Rajhans (Desai-Jain) Group Junior Engineer Civil Interview Questions and Answers

Different grades of concrete are used for different structures based on their strength requirements.

• Different grades of concrete like M5, M10, M15, M20, M25, etc. are used for different structures.

• For example, M5 grade concrete is used for PCC (Plain Cement Concrete) work, while M20 grade concrete is used for RCC (Reinforced Cement Concrete) work.

• Higher grades like M30, M35, M40, etc. are used for structures requiring

D-wall stands for Diaphragm wall, a reinforced concrete wall constructed in the ground to support excavation and prevent water ingress.

• D-wall is commonly used in deep excavation projects to provide lateral support and prevent soil movement.

• It is constructed by excavating a trench, installing reinforcement bars, and pouring concrete into the trench.

• D-walls are often used in construction of underground structures like ba...read more

In high water level areas, foundation work involves dewatering techniques to lower the water table and ensure stability.

• Dewatering techniques such as wellpoint systems, deep wells, sumps, and pumping are used to lower the water table.

• Waterproofing measures like using impermeable membranes or grouting can be applied to prevent water infiltration.

• Proper drainage systems are installed to divert water away from the foundat...read more