KK Spun Pipes Assistant Engineer - Civil Interview Questions, Process, and Tips

M20 grade is a mix of concrete that has a compressive strength of 20 megapascals (MPa).

• M20 grade is commonly used in construction for residential and commercial buildings.

• It is a mix of 1 part cement, 1.5 parts sand, and 3 parts aggregate.

• The water-cement ratio should be around 0.5 for M20 grade concrete.

• M20 grade concrete is suitable for foundations, beams, and slabs.

• The curing time for M20 grade concrete is around 28

TMT stands for Thermo-Mechanically Treated bars, which are high-strength reinforcement bars used in construction.

• TMT bars are made by subjecting mild steel bars to a series of processes involving heat treatment and rapid cooling.

• The resulting bars have a hard outer layer and a soft inner core, making them more resistant to corrosion and fatigue.

• TMT bars are commonly used in reinforced concrete structures, such as build...read more

The density of steel is around 7.85 g/cm³.

• Steel density is the mass per unit volume of steel.

• It is measured in grams per cubic centimeter (g/cm³).

• The density of steel varies depending on its composition and properties.

• The density of mild steel is around 7.85 g/cm³.

• The density of stainless steel is around 7.9 g/cm³.

• The density of high carbon steel is around 7.8 g/cm³.

Nominal mix is a rough estimate of proportions while design mix is a precise mix of ingredients.

• Nominal mix is used for small construction projects while design mix is used for large projects.

• Nominal mix is not as accurate as design mix.

• Nominal mix uses volume batching while design mix uses weight batching.

• Nominal mix is cheaper than design mix.

• Example of nominal mix: 1:2:4 (cement:sand:aggregate)

• Example of design mix:

BBS stands for Bar Bending Schedule, which is a document that provides details of reinforcement steel required for a construction project.

• BBS is prepared based on the structural drawings and specifications provided by the client or consultant.

• It includes details such as the diameter and length of each reinforcement bar, the number of bars required, and the shape and size of the bar bends.

• BBS helps in estimating the qua...read more