Most Important 20 Technical Interview Questions and Answers For Civil Engineers

Most Important 20 Technical Interview Questions and Answers For Civil Engineers

 

 

 Top 20 Technical Civil Engineer Freshers Interview Question & Answer

 

Every Civil Engineer Must Know

 

1).What are the concrete tests?

 

Basically there are 4 common test of concrete

 

 

•Slump test,

 

•Compressive strength test,

 

•water permeability test,

 

•Water absorption test.

 

2).What is Least Cover Provided for different R.C.C Members?

 

 

 

When we talk Least cover As per IS code :-

 

•Footing = 50 mm

 

•Column = 40 mm

 

•Beam = 25 mm

 

•Slab = 20 mm

 

3).What is the cement sand & aggregate ratios for various grades of concrete mix?

 

various grade of concrete mix are following:-

 

 

 

•M 10 – 1:3:6

 

•M 15 – 1:2:4

 

•M 20 – 1:1.5:3

 

•M 25 – 1:1:2

 

•M 30 – 1:1:1

 

4).What is the Compressive Strength of brick?

 

 

 

When we talk about compressive strength of bricks, so

 

Second class brick- 70 kg/cm 2.

 

First class brick- 105 kg/cm 2.

 

Fire brick- 125 kg/cm 2.

 

5).What are common methods of curing the concrete?

 

when we comes to curing methods there are 5 common methods of curing

 

• Spraying.

 

• Wet covering of Surface.

 

• Ponding.

 

• Application of curing chemicals.

 

• Steam curing.

 

6).What are the types of cement?

 

 

When we talk about types of cement,there are various types of cement which are:

 

• Ordinary Portland Cement (O P C),

• White Portland Cement (W P C),

• Portland Pozzoloana Cement (P P C),

 

• Low Heat Portland Cement,

 

• Colored Portland Cement,

 

• Hydrophobic cement.

 

• Rapid Hardening Cement,

 

• Portland Slag Cement,

 

• Sulfate resisting Portland Cement, etc.

 

7).Name various authorities or workers on a construction site?

 

 

Basically common authorities or workers on a construction site are given below:-

 

• Senior Engineer/Project manager.

 

• Site Engineer.

 

• Contractor.

 

• Mistri.

 

•Mason/labor

 

8).What is the unit weight of Steel?

 

 

Unit weight of Steel  =  78.5 KN/m 3.

 

9).How do you check the quality of cement on the site?

 

 

following point should be observed :-

 

•Date of Manufacturing

 

Cement strength decreases with its age.

 

•Color

 

Color should be grey with light greenish shade and it should be uniform.  It is indication of excess lime or clay.

 

•Float test

 

if a good cement throw  in water it would not float

 

 The Feeling should be cool , When you put your hand in cement bag 

 

10).What are the types of a slump?

 

 

Basically concrete have 4 types of slumps

 

•True Slump

 

After the test when the slumps is  evenly all around without disintegration is called the true slump.

 

•Shear Slump

 

This type of slump is obtained in a lean concrete mix.When one-half portion of the concrete mass slide down the other is called the shear slump. 

 

•Collapse Slump 

 

When due to presence of excessive water the sample is collapsed, it is known as collapse slump.

 

•Zero Slump

 

When Concrete does nor show any changes of the slump after removing the slump cone , it is called Zero Slump.

 

11).What is the initial and final setting time of  cement ?

 

Initial setting time for ideal cement mix is =  30 minutes.

 

Final setting time of ideal cement mix is   = 10 hours.

 

12).What is bleeding in concrete?

 

 

When the water comes from the concrete during its placing it is called Bleeding. It is the form of segregation.

 

13).What do you mean by honeycomb in concrete?

 

Honeycomb, also known as air pocket, is nothing but the air voids in concrete. It is usually formed during concrete casting.

 

14).What’s the difference between one-way slab and two-way slab?

 

 

• One way slab: Ratio of Longer Span / Shorter span  >= 2 •

 

• Two way slab: Ratio of Longer span/ shorter span <= 2.

 

15).What is a crank length in the slab?

 

 

The crank length in Slab is 0.42 D. Where D is Depth of Slab- Top cover – Bottom Cover.

 

16).What is the Unit Weight of concrete?

 

 

As per IS : 456-200

 

Unit weight of P C C = 24 KN/m 3 and

 

R C C =  25 KN/m 3.

 

17).How to find the weight of steel bar used in reinforcement?

 

 

Weight of Bar in kg/m = D²/162.2  

 

Where, D =  Diameter of bar in mm.

 

18).What are various tests for checking brick quality?

 

 

following are the tests of bricks:-

 

• water absorption test,

 

• hardness test, shape & size,

 

• crushing strength test,

 

• soundness test, etc.

 

19).What is grouting?

 

Grout is a fluid form of concrete which is used to fill the voids.

 

20).What do you know about “T M T”?

 

 

Because of its manufacturing process

 

T M T stands for “Thermos Mechanically Treated”.

 

So, these are the basic 20 Technical Interview Questions and Answers for Freshers to remember it.

 

I Hope this video may be useful for all of you and specially for Freshers

 

Thanks for your Great Attention,

 

Good Bye

 

Happy Learning 😆 

 

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