aggregate.

• Water-cement ratio is crucial; usually around 0.4 to 0.5 for M-25.

• Example: For 1 cubic meter of M-25, use approximately 400 kg of cement, 400 kg of sand, and 800 kg ...read more

Concrete cubes are typically filled in multiple layers to ensure proper compaction and strength.

• Generally, 2 to 3 layers are used for filling a concrete cube.

• Each layer should be approximately 5 to 10 cm thick.

• Compaction is done after each layer to eliminate air pockets.

• For example, in a 15 cm cube, you might fill it in 3 layers of 5 cm each.

Calculate the shuttering quantity for a concrete volume of 1m x 0.75m x 2.4m.

• Volume = Length x Width x Height = 1m x 0.75m x 2.4m = 1.8m³.

• Shuttering is used to form the shape of concrete until it sets.

• Consider additional shuttering for openings or reinforcements.

• Example: If using plywood, calculate the area of each panel needed.