L&T Construction Project Trainee Interview Questions and Answers

Q1. Tell me about yourself
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Q2. What is key things to start a project
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Q3. WCC and it helps
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WCC stands for Work Control Center and it helps in coordinating and managing project tasks efficiently.
• WCC serves as a central hub for project information and communication

• It helps in assigning tasks, tracking progress, and resolving issues in a timely manner

• Example: WCC software like Asana or Trello can be used to streamline project coordination
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Easy to Moderate Level Questions

Q1. Medium to Difficult and Numerical Question
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Q1. Technical Question From Qualification and Resume Based
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Q1. Introduction, Some General Knowledge
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Q1. What is the pressure rating for steam pipes?
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Q2. What did you do in your project? And asked in depth questions including construction and mechanical engineering
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Q1. Two types road 1 Flexible pavement 2 Rigid pavement Before new project start Surveying, NGL,Encroachment , OGL
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Q2. Flexible pavement:- 1:- EMBANKMENT:- Take thicknesses 3m approximately as per site conditions 95% compaction 1:- large size soil particles 75mm lumps and cloud. Liquid limit <50%, plastic limit<25% Swel...read more
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The question is about the specifications of different layers in a flexible pavement.
• The embankment layer has a thickness of 3m and is compacted at 95% with large size soil particles and effective CBR as per design.

• The subgrade layer has a total thickness of 500mm and is compacted at 97% with large size soil particles and effective CBR as per design.

• The GSB layer has a total thickness of 300mm and is a mixture of aggreg...read more
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Q3. Emulsion:- Prime coat:- low viscous cut back bitumen on wmm surfaces area and filling pores and void. Tackcoat:- Light application bitumen , asphalt, emulsion and diluted water on wmm surfaces area.
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Q4. DBM:- it total thickness of 150mm compacted two layer 75mm and 75mm It mix with aggregate 20mm to 28mm and bitumen VG30 GRADE.apply on si
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Q5. Tackcoat;- light application bitumen, asphalt,emulsion and dilute water on DBM Surfaces area. BC:- It is total thickness of 50mm compacted ,aggregate size 13.1mm and bitumen VG30 grade on DBM. Seal co...read more
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Q6. Laying of bitumen concete. :-130 degree celceious to 150 degree celceious. Rolling on bitumen concete :-80 degree celceious 100 degree celceious
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Q7. Rigid pavements:- 1 :- DLC= 150MM 2:-PQC = 300MM
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Q8. DLC:-Material sutabilitey 1:- Aggregate size 26.5 mm 2:- water absorption max2% 3:- Soundness test Naso4 - 12% Mgso4-18% 4:- Angle of abr...read more
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Q9. DESINGN PROCEDURE :- 1:- Use M15 grade concrete. Aggregate and cement ratio 1:2 2:- The minimum cement content 150kg percum. If flayash is more than 20% the minimum cement contents 120 kg percum. 3:- T...read more
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Design procedure for laying M15 grade concrete with specific requirements for cement content, compressive strength, and compaction.
• Use M15 grade concrete with aggregate and cement ratio of 1:2

• Minimum cement content of 150kg per cum, or 120kg per cum if flyash is more than 20%

• Ensure compressive strength of 10MPA after 7 days curing, with no sample below 7.5MPA

• Ensure DLC premix batching plant material is homogeneous and ...read more
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Q10. PQC:- Material sutabilitey 1:- Aggregate size 31.5mm Material sutabilitey of pqc from Soundness test to sand equivalent
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Q11. Design procedure of PQC:- Use M40 grade concrete. 1:- The minimum cement content 360kg percum. If flyash more than 20% the minimum cement contents 310 kg percum. 2:-The flexuar strength of cement ...read more
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Design procedure for PQC using M40 grade concrete
• Minimum cement content of 360kg per cum

• Flexural strength of 4.5MPA and compressive strength of 40MPA after 28-day curing

• Dowel bars and tie bars provided for load transfer and prevention of cracking and deflection

• PQC mix prepared in pre-mix batching plant and transported to site

• Separation membrane and texturing and sawing operations performed for proper finishing

• 28-day cu...read more
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Q12. DIFFERENT TYPES OF CARRIAGE WAY 1 :- Single lane- 3.75 m 2:- Multlane;- 3.50m 3:- Inter mediate lane:- 5.5m 4 Two lane :- 7.5 m 5:- Thee lane:- 10.50m 6:- Four lane:- 7.5m+ 7.5m
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Different types of carriage way include single lane, multilane, intermediate lane, two lane, three lane, and four lane.
• Single lane has a width of 3.75m

