IndianOil LNG Senior Manager Interview Questions and Answers

Bituminous laying temperature is 130-150°C and rolling temperature is 80-100°C.

• Bituminous laying requires higher temperature than rolling.

• Temperature range ensures proper compaction and adhesion.

• Temperature can vary based on the type of bitumen and aggregate used.

• Proper temperature control is crucial for quality bituminous pavement.

Material suitability criteria for aggregate in construction projects.

• Aggregate size should be 26.5 mm or less.

• Water absorption should not exceed 2%.

• Soundness test should show Naso4 not more than 12% and Mgso4 not more than 18%.

• Angle of abrasion should be less than 35% with max FI & EI less than 35%.

• Equivalent weight of sand should not be less than 50%.

• Aggregate should not be alkaline reactive.

• MDD & MCC should be as per

The design procedure for DLC mix includes using M15 grade concrete, minimum cement content of 150 kg/cum, and achieving a compressive strength of at least 10 MPA after 7 days of curing.

• Use M15 grade concrete with aggregate and cement ratio of 12:1

• Minimum cement content of 150 kg/cum, or 120 kg/cum if fly ash content is over 20%

• Achieve a compressive strength of at least 10 MPA after 7 days of curing

• DLC mix should be hom...read more

The question is about the suitability of aggregate size and water absorption for PQC with a total thickness of 300mm and tolerance of +/-6mm.

• Aggregate size of 31.5mm is suitable for PQC with a total thickness of 300mm and tolerance of +/-6mm.

• Water absorption to GSB DLC being the same for PQC is also suitable.

• The suitability of the material is important for the successful completion of the project.

The design procedure for cement concrete includes minimum cement content, strength requirements, dowel bar and tie bar specifications, and surface preparation and curing techniques.

• Minimum cement content of 360 kg/cum if fly ash is more than 20%, and 310 kg/cum otherwise

• Flexural strength of cement concrete after 28-day curing should be 4.5 MPa, and compressive strength should be 40 MPa

• Dowel bar size of 32mm dia and 300...read more

The weight of concrete per cubic metre varies depending on the mix and density.

• The weight of normal concrete is around 2400 kg/m³

• Lightweight concrete can weigh as little as 1600 kg/m³

• Heavyweight concrete can weigh up to 3800 kg/m³

• The weight of concrete can also be affected by the aggregates used