Galfar Junior Engineer Civil Interview Questions and Answers

PH value is not applicable to weather as it is a measure of acidity or alkalinity of a solution.

• PH value is a measure of the concentration of hydrogen ions in a solution.

• It is used to determine the acidity or alkalinity of a solution on a scale of 0 to 14.

• Weather does not have a PH value as it is not a solution.

• However, PH value can be affected by weather conditions such as acid rain.

Water cement ratio is the ratio of the weight of water to the weight of cement used in a concrete mix.

• It is an important factor in determining the strength and durability of concrete.

• A lower water cement ratio results in stronger and more durable concrete.

• The ideal water cement ratio varies depending on the type of concrete and its intended use.

• For example, a water cement ratio of 0.45 is recommended for concrete used ...read more

Unit weight of 1m³ steel?

• The unit weight of steel varies depending on its type and grade

• The density of mild steel is around 7850 kg/m³

• The density of stainless steel is around 7480 kg/m³

• The density of high carbon steel is around 7850 kg/m³

• The density of low carbon steel is around 7700 kg/m³

M-20 and M-25 are concrete mix ratios used in construction.

• M-20 concrete mix ratio is 1:1.5:3 (cement:sand:aggregate)

• M-25 concrete mix ratio is 1:1:2 (cement:sand:aggregate)

• The strength of concrete increases with the increase in the mix ratio

• M-20 is generally used for non-structural works while M-25 is used for structural works

Unit weight of 1m³ cement?

• Unit weight of cement varies from 1440 to 1840 kg/m³ depending on the type of cement used.

• The most commonly used cement, Portland cement, has a unit weight of 1506 kg/m³.

• Unit weight is important in determining the amount of cement required for a project.

Volume of a bag of cement?

• A standard bag of cement weighs 50 kg

• The volume of a bag of cement depends on its density

• Assuming a density of 1440 kg/m³, the volume of a bag of cement is 0.0347 m³