BNA Infrastructure Private Limited Project Engineer Interview Questions and Answers

Q1. Many questions on project and leadership
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Q1. Two types of road 1:- Flexible pavements 2:- Rigid pavement Surveying, NGL, Enchrochment, OGL
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Q2. FLEXIBLE PAVEMENT 1:- Embankment:- taking thickness 3m compacted .approximate,as per site conditions. Large size of soil particles 75mm lumps and cloud. Liquid limit <50% Plastic limit <25% Swelling a...read more
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Q3. 2:- Subgrade:- Total thickness 500mm compacted two layer 250mm &250mm vibration roller. Large size of soil particles 50mm lumps and cloud, Effective CBR as per design Compaction :- 97% Subgrade grad...read more
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Q4. Emulsion :- 1 :- prime coat :- low viscous cut back bitumen on wmm surfaces area and filling Up pores, voids . 2:- Tack coat:- Light application bitumen, asphalt, emulsion, and diluted water on the...read more
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Q5. DBM:- it total thickness 150mm two layer compacted 75mm&75 mm, aggregate size 20mm to. 28mm,VG30 Grade bitumen .
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Q6. Emulsion:- Tackcoat :- Light application of. Bitumen, asphalt, emulsion, and dilute water on the Surfaces area of DBM.
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Q7. BC :- Total thickness 40mm/ 50mm compacted. It is mixture of aggregate chips 13.1mm. and bitumen VG30 grade. Seal coat :- Total thicknesses of 6 to 8mm Mix with bitumen, gravel,and coars sand.
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Q8. Bituminous laying temperature 130 degree celceious to 150 degree celceious. Bituminous rolling temperature 80 degree celceious to 100 degree celceious.
Ans. 
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.
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Q9. RIGID PAVEMENT:-All process is a same above embankment to GSB. DLC:-150MM THICKNESSES TOLERANCE +/_6MM COMACTED PQC PAVEMENT:- 300MM THICKNESSES TOLERANCE +/-6MM COMPACTED
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Q10. DLC:- Material suitability 1:- Aggregate size is 26.5 mm 2:-water absorption 2% max 3:- Soundness test:- ..Naso4= 12% Mgso4=18% 4:...read more
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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
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Q11. DESIGN PROCEDURE. 1:-Use M15 grade concete. Aggregate and cement ratio 12:1 2:- The minimum cement content 150 kg/ cum. If the fly ash more than 20% the minimum cement contents 120 kg/cum. 3:-compre...read more
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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
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Q12. PQC :- Total thicknesses 300mm compacted tolerance +_6mm Material sutabilitey:- 1:- Aggregate size 31.5mm Water absorption to GSB DlC is same for PQC.
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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.
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Q13. DESINGN PROCEDURE:- 1:- The minimum cement content 360 kg/ cum, if the fly ash is more than 2o% The minimum cement content 310 kg percum. 2:-The flexuar strength of cement concete after 28day curing...read more
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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
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Q14. National highyway =2 to 4 lane Expressway. =6 to lane Construction coast of National 8 to 10 core /km Expressway construction coast= 14 core to 16core/ km
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Q1. Regarding my interest in the construction field specialization
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Q2. What will deserve company by you after you getting this opportunity
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Q1. What are your strengths and weaknesses?
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Q2. Tell me about yourself.
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Q3. Very patience. Salary Neagotation.
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Q1. Why CTS? are u willing to work in any location? expected salary?
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