Kcc Buildcon Assistant Engineer Interview Questions, Process, and Tips

The impact value test measures the toughness of aggregates used in road construction.

• The test involves dropping a steel ball from a specified height onto a sample of the aggregate.

• The amount of impact energy absorbed by the sample is measured and recorded as the impact value.

• For wearing course, the limit of impact value is 30 percent, while for base course, it is 45 percent.

• Aggregates with higher impact values are cons...read more

Unconsolidated compressive strength and CBR value are inversely related.

• Unconsolidated compressive strength is the strength of soil when it is not compacted.

• CBR value is the ratio of the force required to penetrate a soil sample to the force required to penetrate a standard material.

• As the unconsolidated compressive strength of soil increases, the CBR value decreases.

• This is because a stronger soil requires more force

CBR stands for California Bearing Ratio. It is a test to determine the strength of a soil subgrade or base course.

• CBR is performed by measuring the pressure required to penetrate a soil sample with a standard piston.

• The test is conducted by applying loads to the piston and measuring the penetration at each load increment.

• The CBR value is calculated as the ratio of the measured penetration to the penetration of a standa...read more

MDD and OMC are terms used in soil compaction testing. MDD is maximum dry density and OMC is optimum moisture content.

• MDD is the maximum dry density of soil achieved through compaction testing.

• OMC is the optimum moisture content of soil achieved through compaction testing.

• The minimum limit of MDD and OMC varies depending on the type of soil being tested.

• For example, the minimum MDD for a clay soil may be 1.6 g/cm³, whi...read more