After completing your degree,every civil engineer has made a mindset to prepare and sit in an interview.During an interview,there are lots of candidates who have applied for the particular post and you are on among them.Firstly,you have to be confident and mentally stable.Being lazy is not a good thing.I will tell you that most probably somebody who has interviewed from many years will not only see your skills but that person will check your presence of mind with tricky and out of box elements.If you meet the required skills of the interviewer,then you are really the one to be hired.
In this article, I will give a briefing regarding the important questions that are asked in civil engineering during an interview.So my dear civil engineer’s you must go through these questions that are as follows:-
Q1. What is the function of Column in the building?
Column is a vertical member of a building that
support structural load transferred by the whole structure through Beams. After
that column transfers the load to the Footing and finally Footing transfers the
load to the land.
Q2. When the possibility of Segregation of concrete
is more?
a) When the water-cement ratio is high,
b) If the ratio of coarser aggregate is much more
than the other proportion,
c) Coarser grading
Q3. What is the least cover provided for different RCC
members?
Footing – 50 mm,
Column – 40 mm,
Beam – 25 mm,
Slab – 20 mm.
Q4. What is the full form of TMT bar?
Thermo Mechanical Treatment.
Generally we use TMT
bars and sheet for construction purposes for the reason that they have high
strength and high corrosion resistance compared to normal steels.
Q5. What do you mean by Honeycomb in Concrete?
Honeycomb means Void. It is also known as Air
Pocket.
Q6. What are Deflection and Deformation?
Deflection is temporary displacement whereas
Deformation is permanent displacement.
Q7. What are the methods of curing?
a) Spraying,
b) Wet
covering of a surface,
c) Ponding,
d)
Application of curing compound,
e) Steam
curing.
Q8. What is the formula for weight of steel?
Weight of steel in kg can be calculate by formula
(D^2*L)/162; where D is diameter of steel bar in millimeter and L is total
length of steel bar in metre.
Q9.What is difference between working stress method
and limit state method?
Working stress method is an elastic design method in
which structure is designed to bear the load upto elastic limit. Whereas, limit
state method is a plastic design method in which structure is designed to bear
the load beyond plastic limit.
Q10. What is guniting?
It is a process in which mixture of cement &
sand in proportion of 1:3 is shooted on concrete surface with the help of
cement gun under pressure of 2 to 3 kg/c㎡. It is a highly effective
process for repairing concrete walls or damaged surfaces.
Q11. What is the initial and final setting time of ideal
cement mix?
Initial setting time for ideal cement mix is around
30 minutes for almost all kind of cements. For masonry cement it can be
90minutes. Final setting time of ideal cement mix should be 10 hours at maximum.
For masonry cement it shouldn’t exceed 24 hours.
Q12. Does Water damage concrete?
Plain concrete is not affected or damaged by water
but Reinforced Concrete (RCC) can be damaged due to water. This is because the
water may seep into the concrete and corrode the steel reinforcement inside.
Q13. What is the cement sand & aggregate ratios
for various grades of concrete mix?
• M10 –
1:3:6
• M15 –
1:2:4
• M20 –
1:1.5:3
• M25 –
1:1:2
Q14. What field tests are required for quality check of
cement?
Quality of cement can be checked with color,
physical properties, etc. Cement should have grey color with light greenish
shade. It should feel smooth when rubbed between fingers. If hand is inserted
in a heap of cement or its bags, it should feel cool. When pinch of cement is
thrown in Water then cement should float for some time before it sink. Also, it
should be lump free.
Q15. What is the function of sand in mortar?
The main role of sand (aggregate) in mortar or
plaster is to provide core strength, but it has other benefits too. If water is
mixed with binder without adding sand to the mixture, both compressive and
tensile strength of the mixture would be drastically lower than in mixture with
added sand. It also helps to prevent mortar shrinkage, increases density and
helps in setting.
Q16. What the steps involved in Building Construction?
There are different steps involved in Building
construction such as:
1. Concreting.
2. Masonry
work.
3. Plastering
work.
4. Flooring
work.
5. Formwork.
6. Steel
cutting and Bending.
Q17.What is the accuracy of the dumpy level or minimum reading we can take?
With the help of a dumpy level we can take up
5mm accurate reading or minimum reading.
Q18. What is the size of a concrete cube?
15 cm x 15 cm x 15 cm
Q19. What do you do if any concrete cube fails in 28 days compressive strength test?
If the concrete cube fails in strength test, conduct a core cutter test on concrete and send a report to higher authorities.
Q20. In Residential Building, Average Value of Stair Width?
900 mm
Q21. The Slope of Stair Should not Exceed.
40º
Q22. Minimum diameter of steel in Column.
12 mm
Q23.Standard Size of Brick?
19 cm x 9 cm
x 9 cm
Q24. What is Unit Weight of RCC?
2500 kg/ m³
Q25. One Acre = ____________Sq. ft.
43560 Sq. ft.
Q26. What is the Full Form of UTM?
