Civil Engineering Interview Questions

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Civil Engineering Interview Questions (Top

70)

Important Civil Engineering Interview

Questions:

1. What is bending moment (BM) & She

1. What is bending moment (BM) & Shear force (SF)ar force (SF) – – Explain. Explain. 2. What are the steps involved in the concreting process, explain? 2. What are the steps involved in the concreting process, explain? 3. Describe briefly the various methods of concrete

3. Describe briefly the various methods of concrete curing.curing.

4. What is the minimum curing period? 4. What is the minimum curing period?

5. What Do You Understand by M25 Concrete? 5. What Do You Understand by M25 Concrete? 6. What is Water-Cement Ratio and How it

6. What is Water-Cement Ratio and How it is related to the strength of concrete?is related to the strength of concrete? 7. What is a bearing capacity of soil?

7. What is a bearing capacity of soil?

8. How to increase the bearing capacity of soil? 8. How to increase the bearing capacity of soil? 9. What are the different types of foundation? 9. What are the different types of foundation? 10. Explain moment of

10. Explain moment of inertia and its importance.inertia and its importance.

11. How do we determine the specific gravity of a cement? 11. How do we determine the specific gravity of a cement? 12. Density Of 1 cum cement?

12. Density Of 1 cum cement?

13. What are the causes of building collapse? 13. What are the causes of building collapse?

14. What is bar bending schedule (BBS) & how to prepare it? 14. What is bar bending schedule (BBS) & how to prepare it? 15. Why is concrete cube test carried out?

15. Why is concrete cube test carried out? 16. Why is concrete slump test carried out? 16. Why is concrete slump test carried out?

17. What is bleeding, segregation, honeycombing of concrete? 17. What is bleeding, segregation, honeycombing of concrete? 18. What is pre-stressed concrete? Which reinforcement is used in

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19. What is the ratio of steel and

19. What is the ratio of steel and concrete to use in slabs, beams, concrete to use in slabs, beams, columns?columns? 20. Difference between pre-tensioning and post-tensioning?

20. Difference between pre-tensioning and post-tensioning? Civil Engineering Interview Questions:

Civil Engineering Interview Questions:

21. What are the weights of 16mm, 12mm, 20mm, 25mm, 8mm Dia. Bars. 21. What are the weights of 16mm, 12mm, 20mm, 25mm, 8mm Dia. Bars.

22. What is the minimum Propping Period of Beams and Slabs of various Spans? 22. What is the minimum Propping Period of Beams and Slabs of various Spans? 23. What are the advantages of Prestressed Concrete over R.C.C?

23. What are the advantages of Prestressed Concrete over R.C.C? 24. Quantity of materials required for different works.

24. Quantity of materials required for different works. 25. Which is stronger solid steel rod or hollow steel 25. Which is stronger solid steel rod or hollow steel pipe?pipe? 26. Initial & final setting time of concrete?

26. Initial & final setting time of concrete? 27. Why we provide steel in concrete? 27. Why we provide steel in concrete?

28. Is brick strength more or concrete block? 28. Is brick strength more or concrete block? 29. How many bricks are there in 100cft? 29. How many bricks are there in 100cft?

30. 28 days compressive strength of concrete in PSI? 30. 28 days compressive strength of concrete in PSI? 31. How to calculate the unit weight of steel bars? 31. How to calculate the unit weight of steel bars? 32. What is Plinth Level and Sill Level?

32. What is Plinth Level and Sill Level? 33. What is Brest Wall?

33. What is Brest Wall?

34. What is Brick crushing strength(PSI)? 34. What is Brick crushing strength(PSI)? 35. How many are the types of joints? 35. How many are the types of joints?

36. How can cracks in concrete be avoided? 36. How can cracks in concrete be avoided? 37. Types Of DPC and its Thickness used? 37. Types Of DPC and its Thickness used? 38. 28 Days Strength of Concrete (1:2:4)? 38. 28 Days Strength of Concrete (1:2:4)?

39. How many types of slabs are there & how to design it? 39. How many types of slabs are there & how to design it? 40. How much is the cover for slab?

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41. Maximum % of Steel in columns and beams? 41. Maximum % of Steel in columns and beams? 42. What is fineness modulus?

42. What is fineness modulus? 43. What is Packing Factor? 43. What is Packing Factor?

44. Difference between one way slab & two way slab? 44. Difference between one way slab & two way slab? 45. Difference between QA & QC?

45. Difference between QA & QC? Civil Engineering Interview Questions:

46. What do you mean by Fe415? 46. What do you mean by Fe415?

47. What are the functions of a column in a building? 47. What are the functions of a column in a building? 48. How many feet are in 4 square yards?

