S B Construction Billing Engineer Interview Questions and Answers for Experienced

Unit weight of steel varies based on diameter, with larger diameters having higher unit weights.

• Unit weight of steel increases with larger diameter

• Common unit weights for steel: 6mm - 0.22 kg/m, 8mm - 0.39 kg/m, 10mm - 0.62 kg/m, 12mm - 0.89 kg/m

• Formula for calculating unit weight of steel: (D^2/162) where D is the diameter in mm

Specific gravity is the ratio of the density of a substance to the density of a reference substance.

• Specific gravity is a unitless quantity.

• It is commonly used in fields such as engineering, physics, and chemistry.

• For example, the specific gravity of gold is around 19.3, meaning it is 19.3 times denser than water.