BPR Infrastructure Civil Site Engineer Interview Questions and Answers

M20 grade concrete proportion is 1:1.5:3 (cement:sand:aggregate) with a compressive strength of 20 MPa.

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

• The proportion of cement, sand, and aggregate is 1:1.5:3 by volume.

• The compressive strength of M20 grade concrete is 20 MPa.

• The water-cement ratio for M20 grade concrete is typically 0.5.

M40 concrete has a compressive strength of 40 megapascals (MPa).

• M40 concrete is a high-strength concrete mix commonly used in construction.

• It has a compressive strength of 40 MPa, which means it can withstand heavy loads and pressure.

• M40 concrete is typically used in the construction of bridges, high-rise buildings, and other structures that require high strength and durability.

The unit weight of a 20mm dia rod varies depending on the material it is made of.

• The unit weight of a 20mm dia rod made of steel is approximately 2.47 kg/m

• The unit weight of a 20mm dia rod made of brass is approximately 3.68 kg/m

• The unit weight of a 20mm dia rod made of aluminum is approximately 1.57 kg/m

Cube filling rod is technically known as 'Tamping rod'.

• Also known as tamping rod

• Used to compact concrete in cube molds

• Helps in removing air voids and ensuring uniform density

• Typically made of steel or iron

• Standard length is 16 inches with a diameter of 5/8 inch

BBS stands for Bar Bending Schedule.

• BBS is a document that provides details of reinforcement cutting length, type, and size of bars used in construction.

• It helps in estimating the quantity of steel required for construction.

• BBS is essential for ensuring the structural integrity and strength of the building.

• Example: BBS includes information on the number of bars, their diameter, spacing, and placement in beams, columns,