Patel Infrastructure Store Executive Interview Questions and Answers

Shuttering quantity can be calculated by determining the surface area of the formwork and multiplying it by the depth of the concrete.

• Measure the length and width of the formwork

• Calculate the surface area by multiplying the length and width

• Multiply the surface area by the depth of the concrete to get the shuttering quantity

• Account for any additional formwork needed for corners or edges

Steel quantity can be calculated by using the formula: (D^2/162) x Length of steel

• Determine the diameter of the steel

• Calculate the length of the steel required

• Use the formula (D^2/162) x Length of steel to calculate the steel quantity

• Consider wastage and additional steel required for overlaps and joints

Initial setting time is the time taken by cement to harden to a certain degree.

• Initial setting time is the time taken by cement to harden to a certain degree.

• It is the time elapsed between the moment water is added to the cement and the time when the paste starts losing its plasticity.

• The initial setting time of cement is generally around 30 minutes to 1 hour.

• It is an important property of cement as it determines the t...read more

Lapping provides a smooth surface finish to the column.

• Clean the column thoroughly before lapping.

• Apply a lapping compound to the column surface.

• Use a lapping tool to rotate and move up and down the column.

• Continue lapping until the desired surface finish is achieved.

• Clean the column again after lapping to remove any residue.

Density of RCC is around 2500 kg/m3 and PCC is around 2400 kg/m3.

• RCC stands for Reinforced Cement Concrete and PCC stands for Plain Cement Concrete.

• Density of RCC depends on the mix design and the type of aggregates used.

• Density of PCC is lower than RCC due to absence of reinforcement.

• Density of concrete is an important factor in determining its strength and durability.

OPC is Ordinary Portland Cement while PPC is Portland Pozzolana Cement.

• OPC is made from raw materials like limestone and clay while PPC is made from a mixture of pozzolanic material and OPC.

• PPC has higher durability and strength compared to OPC.

• PPC is more eco-friendly as it uses industrial waste as a raw material.

• OPC is commonly used for construction of buildings and bridges while PPC is used for marine structures, hy...read more

The density of sand, water, and aggregate varies depending on their composition and temperature.

• The density of sand ranges from 1300 to 1700 kg/m³.

• The density of water is 1000 kg/m³ at 4°C.

• The density of aggregate varies depending on its size and composition.

• The density of fine aggregate ranges from 1600 to 1800 kg/m³.

• The density of coarse aggregate ranges from 1200 to 1500 kg/m³.

Clear cover provides protection and visibility.

• Clear cover protects the item from dust, dirt, and damage.

• Clear cover allows the item to be visible without removing the cover.

• Clear cover is commonly used for electronic devices, books, and documents.