Tulip Infratech QA QC Executive Interview Questions, Process, and Tips

Sieve analysis is a method used to determine the particle size distribution of sand.

• Sieve analysis involves passing a sample of sand through a series of sieves with different mesh sizes.

• The sand is placed on the top sieve and shaken to separate particles based on size.

• The weight of sand retained on each sieve is measured and used to calculate the percentage of sand in each size range.

• The results of sieve analysis can b...read more

The required capacity of the ctm machine in KN to test a cube of m 40 grade is dependent on the size of the cube and the testing standards.

• The capacity of the ctm machine is determined by the maximum load it can apply to the cube during testing.

• The cube size and testing standards determine the load requirements for testing.

• The required capacity can be calculated using the formula: Required capacity = Cube size x Testin

The weight of a cube can be determined by measuring its dimensions and using the formula: weight = density x volume.

• To determine the weight of a cube, measure its length, width, and height.

• Calculate the volume of the cube by multiplying the length, width, and height.

• Obtain the density of the material the cube is made of.

• Multiply the density by the volume to get the weight of the cube.

Precautions on cube mould before casting

• Ensure the cube mould is clean and free from any debris or previous concrete residue

• Apply a thin layer of oil or release agent to the inner surfaces of the mould to prevent sticking

• Check for any cracks or damage in the mould and replace if necessary

• Ensure the mould is properly aligned and securely fastened to prevent any leakage

• Use a vibrating table or vibrating rod to remove any...read more

The frequency of cubes casting refers to how often cubes are made for testing purposes.

• The frequency of cubes casting depends on the project requirements and quality standards.

• It is common to cast cubes at regular intervals during construction projects.

• The frequency may vary based on factors such as the type of concrete being used and the project timeline.

• For example, in a large-scale construction project, cubes may be...read more

Admixtures are substances added to concrete or mortar to enhance its properties.

• Water-reducing admixtures: reduce the amount of water needed for the desired workability of concrete.

• Retarding admixtures: delay the setting time of concrete, allowing more time for placement and finishing.

• Accelerating admixtures: speed up the setting time of concrete, useful in cold weather conditions.

• Air-entraining admixtures: create smal...read more

Water cement ratio is the ratio of the weight of water to the weight of cement used in a concrete mix. It affects the strength and durability of concrete.

• Water cement ratio determines the workability of concrete. Higher water content makes the mix more fluid and easier to work with.

• Excess water in the mix can lead to segregation and bleeding, resulting in a weaker and less durable concrete.

• A lower water cement ratio pr...read more

The water cement ratio can be reduced by using less water or increasing the amount of cement in the mixture.

• Use a lower water content in the mix

• Increase the amount of cement in the mix

• Use additives or admixtures to improve workability without increasing water content

• Optimize the particle size distribution of the aggregates

• Use a higher grade of cement