Gujarat State Police Housing Corporation Area Sales Manager Interview Questions and Answers

Initial setting time of cement is the time taken by the cement to harden and attain a particular level of strength.

• The initial setting time of cement is typically around 30 minutes to 2 hours, depending on the type of cement and environmental conditions.

• This time is important for construction workers to know, as it determines when they can start working with the cement.

• The setting time can be affected by factors such a...read more

To calculate kg of bar for 1 mtr, we need to know the density of the bar.

• Density of the bar is required to calculate the weight of the bar per unit length.

• Formula: Weight of bar = (D^2/162) * L, where D is diameter of the bar and L is length of the bar.

• Density of steel is 7850 kg/m^3, so weight of steel bar of 1 meter length with diameter of 20 mm will be (20^2/162) * 1 * 7850 = 24.2 kg.

Workability of concrete refers to its ability to be easily mixed, placed, and compacted.

• Workability is affected by factors such as water content, aggregate size and shape, and cement content.

• Concrete with good workability can be easily placed and compacted without segregation or bleeding.

• Workability can be measured using tests such as slump test, flow test, and compacting factor test.

• Different types of concrete may req...read more