Top Civil Engineering interview questions and answers which are generally asked in interviews for all freshers and practising engineers are mentioned here . Hope you find these useful.These are under various headings of general, Structural and Geo-technical .

## Top Interview Questions for Site Engineer Post

Site Engineer is plays a very crucial role in civil engineering as site engineer is the one responsible for actual execution as per engineering drawings. A thorough understanding of drawings is very much necessary for becoming a successful Site engineer. Here lets us see a few interview Questions related to civil Site engineer.

- What are Duties and Responsibilities of Site engineer
- Various Tests to be performed on construction materials arrived at site sand, cement.
- How to perform Cube test
- Size of cube
- What is Slump cone test.
- How is cylinder strength checked.
- Understanding of basic codes IS 456, ACI and AISC codes etc.
- Height from which the concrete to be poured.
- If a detail is missing or not clear in the drawing,how it is dealth with. Take a decision at site or ask the design office.
- Understanding all the views and blow out details in the drawing.
- Information found in Construction notes.
- Key Plan and orientation of North direction.
- Size of Vibrators used at site
- Tool box talk
- Safety measures taken at site related to workers and Equipment.
- Concrete Pour card report

## Top Civil Engineering Interview Questions and Answers Related to civil and structural.

Here below are some interview Questions which are commonly asked in interviews for all fields of civil engineering

**What is the IS code for Plain and Reinforced Concrete**

IS :456

**What are the standard american codes for steel and concrete**

ACI and AISC

**What is the code of practice for General Construction in steel**

IS :800

**What is the code of Practice for loads**

IS : 875 part 1 – Dead Loads

IS :875 part 2 – Live Loads

IS : 875 part 1 – Dead Loads

IS :875 part 2 – Live Loads

IS :875 part 3 – Wind Loads

IS :875 part 4 – Snow Loads

**What is the IS code for Earthquake /Seismic**

IS :1893

**What are different grades of concrete**

**What does M and 25 mean in M25 grade of concrete**

M refers to the Mix and 25 is the characteristic compressive strength of 15 cm cube at 28 days in N/sq.mm

**Basic Design philosophy followed**

Working Stress and Limit State method

**What is the standard size of brick**

19 cm x 9 cm x 9 cm

**What is the purpose of providing frog on brick**

It is form key for holding mortar and joint to another brick above

**What are initial and Final setting times of cement**

Initial setting is about 30 min and final setting time is about 10 hrs.

**What are basic Admixtures used for concrete**

Acclerators : – To shorten the setting time Eg – Calcium chloride

Retarder : – To delay the setting time Eg – Carbohydrate derivatives

**Which type of cement is used is construction of massive Dam structures**

Low heat cement

**What are the equations of static equilibrium**

Summation of all horizontal , vertical and Moments equals to 0 i.e sumof all FX , FY and FZ forces = 0 and Moments about any point equals to 0.

**What is statically indeterminate strucutre**

A structure in which number of unknown forces is greater than the equations of equilibrium cannot be determined by Equilibrium equations..

**A point in space has how many degrees of freedom**

6 degrees

**For Steel structures what is permissible vertical deflection**

Span / 325

**What is the bending stress equation**

M/I = fb/y =E/R where

M -Bending Moment

I – Moment of Inertia

fb – Bending Stress

y – Distance from Neutral axis to the load

E – Modulus of elasticity

R — Radius of gyration

**What is effective length of compression member for condition effectively held in position at both ends and restrained against rotation at one end**

0.8L where L is unsupported length

**What is live load on sloping roof for slope greater then 10 deg**

Live Load is taken as 750 N/sqm less 20 N/sqm for every degree increase in slope over 10 deg.

**What is the flexure strength of concrete**

0.7 X Sqrt(fck) – fck is characteristic strength of concrete

**What is Modulus of elasticity of concrete**

5000 X sqrt (fck)

**What is effective cover**

Distance from face of concrete to Centre of gravity of steel bars.

**What is singly reinforced beam**

If reinforcement is provided only on single face then it is singly reinforced beam.

**What is balanced section**

If stress in concrete and steel reach their maximum values simultaneously then its balanced section.

**What is the minimum reinforcement in beams**

Ast/b*d = 0.85/ fy

**What is the maximum reinforcement in beams**

0.04*b*d

**What is the minimum reinforcement in slabs**

0.12 % of gross area

**What is the minimum reinforcement in columns**

0. 8% of area

**What is the maximum reinforcement in columns**

4%

**What are various checks in footing design**

Bending, shear,overturning and sliding

**Where is critical section for one way shear in footing**

At a distance “d” from face of column

**Where is critical section for two way or punching shear**

At a distance d/2 from face of column

**Where is the section for bending considered**

At the face of column

**What is the maximum no of steps in a flight**

12

**What are various limit states of strength**

Flexure, Compression, shear and torsion

**What are various limits states of serviceability**

Deflection, cracking and Vibration

**What is the slenderness limit for column**

Less than 12 , it is short column

More than 12 , it is Long column

**What are the minimum no of bars to be provided in rectangular column**

4

**What are minimum no of bars to be provided in circular column**

6

**What are various losses in prestressing**

a) Elastic deformation of concrete

b) Shrinkage of concrete

c)Creep of concrete

d) Relaxation of stress in steel

**Vicats apparatus is used for**

Consistency test

**Le chatliers apparatus is used for**

Soundness test

**when is masonry wall is said to be short wall**

If slenderness ratio is less than 8

**What is elastic limit**

If a body regains to original position after removal of load is elastic limit

**The shear stress on principal planes is**

Zero

**Which is more elastic mild steel or Rubber**

Mild steel

**What is Rate of change of shear force**

Load

**What is rate of change of bending Moment**

Shear force

**What are different methods of calculating deflection**

a) Conjugate Beam method

b)Moment area method

c)Strain energy method

d)Double integration method

**What is shear center in steel beam**

It is point or axis through which load acts

**What is Strut**

Struct is a compression member

**What is Modular ratio**

It is the ratio of Modulus of elasticity of steel to Modulus of elasticity of concrete

**What is the minimum diameter of bar used in column**

12

**What are bearing piles**

Bearing piles transfer the loads to the hard strata

**What are friction Piles**

Friction piles transfer the loads by friction between surface of pile and soil.

## Top Structural engineering interview Questions

Here are the List of some more civil engineering interview Questions related to structural Engineering

What are commonly used method in the design of structures – Working stress and Limit state method

Draw Stress strain diagram for Steel and concrete

- Shear force and bending moment diagrams for simply supported beams,fixed beams, simple frames and continuous beams.
- How to apply wind Load on structures. Steps involved.
- Procedure for Performing response spectrum analysis.
- Design of pile foundations.
- Calculate development length.
- Wind load on pipe racks.
- Understanding geo-technical report and considering Safe bearing capacity from the report.
- Lap Length
- Effective lengths of columns

Hope you find these useful, shall keep on adding interview Questions. Also find below few links for basics of civil and structural engineering

### Interview questions related to Geo technical engineering

Geotechnical is an important subject of civil engineering which deals with Soil Mechanics and Soil behaviour.

Here Let us see a few civil engineering interview questions related to Geo technical engineering

- What is Void Ratio
- Soil Classifications as per Sieve analysis
- What is RQD
- Understanding soil investigation report and considering suitable safe bearing capacity as recommended.
- Ground improvement techniques.
- Soldier Pile wall
- Slope stability analysis.
- Chemical Properties of soil.
- Calculations of Safe bearing capacity.
- How important is N value.
- What are active and passive Earth pressure.
- Soil Friction understanding.