48. How many feet are in 4 square yards? 49. What is the average density of soil? 49. What is the average density of soil?

50. What is the ratio of Grades M5, M7.5, M10, M15, M20, M25, M30, M35, M40? 50. What is the ratio of Grades M5, M7.5, M10, M15, M20, M25, M30, M35, M40? 51. Why foundation is provided?

51. Why foundation is provided?

52. The concrete slump recommended for beams and slabs; 52. The concrete slump recommended for beams and slabs; is-53. What is the meaning o

53. What is the meaning of soil reinforcement?f soil reinforcement?

54. What is the different type of slump test indications? 54. What is the different type of slump test indications? 55. What is buckling or crippling load?

55. What is buckling or crippling load?

56. Define slenderness ratio. What is its effect on the design of compression member? 56. Define slenderness ratio. What is its effect on the design of compression member? 57. Shear force and BM

57. Shear force and BM diagrams for different types of loadings on beams.diagrams for different types of loadings on beams. 58. Difference between mild steel and HYSD bars?

58. Difference between mild steel and HYSD bars? 59. What do you understand by 80/100 bitumen? 59. What do you understand by 80/100 bitumen? 60. What is differential settlement?

60. What is differential settlement? Civil Engineering Interview Questions:

61. What do 53 stands for in 53-grade cement? 61. What do 53 stands for in 53-grade cement?

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62. How do you construct a 25 storey building with no columns? 62. How do you construct a 25 storey building with no columns? 63. Types of loads on structure?

63. Types of loads on structure?

64. Difference between pre-tensioning and post-tensioning? 64. Difference between pre-tensioning and post-tensioning? 65. What is the L/D ratio of a cantilever beam?

65. What is the L/D ratio of a cantilever beam? 66. What is camber?

66. What is camber?

67. What is batching? Difference between volume and weight batching? 67. What is batching? Difference between volume and weight batching? 68. How is a theodolite leveled?

68. How is a theodolite leveled?

69. What is a benchmark? Name the different types. 69. What is a benchmark? Name the different types. 70. Types of admixtures?

70. Types of admixtures?

71. What are the CAD softwares you have used? 71. What are the CAD softwares you have used? 72. Interpret a strss vs strain curve.

72. Interpret a strss vs strain curve. 73. Define modulus of elasticity. 73. Define modulus of elasticity.

74. What are the chemical compositions of cement? 74. What are the chemical compositions of cement? 75. What is creep & shrinkage of concrete?

75. What is creep & shrinkage of concrete?

Useful Civil Engineering Tips For Site Engineers:

Following are the basic civil engineering tips

Following are the basic civil engineering tips you should be remembered while working on you should be remembered while working on aa construction site. construction site.

1. Grade Of Concrete:

M5 M5 – – 1 : 4 : 8 1 : 4 : 8 M10 M10 – – 1 : 3 : 6 1 : 3 : 6 M15 M15 – – 1 : 2 : 4 1 : 2 : 4

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M20

M20 – – 1 : 1.5 : 3 1 : 1.5 : 3 M25

M25 – – 1 : 1 : 2 1 : 1 : 2

2. Clear Cover To Main Reinforcement:

Footings : 50 mm

Raft Foundation (Top) : 50 mm Raft Foundation (Top) : 50 mm Raft Foundation (Bottom) : 75 mm Raft Foundation (Bottom) : 75 mm Raft Foundation (Side) : 75 mm Raft Foundation (Side) : 75 mm Beam : 25 mm Beam : 25 mm Strap Beam : 50 mm Strap Beam : 50 mm Column :40 mm Column :40 mm Slab : 15 mm Slab : 15 mm flat Slab : 20 mm flat Slab : 20 mm Staircase : 15 mm Staircase : 15 mm Retaining Wall : 20 Retaining Wall : 20 – – 25 mm 25 mm

Water Retaining Structures : 2 0- 30 mm Water Retaining Structures : 2 0- 30 mm

Maximum water absorption by bricks

Maximum water absorption by bricks – – 15% 15% Compressive strength of bricks

Compressive strength of bricks – – 3.5 N/mm2 3.5 N/mm2 Density Of Bricks- 1600-1920 Kg/m3

Density Of Bricks- 1600-1920 Kg/m3 Minimum thickness of slab

Minimum thickness of slab – – 125 mm 125 mm Dimension tolerance for cubes

Dimension tolerance for cubes – – +2 +2 Maximum free fall of concrete

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Lapping should not be used for the bars having larger dia than 36 mm. Lapping should not be used for the bars having larger dia than 36 mm. Binding wire required for steel reinforcement

Binding wire required for steel reinforcement – – 8 kg per MT 8 kg per MT 3 samples should be taken for every 100 m2 in core cutting test. 3 samples should be taken for every 100 m2 in core cutting test. Maximum chair spacing

Maximum chair spacing – – 1 m. 1 m.

