Highway Site Engineer Interview Questions and Answers

Different types of sieves for WMM gradation include 80mm, 40mm, 20mm, 10mm, and 4.75mm.

• 80mm sieve

• 40mm sieve

• 20mm sieve

• 10mm sieve

• 4.75mm sieve

The width of the embankment top layer can be calculated using trigonometry.

• Use trigonometry to calculate the width of the embankment top layer.

• The width can be calculated using the formula: width = 2 * height * tan(angle)

• In this case, the angle is the angle of repose (ogl) which is typically around 30-45 degrees.

The Grade of GSB at my previous site was 40 mm.

• The Grade of GSB at my previous site was 40 mm.

• GSB stands for Granular Sub Base.

• The thickness of GSB is usually specified in millimeters.

• GSB is a layer of compacted granular material used as a base for asphalt, concrete, or other paving materials.

Tolerances in base and sub-base coarse materials are critical for ensuring proper compaction and stability of the highway.

• Tolerances for base coarse typically range from +/- 20mm to +/- 40mm depending on the specified thickness.

• Tolerances for sub-base coarse are usually wider, ranging from +/- 50mm to +/- 100mm.

• Proper compaction is essential to meet these tolerances and ensure the structural integrity of the highway.

• Tolerances may vary based on project specifications and loca...read more

Gradation for GSB refers to the particle size distribution of Granular Sub Base material.

• Gradation for GSB is typically specified by the percentage of various particle sizes present in the material.

• The gradation helps in determining the suitability of GSB for its intended use in road construction.

• Common gradation requirements for GSB include limits on the percentage of fines, coarse aggregates, and other specific sizes.

• For example, a typical gradation for GSB may require a ce...read more