• Multilane has a width of 3.50m

• Intermediate lane has a width of 5.5m

• Two lane has a width of 7.5m

• Three lane has a width of 10.50m

• Four lane has a width of 7.5m + 7.5m
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Q13. TYPES CAMBER 1 :- STRIGTH CAMBER 2:- PAROBOLIC CABER 3 STRAIGHT AND PARABOLIC CAMBER cc amber 1 in 50 to 1in60 Bitumen CAMBER 1in40 to 1in 50 camber Wmm camber 1in30 to 1in40
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Q14. CBR;- Developed by the California division State of high way to classify and evaluting 1: soil subgrade 2:-GSB CBR-=3% TO 15% Clay=<8% Sand 15% to 35% Gravel >25% THICKNESSES OF PAVEMENT T= (1.75P/...read more
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Q1. Two types of pavent 1:- Flexible pavement 2:-rigid pavement Types of progect 1:- New progect 2:- Realigment of road
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Flexible pavement and rigid pavement are two types of pavements used in different types of road projects.
• Flexible pavement is made of multiple layers of materials that can flex under traffic loads.

• Rigid pavement is made of a single layer of concrete or asphalt that is rigid and does not flex.

• New projects involve constructing roads from scratch, while realignment projects involve changing the alignment of existing roads...read more
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Q2. Constrution process:- surveying, enchrochment ,NGL, OGL
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Q3. Flexibile road :- 1:- Embankment as per site now taken thickness 3M , Large size of soil particles75mm lumps& cloud , liquid index<50% , plastic limit <25% , Swelling &shrinkage <50% , effective cbr as per...read more
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Q4. 3:- confinement layer or new blanket
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Q5. 4:- WMM:- It is mixture of aggregate and binding material, aggregate size4.75mm to 20mm. Binding material used stone dust ,morum,flyash, total compacted 300mm. Two layer 150mm &150mm. It is mix in pre mix...read more
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Q6. (a) Prime coat:- low viscous cut back bitumen on wmm surface area fil up pores and void. (b) Tack coat:- Light application bitumen, ashphalt,emulsion,and dilute water applied on the prim coat.
Ans. 
The question describes the application of prime coat and tack coat on a WMM surface.
• Prime coat is a low viscous cut back bitumen used to fill up pores and voids on a WMM surface.

• Tack coat is a light application of bitumen, asphalt, emulsion, or dilute water applied on the prime coat.

• The purpose of the prime coat is to bond the WMM surface with the subsequent layers of asphalt.

• The tack coat helps in providing a strong b...read more
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Q7. 5 :- DBM:- It is total thickness 150mm. Compacted in two layer 100mm & 50mm Aggregate size 20mm to 28mm ,bitumen viscous grade VG30 grade bitumen mixture.
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Q8. Tack coat :- light application bitumen ,Asphalt, emulsion,and diluted water on the surface area of DBM.
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Q9. 6:- BC :- It is total thicness 50 mm compacted. It is mixture of aggregate size 13.1mm bitumen VG30 grade viscous.
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Q10. 7:- Seal :- 6mm to 8mm thickness grvel or coarse sand mix with bitumen on BC course .provided camber on flexble pavement 1in 40 to 1in 40.
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Q11. RIGID PAVEMENT :- All the process of embankment to GSB is same. DLC:- Specification 1 :- Aggregate size 26.5 mm 2:-water absorption<2% 3 :- soundness test :- Naso4 12% ...read more
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Q12. DESIGIN PROCEDURE :- DLC thickness 150mm. 1:- use M15 grade concrete,max aggregate cement ratio 12:1 2:-The minimum cement content 150kg per cum. If flayash is more than >20% the mini.mum cement content. ...read more
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Design procedure for 150mm DLC thickness using M15 grade concrete with specific requirements for cement content, testing, mixing, transportation, compaction, and curing.
• Use M15 grade concrete with maximum aggregate cement ratio of 12:1

• Minimum cement content of 150kg per cum, or 120kg per cum if flyash is more than 20%

• Perform 5 sample cube test after 7 day curing with strength of 10 MPA, and 1 sample cube test after 7 d...read more
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Q13. PQC:- TOTAL THICKNESS 300MM Aggregate size 31.5mm. All specificition is same as DLC.
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Q14. Design procedure :- 1 :- The minimum cement content 360 kg per cum.if the fly ash is more than 20% the minimum cement content 310 kg per cum. 2 :-The flexure strength of cement concrete after 28 days cur...read more
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Design procedure for Senior Project Manager role including cement content, strength, joint design, and surface finishing.
• Minimum cement content of 360 kg per cum, or 310 kg per cum if fly ash is more than 20%

• Flexure strength of cement concrete after 28 days curing is 4.5 MPA

• Compressive strength of cement concrete after 28 days curing is 40 MPA

• Dowel bar provided for expansion joint vehicle load transfer between slabs

• Tie...read more
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Q15. CBR:- Developed by calforina division state highway to classiy soil sub grade &GSB CBR=3%-25% CLAY<8% SAND 15% -35% GRAVEL>25% THICKNESS OF PAVEMENT T=( 1.75P/CBR - A/3.14)
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How to ensure team.efficiency

A case study on conflict management

Q1. Why do you want this job
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