L. N. Malviya Infra Projects Group Assistant Highway Engineer Interview Questions, Process, and Tips

Q1. What is your name
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Q2. What is the bitumen percentage in DBM
Ans. 
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 ...read more
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Basic knowledge of IQ and quantitative and basic reasoning.

Q1. Basic to advanced knowledge about civil engineering Highway, transportation.
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Q1. Personal details and salary discussion
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Q1. What is required slum for PQC?
Ans. 
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 i
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Q2. What is laying temprature for DBM?
Ans. 
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 r...read more
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Q3. What is the maximum thickness of a layer?
Ans. 
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
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Q4. What is the maximum speed of a compactor
Ans. 
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 c
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Q5. What should be the maximum speed of paver during DBM LAYING?
Ans. 
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 optima...read more
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Q1. Tell me about yourself
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Q2. When did you complete your Degree
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Q1. What was the thickness of different layer in your last project?
Ans. Sub grade-500mm, WMM-200mm,DLC-150mm,Sand-10mm, Plastic sprater-100micron thick, PQC-360mm.
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Q2. How do you laying pqc?
Ans. 
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...read more
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Q3. Which Company Paver do you use?
Ans. 
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.
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Q4. Writgen company paver
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