Minimum dia should be used in dowels rod

Minimum dia should be used in dowels rod – – 12 mm. 12 mm. Hook for strriups (one side)

Hook for strriups (one side) – – 9D 9D

No. of strriups = (clear span/spanning) + 1 No. of strriups = (clear span/spanning) + 1

Length of main steel in cantilever anchorage

Length of main steel in cantilever anchorage – – 69D. 69D. Minimum no. of bars in square column

Minimum no. of bars in square column – – 4 4 Minimum no. of bars in circular column Minimum no. of bars in circular column – – 6 6

Minimum dia of main bars and distributors in the slab

Minimum dia of main bars and distributors in the slab – – 8 mm. 8 mm. Maximum dia of main bars and distributors in the slab

Maximum dia of main bars and distributors in the slab – – 1/8 of slab thickness. 1/8 of slab thickness. All reinforcement should be free from mill scales, loose rust, and coats of p

All reinforcement should be free from mill scales, loose rust, and coats of p aints, oil or any otheraints, oil or any other substances.

substances.

3. Setting Time:

Initial setting time should not be less than 30

Initial setting time should not be less than 30 minutes.minutes. Final setting time should not be greater than 10 hours. Final setting time should not be greater than 10 hours.

4. Required Curing Days:

Super sulfate cement

Super sulfate cement – – 7 days 7 days Ordinary portland cement

Ordinary portland cement – – 10 days 10 days Cement with minerals and admixtures

Cement with minerals and admixtures – – 14 days. 14 days.

5. Slump Value (IS-456):

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Lightly reinforced concrete: 25

Lightly reinforced concrete: 25 – – 75 mm. 75 mm. Heavily reinforced concrete: 75

Heavily reinforced concrete: 75 – – 100 mm. 100 mm. Trench fill : 100

Trench fill : 100 – – 150 mm ( for in-situ & tremie). 150 mm ( for in-situ & tremie).

6. Cube Samples:

1 1 – – 5 m3 : 1 No. 5 m3 : 1 No. 6 6 – – 15 m3 : 2 No.. 15 m3 : 2 No.. 16 16 – – 30 m3 :3 No. 30 m3 :3 No. 31 -50 m3 : 4 No. 31 -50 m3 : 4 No.

Above 50 m3 : 4 + 1 no. of addition for each 50 m3. Above 50 m3 : 4 + 1 no. of addition for each 50 m3.

Civil Engineering Requirements:

THESE ARE THE TOP 10 CIVIL ENGINEERING REQUIREMENTS

THESE ARE THE TOP 10 CIVIL ENGINEERING REQUIREMENTS TO BECOME ATO BECOME A SUCCESSFUL CIVIL ENGINEER:

SUCCESSFUL CIVIL ENGINEER:

1. Tests Of Building Materials:

A good civil engineer should

A good civil engineer should have proper knowledge of different tests of building materials.have proper knowledge of different tests of building materials. Some important tests are listed below.

Some important tests are listed below. Concrete Test

Concrete Test:: Slump test,Slump test,compression test, split tensile test, soundness etc.compression test, split tensile test, soundness etc.

Soil Test:

Soil Test: Core cutter test, compaction test,sand replacement test, triaxial test, consolidation test Core cutter test, compaction test,sand replacement test, triaxial test, consolidation test etc.

etc.

Bitumen Test:

Bitumen Test: Ductility test, softening point test, gravity test, penetration test etc. Ductility test, softening point test, gravity test, penetration test etc.

2. Investigation Of soil:

Various soil tests are conducted to determine the settlement and

Various soil tests are conducted to determine the settlement and stability of soils before starting astability of soils before starting a construction. So as a civil engineer, you should have enough knowledge of these tests which are construction. So as a civil engineer, you should have enough knowledge of these tests which are performed at the site.

performed at the site.

3. Uses Of Surveying Instruments:

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Usages of surveying instruments like the total station, theodolite etc

Usages of surveying instruments like the total station, theodolite etc is also a mandatoryis also a mandatory knowledge for every civil engineer. These

knowledge for every civil engineer. These instruments are used for marking and measurements.instruments are used for marking and measurements.

