Persistent Systems Interview Questions and Answers

The grade of M20 concrete refers to the mix ratio of cement, sand, and aggregate used in the concrete mix.

• M20 concrete has a mix ratio of 1:1.5:3 (1 part cement, 1.5 parts sand, 3 parts aggregate)

• The compressive strength of M20 concrete is 20 MPa (Megapascals) after 28 days of curing

• M20 concrete is commonly used for residential construction like foundations, slabs, and columns

Minimum 12 mm column is used in structures for providing adequate strength and stability.

• Minimum 12 mm column is used to ensure structural integrity and load-bearing capacity.

• Thicker columns are typically used in high-rise buildings or structures with heavy loads.

• Reinforcement bars of 12 mm diameter or larger are commonly used in column construction.

The density of steel varies depending on the type of steel, typically ranging from 7,750 to 8,050 kg/m^3.

• The density of steel is usually around 7,750 to 8,050 kg/m^3.

• Different types of steel may have slightly different densities.

• Density is an important factor to consider in structural engineering and construction.

Steel weight refers to the mass of steel used in a structure or component.

• Steel weight is typically measured in kilograms or pounds.

• The weight of steel can vary depending on the type of steel used and the dimensions of the structure.

• Calculating steel weight involves multiplying the volume of steel by its density.

• Steel weight is an important factor in structural engineering to ensure the stability and safety of a building or infrastructure.

• For example, a steel beam used in con...read more

Grade of M20 refers to the mix ratio of concrete, commonly used in construction projects.

• M20 grade concrete has a mix ratio of 1:1.5:3 (1 part cement, 1.5 parts sand, 3 parts aggregate)

• It is commonly used for residential construction projects like foundations, slabs, and beams

• The strength of M20 concrete is 20 MPa (megapascals) after 28 days of curing