RPP Infra Projects Site Engineer Interview Questions and Answers

The size of a concrete cube is typically 150mm x 150mm x 150mm for standard testing purposes.

• Standard size for concrete cube is 150mm x 150mm x 150mm

• Used for testing the compressive strength of concrete

• Other sizes may be used for specific projects or requirements

Steel is used in construction works due to its strength, durability, versatility, and cost-effectiveness.

• Steel is known for its high tensile strength, making it ideal for supporting heavy loads in buildings and bridges.

• Steel is durable and resistant to corrosion, ensuring the longevity of structures.

• Steel can be easily fabricated into different shapes and sizes, allowing for versatile design options.

• Steel is cost-effec...read more

Concrete cover is provided in all structural members to protect the reinforcement bars from corrosion and fire damage.

• Concrete cover protects the reinforcement bars from corrosion caused by exposure to moisture and chemicals in the environment.

• It also provides protection against fire damage by acting as a barrier between the reinforcement and the fire.

• Proper concrete cover helps in maintaining the durability and streng...read more

Calculate the amount of steel required for a staircase based on design and dimensions.

• Calculate the total length of all the steel bars needed for the staircase

• Determine the diameter and spacing of the steel bars based on design requirements

• Consider the number of steps and the dimensions of the staircase in the calculation

• Account for any additional reinforcement needed for structural integrity

• Consult structural drawings

Concrete workability can be determined by conducting a slump test.

• Conduct a slump test to measure the consistency of the concrete mix.

• Adjust the water content or use admixtures to achieve the desired workability.

• Consider factors such as temperature, humidity, and type of aggregates in determining workability.

• Consult with concrete mix design experts for guidance on achieving the desired workability.

• Use tools like flow t...read more

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

• Slump test 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 workability of the concrete - higher slump means more workable concrete.

• The test helps ensure the concrete is of the right consistency for proper placement and compaction.

• Slump tes...read more

Concrete mix design is the process of selecting suitable ingredients and determining their proportions to produce concrete with desired properties.

• Involves selecting the right combination of materials like cement, aggregates, water, and admixtures

• Proportions are determined based on desired strength, workability, durability, and other properties

• Testing and adjusting the mix design to meet project requirements

• Example: A ...read more