Nagarjuna Construction Company HSE Manager Interview Questions and Answers

Concrete temperature refers to the temperature of freshly mixed concrete.

• Concrete temperature affects the setting time and strength development of concrete.

• It is important to control the temperature of concrete during mixing, transportation, and placement.

• High temperatures can accelerate the setting time and reduce workability, while low temperatures can slow down setting and strength gain.

• Concrete temperature is typic...read more

Precocious of water structure joint refers to the ability of a joint to withstand water pressure and prevent leakage.

• Water structure joints should be designed and constructed to be watertight.

• Various types of joints can be used in water structures, such as expansion joints, construction joints, and control joints.

• Proper sealing materials and techniques should be employed to ensure the integrity of the joints.

• Regular in...read more

Cube test results are used to determine the compressive strength of concrete at 7 and 28 days.

• Cube test involves casting cubes of concrete and testing them under compression

• Results are reported in terms of compressive strength in MPa or psi

• 7-day results are used to determine early strength and 28-day results are used to determine ultimate strength

• Concrete with a compressive strength of at least 20 MPa is considered sui

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.

Initial setting time of cement and high percentage required in sand are two different aspects of construction materials.

• Initial setting time of cement refers to the time taken by cement to set and harden after mixing with water.

• High percentage of sand is required in certain types of construction, such as concrete blocks and paving stones.

• The percentage of sand required depends on the type of construction and the desire...read more

High percentage of sand is required for better compaction and stability of soil.

• Sand helps in filling the voids between soil particles, increasing the density and reducing settlement.

• A high percentage of sand also improves drainage and reduces the risk of soil erosion.

• The ideal percentage of sand varies depending on the type of soil and the intended use of the construction project.

• For example, for road construction, a ...read more