Bharat Electronics Interview Questions and Answers

Compressive strength of concrete is typically measured after 14 and 28 days to assess its strength development.

• Compressive strength of concrete is usually measured in pounds per square inch (psi) or megapascals (MPa).

• After 14 days, the average compressive strength of concrete is around 60-75% of its ultimate strength.

• After 28 days, the concrete typically reaches about 90-95% of its ultimate strength.

• The percentage of strength gained from 14 to 28 days can vary depending on th...read more

Circular column concrete quantity can be found using the formula: Volume = πr^2h

• Calculate the area of the circular column using the formula A = πr^2

• Measure the height of the column

• Multiply the area by the height to get the volume of concrete needed

• Consider any additional factors such as wastage or reinforcement bars

Density of common construction materials

• Steel: 7850 kg/m^3

• Cement: 1440 kg/m^3

• Concrete: 2400 kg/m^3

• Sand: 1600-1700 kg/m^3

• Aggregates: 1500-1750 kg/m^3

Triangle concrete quantity can be found using the formula: 1/2 * base * height * thickness.

• Calculate the area of the triangle using the formula: 1/2 * base * height.

• Multiply the area by the thickness to get the concrete quantity.

• For example, if the base of the triangle is 5 meters, height is 8 meters, and thickness is 0.2 meters, the concrete quantity would be: 1/2 * 5 * 8 * 0.2 = 4 cubic meters.

Slump test is a method to measure the consistency of concrete before it sets.

• Slump test is used to determine the workability of fresh concrete.

• It involves filling a cone-shaped mold with concrete, then lifting the mold to see how much the concrete slumps or settles.

• The amount of slump indicates the consistency of the concrete - a higher slump means a more workable mix.

• Slump test helps in ensuring that the concrete mix has the right amount of water for proper hydration and str...read more

Column lap length is the length of overlap between two reinforcing bars in a column.

• Column lap length is important for ensuring proper structural integrity in a column.

• It is typically specified in construction drawings or codes.

• The lap length is determined based on the diameter of the reinforcing bars and the structural requirements.

• For example, a column may require a lap length of 40 times the diameter of the bar.

Mix ratios of concrete refer to the proportions of cement, sand, and aggregate used in a concrete mix.

• Mix ratios are typically expressed as a ratio of cement:sand:aggregate, such as 1:2:4.

• The mix ratio will vary depending on the strength and durability requirements of the concrete.

• Common mix ratios include 1:2:3 for low strength concrete and 1:1.5:3 for high strength concrete.

• Water is also added to the mix to achieve the desired consistency and workability.