Top Civil Engineering Interview Questions | Civil Interview Questions Mostly Asked (Afcons, L&T, Gammon)

civil engineering interview questions

The top selected civil engineering interview questions are basically asked in all reputed companies such as Larsen & Toubro, Afcons, Gammon. I promise the civil engineers that this article will be really helpful for you with all basic civil engineering interview questions and answers.

Why Interview Questions are Important:

Basic of civil engineering questions affect the essentials hiring managers want to know touching every candidate: who you are, why you’re adequate for the job, and what you’re good at. You may not inquire exactly these questions in exactly these words, but if you have answers in mind for them, you’ll be fid for just about anything the interviewer throws your way. 

By asking the civil engineering interview questions, they don’t exactly want to hear going your background. The scarceness to see that you understand what problems and censure they’re facing as an assembly or office as well as how you’ll strain into the existent organization. 

List of Questions to ask Interviewer:

Q.1 What are the steps involved in building construction?

            PCC (Plain Cement Concrete)
            Footing foundation
            Plinth beam
            Earth filling in the beam
            DPC (Damp Proof Course)
            Column construction
            Brick wall construction
            Stair casting
            Beam and Slab casting
            Lintel and Chhajja
            Pointing and Finishing
            Electrical fittings
            Plumbing fittings
            Painting work

Q.2   What is the slope of the staircase?

Ans.  25° to 40° (As per IS-Code 456-2000)

Q.3   The volume of one cement bag (50kg).

Ans.  0.0347 m³ or 1.23 cubic feet

Q.4   The expiry date of cement.

Ans.  3 months

Q.5   Size of hook in a stirrup.

Ans.  Total Hook Length - 9 x d

       (Note: Minimum hook length - 75mm)

Q.6   Initial setting time of cement.

Ans.  30 minutes

Q.7   Final setting time of cement.

Ans.  90 minutes

Q.8   Maximum free fall of concrete is allowed.

Ans. 1.5 m

Q.9   The minimum bar in a circular column should be.

Ans. 6 bars

Q.10   Different types of curing methods.

            Wet covering of the surface
            Curing chemicals
            Steam Curing

Q.11   Why foundation is provided and its type?

            Foundation is provided to safely distribute the load of the structure in the soil. 


            1. Shallow Foundation
                Individual footing or isolated footing
                Combined footing
                Strip foundation
                Raft or Mat foundation

            2. Deep Foundation
                Pile foundation
                Drilled Shafts or Caissons

Q.12   Calculation of weight of steel bar.

Ans.  W = D² L / 162 Kg/m (Standard size of steel bar in India is 12 m)

Q.13   When pile foundation is needed.

Ans.  Pile foundation is needed when the soil bearing capacity is less than 24 KN/m³.

Q.14   What is the unit weight of steel?

Ans.  78.5 KN/m³

Q.15   What is the density of steel?

Ans. 7850 kg/m³

Q.16   Unit Weight of concrete.

            RCC (Reinforced Cement Concrete) - 25 KN/m³
            PCC (Plain Cement Concrete) - 24 KN/m³

Q.17   Compressive strength of bricks.

            First-class brick - 105 kg/cm²
            Second class brick - 70 kg/cm²
            Third class brick - 125 kg/cm²

Q.18   Standard height of each floor.

Ans. 3m or in feet 9.8425

Q.19   What is the size of a concrete cube?

Ans. 15cm x 15cm x 15cm 

Q.20   What is the standard size of bricks?

            19cm x 9cm x 9cm 
            9inch x 4inch x 3inch

Q.21   First-class brick should not absorb water more than.

 Ans.  20 %

Q.22   The normal consistency of Portland cement.

Ans. 25 % (test by Vicat apparatus)

Q.23   Ring and ball tests are conducted on which construction material.

Ans. Bitumen

Q.24   The instrument used for level work on construction site.

 Ans.  Dumpy level

Q.25   Which test is conducted to determine the bearing capacity of soil.

Ans.  Plate Load Test

Q.26   Standard sand nowadays used in India is obtained from.

Ans.  Ennore (Madras)

Q.27   What is guniting?

 Ans.  It is a process in which a mixture of cement & sand proportion of 1:3 is shooted on a concrete surface with the help of gum pressure of 2 to 3 kg/cm².

Q.28   The function of the stirrup in a beam.

Ans.  Resist shear force and put the bar in position.

            One Acre                = 43560 sq.ft.
            One Square Meter = 10.76 sq. ft.
            One Hectare           = 2.47 Acres
            One Gallon             = 3.78 Liters

Q.30   Basic Full Forms for civil engineering interview-

            RCC - Reinforced Cement Concrete
            PCC - Plain Cement Concrete
            DPC - Damp Proof Course
            PSC - Pre- Stressed Concrete
            RMC - Ready Mix Concrete
            OPC - Ordinary Portland Cement
            JCB - Joseph Cyril Bamford
            DPR - Detailed Project Report
            NDT - Non-Destructive Testing
            UTM - Universal Testing Machine
            EGL - Existing Ground Level

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