Voltas Interview Questions and Answers

Pre-tensioning is done before casting the concrete while post-tensioning is done after casting the concrete.

• Pre-tensioning involves applying stress to the tendons before the concrete is poured.

• Post-tensioning involves applying stress to the tendons after the concrete has hardened.

• Pre-tensioning is typically used in precast concrete elements like beams and slabs.

• Post-tensioning is commonly used in cast-in-place concrete structures like bridges and parking structures.

Cube test strength after 7 days is a measure of concrete's compressive strength.

• Cube test is conducted to determine the compressive strength of concrete after a certain period of curing, typically 7 or 28 days.

• The results of the cube test help in assessing the quality of concrete and its suitability for the intended purpose.

• The standard cube size for testing is 150mm x 150mm x 150mm.

• The strength of concrete is usually reported in megapascals (MPa).

Cube test strength after 28 days is a standard test to determine the compressive strength of concrete.

• Cube test involves casting cubes of concrete and testing them after 28 days to determine their strength

• The strength of concrete is usually measured in megapascals (MPa)

• The results of cube tests are crucial for ensuring the quality and durability of concrete structures

The pH-value of Bentonite slurry is typically around 8-9.

• Bentonite slurry is commonly used in construction for various purposes such as drilling fluid, tunneling, and soil stabilization.

• The pH-value of Bentonite slurry is important as it can affect its performance and compatibility with other materials.

• A pH-value of around 8-9 is considered ideal for Bentonite slurry in most applications.

Specific gravity of bentonite is approximately 2.0 to 2.7.

• Specific gravity of bentonite is typically between 2.0 to 2.7.

• It is important to know the specific gravity of bentonite when designing foundations or retaining walls.

• Specific gravity can vary depending on the type and quality of bentonite used.

Frequency of cube filling refers to how often a cube is filled with material or substance.

• Frequency of cube filling can vary depending on the project requirements and timeline.

• It is important to consider factors such as material availability, equipment efficiency, and labor resources.

• For example, in a construction project, the frequency of cube filling may be daily to ensure timely completion.

• Regular monitoring and adjustment of the filling frequency can help optimize the pro...read more