Hindustan Construction Company Site Engineer Interview Questions and Answers

A contour line is a line on a map connecting points of equal elevation above a given level, typically sea level.

• Contour lines represent elevation and terrain shape on topographic maps.

• They help visualize the steepness of slopes; closely spaced lines indicate steep terrain.

• For example, a contour line at 100 meters connects all points that are 100 meters above sea level.

• Contour lines can also indicate landforms like...read more

The density of RCC structure typically ranges from 2200 to 2500 kg/m^3.

• Density of RCC is influenced by the type and proportion of materials used.

• Common density range for RCC is 2200 to 2500 kg/m^3.

• Higher density indicates stronger and more durable RCC structure.

The elongation % of steel fy 500 is approximately 12%.

• Elongation % is the measure of ductility of a material.

• It is the percentage increase in length of a material before it fractures under tension.

• For steel fy 500, the elongation % is approximately 12%.

• This means that the steel can stretch up to 12% of its original length before it breaks.

The amount of cement required for 1 cubic meter varies depending on the concrete mix design.

• The amount of cement needed for 1 cubic meter of concrete varies from 250kg to 600kg depending on the mix design.

• The mix design specifies the ratio of cement to other materials like sand and aggregates.

• For example, a mix design of 1:2:4 requires 400kg of cement per cubic meter of concrete.

• It is important to accurately calcu...read more

Rolling margin is the difference between the actual thickness and the minimum thickness of a steel plate.

• Rolling margin is a term used in the steel industry to measure the thickness of a steel plate.

• It is the difference between the actual thickness and the minimum thickness of the plate.

• The rolling margin is important because it affects the strength and durability of the steel.

• For example, if the rolling margin is...read more

Slump test is a measure of the consistency of fresh concrete.

• It is used to determine the workability of concrete.

• The test involves filling a standard cone-shaped container with concrete and then removing the cone to see how much the concrete slumps or settles.

• The amount of slump is measured in millimeters and indicates the wetness or dryness of the concrete.

• Curing is the process of maintaining moisture in the conc...read more

Density of materials: Steel - 7850 kg/m3, Concrete - 2400 kg/m3, Sand - 1600 kg/m3

• Density of steel is higher than that of concrete and sand

• Density of concrete varies depending on the mix design

• Density of sand can vary depending on the source and moisture content

Initial setting time of cement is the time taken by cement to harden and attain a particular strength.

• Initial setting time is determined by Vicat apparatus

• It is the time taken for the cement to lose its plasticity and become hard

• The standard initial setting time for ordinary Portland cement is 30 minutes

• Factors affecting initial setting time include temperature, water-cement ratio, and type of cement