4. Standard Codes Used In Construction:

Every country has their standard safety specifications (eg: Is Code) for

Every country has their standard safety specifications (eg: Is Code) for construction relatedconstruction related works. All new construction should be done

works. All new construction should be done by following all the rules and procedures mentionedby following all the rules and procedures mentioned in the standard codes. Otherwise, chances of

in the standard codes. Otherwise, chances of failure of a structure will be always high.failure of a structure will be always high.

5. Bar Bending Schedule:

Bar bending schedule is an

Bar bending schedule is an essential chart for civil engineers. It provides the reinforcementessential chart for civil engineers. It provides the reinforcement calculation of RC beam such as cutting length, type of bending, the length of bending etc. calculation of RC beam such as cutting length, type of bending, the length of bending etc.

6. Drawing And Design:

Drawing and design are the primary ke

Drawing and design are the primary keys of an ongoing project. It provides ys of an ongoing project. It provides all the requiredall the required specifications of that project. Every site engineers should have the

specifications of that project. Every site engineers should have the analyzing power of suchanalyzing power of such drawings and designs.

drawings and designs.

7. Estimation and Bills:

Estimation and bills should be prepared by a civil engineer in a construction project. Estimation and bills should be prepared by a civil engineer in a construction project.

8. Quality Control:

Quality control ensures the profit of a project b

Quality control ensures the profit of a project by reducing the extra costs. So you must y reducing the extra costs. So you must have ahave a basic knowledge of quality control.

basic knowledge of quality control.

9. On Field Management:

Knowledge of form-work, concreting, safety measures etc is also a

Knowledge of form-work, concreting, safety measures etc is also a key aspect.key aspect.

10. Coordination With Labor:

What is 1 BHK, 2 BHK, 3 BHK (0.5 BHK)

etc. in a Flat layout?

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BHK:

Full form of BHK is

Full form of BHK is – – Bedroom, Hall & Kitchen Bedroom, Hall & Kitchen B means

B means – – Bedroom, Bedroom, H means

H means – – Hall/Living room, Hall/Living room,

K means

K means – – Kitchen. Kitchen.

1 BHK:

Full form

Full form – – 1 Bedroom, 1 Hall & 1 Kitchen 1 Bedroom, 1 Hall & 1 Kitchen

Explanation: Explanation:

1 Bedroom with 1 Hall & 1 Kitchen. 1 Bedroom with 1 Hall & 1 Kitchen.

Plan: Plan:

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2 BHK:

Full form

Full form – – 2 Bedrooms, 1 Hall & 1 Kitchen 2 Bedrooms, 1 Hall & 1 Kitchen

Explanation: Explanation:

2 Bedrooms with 1 Hall & 1

2 Bedrooms with 1 Hall & 1 Kitchen. Sometimes it is also defined as 1 MaKitchen. Sometimes it is also defined as 1 Master Bedroom (largerster Bedroom (larger than standard size) & 1 Small Bedroom, 1 Hall & 1 kitchen

than standard size) & 1 Small Bedroom, 1 Hall & 1 kitchen

Plan: Plan:

3 BHK:

Full form

Full form – – 3 Bedrooms, 1 Hall & 1 Kitchen 3 Bedrooms, 1 Hall & 1 Kitchen

Explanation:

Explanation: 3 Bedrooms with 1 Hall & 1 3 Bedrooms with 1 Hall & 1 KitchenKitchen

Plan: Plan:

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4 BHK:

Full form

Full form – – 4 Bedroom, 1 Hall & 1 Kitchen 4 Bedroom, 1 Hall & 1 Kitchen

Explanation:

Explanation: 4 Bedrooms with 1 Hall & 1 4 Bedrooms with 1 Hall & 1 KitchenKitchen

Plan: Plan:

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0.5 BHK: 0.5 BHK: Full form

Full form – – 0.5 Bedroom with 1 Hall & 1 Kitchen 0.5 Bedroom with 1 Hall & 1 Kitchen

Explanation

Explanation – – Bedroom smaller than the standard size. Bedroom smaller than the standard size. Normally they are recommended asNormally they are recommended as library or study room. But it can be used as bedroom.

library or study room. But it can be used as bedroom.

Plan:

Plan: Same as 1BHK just bedroom Same as 1BHK just bedroom size is smaller than standard size.size is smaller than standard size.

1.5 BHK:

Full form

Full form – – 1.5 Bedroom, 1 Hall & 1 Kitchen 1.5 Bedroom, 1 Hall & 1 Kitchen

Explanation

Explanation – – 1.5 indicates 1 bedroom (standard size) & 1 bedroom (0.5). 1.5 indicates 1 bedroom (standard size) & 1 bedroom (0.5).

