10+ Orcapod Consulting Services Interview Questions and Answers

I have experience working with various pavers including Caterpillar, Volvo, and Dynapac.

• I have used Caterpillar pavers on a highway resurfacing project in my previous job.

• I have also worked with Volvo pavers on a bridge construction project.

• Dynapac pavers were used on a road widening project that I was a part of.

• I am familiar with the features and capabilities of each of these pavers.

The maximum speed of paver during DBM laying should be around 2-3 km/h to ensure proper compaction and quality of the road surface.

• The maximum speed of the paver should be controlled to allow for proper compaction of the DBM layer.

• Excessive speed can lead to inadequate compaction, resulting in a weaker road surface and potential future issues.

• A speed of 2-3 km/h is generally recommended for DBM laying to achieve optimal compaction and quality.

• It is important for the operator ...read more

The maximum thickness of a layer in highway engineering is typically around 300 mm.

• Maximum thickness is usually limited to around 300 mm for practical and cost-effective reasons

• Thicker layers may lead to excessive settlement or instability

• Thinner layers may not provide adequate strength or durability

• Examples: Base course layer in flexible pavement is typically around 150-300 mm thick

PQC laying refers to the process of laying a Pavement Quality Concrete (PQC) layer on a highway.

• Prepare the subgrade by compacting and leveling the surface.

• Place a layer of granular sub-base material and compact it.

• Construct the edge forms to define the boundaries of the PQC.

• Pour the PQC mix onto the prepared surface and spread it evenly.

• Use a paver machine or manual methods to level and compact the PQC.

• Cure the PQC by applying water or curing compounds.

• Ensure proper jointing...read more

The laying temperature for DBM (Dense Bituminous Macadam) typically ranges from 140 to 160 degrees Celsius.

• Laying temperature for DBM is crucial for achieving proper compaction and bonding of the material.

• The temperature range of 140-160 degrees Celsius ensures that the DBM is workable and can be compacted effectively.

• Excessive heat can lead to premature cooling and inadequate compaction, while lower temperatures may result in poor bonding and durability.

• It is important to mo...read more

The maximum speed of a compactor varies depending on the type and model, but typically ranges from 2 to 6 miles per hour.

• The maximum speed of a compactor is usually between 2 to 6 miles per hour.

• The speed can vary based on the type of compactor (e.g. vibratory, smooth drum) and the model.

• Higher speed compactors are often used for larger projects where efficiency is key.

• Lower speed compactors are used for more precise compaction in smaller areas.

Slump is the required consistency of PQC (Pavement Quality Concrete) for proper construction.

• The required slump for PQC typically ranges from 20-40 mm.

• Slump test should be conducted at the site to ensure the correct consistency.

• Proper slump ensures good workability and strength of the concrete.

• If the slump is too high, it may lead to segregation and bleeding issues.

• If the slump is too low, it may result in difficulty in placing and compacting the concrete.

The bitumen percentage in Dense Bituminous Macadam (DBM) typically ranges from 5-7%.

• Bitumen percentage in DBM is usually around 5-7%

• The exact percentage may vary based on the specific mix design and project requirements

• Higher bitumen content provides better durability and resistance to weathering

• Lower bitumen content may result in a more rigid mix but may be prone to cracking

• Proper testing and quality control measures are essential to ensure the correct bitumen percentage

Soil bearing can be improved by various methods.

• Compaction of soil

• Adding stabilizers like lime, cement, or fly ash

• Preloading the soil with a heavy load for a period of time

• Improving drainage to prevent water accumulation

• Using geotextiles or geogrids to reinforce the soil

• Modifying the soil with chemical agents like sodium silicate or calcium chloride