Plan: Plan:

2.5 BHK:

Full form

Full form – – 2.5 Bedroom, 1 Hall & 1 Kitchen. 2.5 Bedroom, 1 Hall & 1 Kitchen.

Explanation

Explanation – – 2.5 indicates 2 bedrooms(standard size) & 1 bedroom (0.5) 2.5 indicates 2 bedrooms(standard size) & 1 bedroom (0.5)

Plan:

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1 RK:

Full form:

Full form: 1 Room & 1 Kitchen 1 Room & 1 Kitchen

Explanation:

Explanation: Studio Apartments have this types of layouts. Studio Apartments have this types of layouts. It has 1 room which is used as livingIt has 1 room which is used as living room & 1 kitchen.

room & 1 kitchen.

Plan: Plan:

2 BHK 2T:

Full form:

Full form: 2 Bedroom, 1 Hall, 1 Kitchen & 2 Toilets. 2 Bedroom, 1 Hall, 1 Kitchen & 2 Toilets.

Explanation:

Explanation: 2 Bedrooms, 1 Hall, 1 kitchen & 2 Toilets ( 1 common & 1 attached with master 2 Bedrooms, 1 Hall, 1 kitchen & 2 Toilets ( 1 common & 1 attached with master bedroom)

bedroom)

Plan: Plan:

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3 BHK 2T:

Full form:

Explanation:

Explanation: 3 Bedrooms, 1 Hall, 1 3 Bedrooms, 1 Hall, 1 kitchen & 2 Toilets ( 1 common kitchen & 2 Toilets ( 1 common & 1 attached with master& 1 attached with master bedroom)

bedroom)

Plan:

Plan: Same as 2BHK 2T With 2 Toilets. Same as 2BHK 2T With 2 Toilets.

3 BHK 3T:

Full form:

Explanation:

Explanation: 3 Bedrooms, 1 Hall, 1 kitchen & 3 Toilets ( 1 common & 1 attached with master 3 Bedrooms, 1 Hall, 1 kitchen & 3 Toilets ( 1 common & 1 attached with master bedroom).

bedroom).

Plan:

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Difference

Difference Among

Among Scaffolding, Shuttering,

Scaffolding, Shuttering,

Centering, Stagging

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Scaffolding:

Scaffolding is a temporary framework having platforms at different level of

Scaffolding is a temporary framework having platforms at different level of a structure whicha structure which enables the masons/labor for working at the height.

enables the masons/labor for working at the height. They are usually used for activities such asThey are usually used for activities such as plastering, painting, brickwork at heights etc. There are various types of scaffolding:

plastering, painting, brickwork at heights etc. There are various types of scaffolding: 1. Brick Layer / Single Scaffolding.

1. Brick Layer / Single Scaffolding. 2. Mason’s Or Double Scaffolding. 2. Mason’s Or Double Scaffolding.

3. Steel Scaffolding. 3. Steel Scaffolding.

4. Needle Or Cantilever Scaffolding. 4. Needle Or Cantilever Scaffolding. 5. Gantries. 5. Gantries. 6. Bamboo/Wooden Scaffold 6. Bamboo/Wooden Scaffold 3. Suspended Scaffolding. 3. Suspended Scaffolding.

Shuttering/Formwork:

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Formwork is a temporary structure used as a mold

Formwork is a temporary structure used as a mold in which fresh concrete are poured in which fresh concrete are poured to cast theto cast the members of the structure at the site. It is also known

members of the structure at the site. It is also known as falsework or shuttering. In the context ofas falsework or shuttering. In the context of concrete construction, the falsework supports the shuttering molds for exa

concrete construction, the falsework supports the shuttering molds for exa mple column sides,mple column sides, beam sides, slab side, wall side etc.

beam sides, slab side, wall side etc.

So, By their definitions, scaffolds are for supporting labor and materials and

So, By their definitions, scaffolds are for supporting labor and materials and act as workingact as working platforms. Formwork (Shuttering) acts

platforms. Formwork (Shuttering) acts as molds for pouring concrete.as molds for pouring concrete.

Centering:

Part of the formwork which supports the horizontal surface is

Part of the formwork which supports the horizontal surface is called centering for example slabcalled centering for example slab bottom, beam bottom etc.

bottom, beam bottom etc.

Staging:

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That portion which supports centering & shuttering is called

That portion which supports centering & shuttering is called Staging. This can be:Staging. This can be: 1.

1. Wooden BalliesWooden Ballies 2.

2. Pipes/Props/JacksPipes/Props/Jacks 3.

3. H framesH frames 4.