Universal
Testing Machine
Q27. Cement Expire After?
3 months
Q28. One square meter = _________ Sq. ft?
10.76 Sq. ft
Q29. What is unit weight of 25 mm Steel Bars
3.85 kg/m
Q30. One Hectare = _______Acres
2.47 Acres
Q31. One Gallon = ________Liters
3.78 Liters
Q32. One kilonewton is equal to _________ kilograms
101.97 KG
Q33. One Tonne is equal to _________ kilograms
1000 KG
Q34. Maximum Free fall of concrete allowed is:-
1.5 m
Q35. Minimum Bars in Circular Column Should
be:-
6 Nos.
Q36. What is the Full Form of AAC?
Autoclaved
Aerated Concrete
Q37. What is the Full Form of NDT?
Non –
Destructive Test
Q38. What is the Full Form of JCB?
Joseph Cyril
Bamford
Q39. Which
Test is conducted to determine the bearing capacity of Soil?
Plate Load
Test
Q40. Ring and ball test is conducted on which
construction material?
Bitumen
Q41. Minimum hook length as per IS Code?
75 mm
Q44. What is the extra length in Bent up bars?
0.45x
Q45. What is Least Count of Dumpy?
5mm
Q46. What is Full of EGL?
Existing ground level.
Q47. A First Class Brick Should Absorb Water More
than?
20 %
Q48. Number of Bricks used in 1 Cubic meter of
Brickwork?
500 Nos.
Q49. The Normal Consistency of Portland Cement?
25 %
Q50. The Expansion in Portland cement is tested by:-
Soundness
Test
Q51. According to IS Code, Full Strength of Concrete
is achieved after?
28 Days
Q52. What is the Volume of 1 bag of cement?
0.035 ㎥
Q53. Minimum Grade of Concrete Used For RCC?
M – 20
Q54. What is the Full Form of DPR?
Detailed
Project Report
Q55. As per UK gallon, 1 Gallon equals how much liters?
4.54 Litres
Q56. In one way slab, the Main bar is provided along
which span?
Shorter span
Q57. How we can measure the thickness of the
Plaster?
Bull mark is provided at a specific distance to make
sure that the required thickness of the Plaster is uniform throughout.
Q58. In plastering, What is known as 2nd coat?
Floating coat
Q59. What is the specific gravity range of Bentonite
slurry during Piling?
1.05 to 1.12
Q60. What is the working load?
The load assigned to a pile as per design
Q61. What is the use of the Damp Proof Course?
It prevents moisture from rising up the wall from
the ground.
As per IS 2911, Part – 1, Section – 2, Piles of 600
mm or less in diameter are called small diameter pile and Piles greater than
600 mm in diameter are called large diameter pile.
Q63. What is Friction Pile?
If the pile supports the load primarily by friction
along its surface, then it is called Friction Pile.
Q64. How much CFT in 1 bag of Cement (50 KG)?
1.225 Cubic Feet
Q65. What are the factors affecting the strength of
concrete?
Quality of Raw Materials, Water – Cement Ratio,
Coarse – Fine aggregate ratio, Aggregate – Cement ratio, Curing period,
Temperature, Compaction of concrete.
Q66. What is the density of Ice?
920 Kg per Cubic meter.
Q67. What is a One-way slab?
Answer: If the ratio of Longer Span to Shorter Span
is more than or equal to 2, then it is known as One way Slab.
Q68. What is a Two-way Slab?
If the ratio of Longer Span to Shorter Span is less
than 2, then it is called a Two-way slab.
Q69. What is Kentledge?
It is a dead weight used for applying a test load on
a pile.
Q70. What is the reinforcement criteria for the
beam?
As per 13920: 2016 Cl. 6.2.1, Beam shall have at
least two numbers 12 mm dia bar each at the top and bottom faces.
Q71. What is the percentage of water we can increase
for every 25 mm slump?
As per IS 10262: 2009 Cl. 4.2, We can increase 3%
for every additional 25 mm slump.
Q72. What is the Contour Line?
A line joining points of equal elevation is known as
a Contour Line.
Q73. What is the least count of theodolite?
The difference between the value of the smallest
division of the main scale and that of the smallest division of the vernier
scale known as the least count of the theodolite. It is the least value that
can be measured by theodolite.
Q74. What is the standard thickness of Ceiling Plaster?
6 mm
Q75. What are the factors on which Development
Length Depends?
Grade of Concrete, Grade of Steel
Q76. What is the purpose of Frog in Brick?
It helps in developing a proper joint between Brick
and mortar.
Q77. Which steel is used in the manufacture of
rails?
Manganese Steel
Q78. What type of cement is preferable in seawater
construction?
Slag or Pozzolana (PSC or PPC) as per IS 456 : 2000
Cl. 8.2.8
Q79. What should be the pH of water used in
concrete?
As per IS 456: 2000 Cl. 5.4.2, pH of water shall be
not less than 6
Q80. How to convert N/mm2 to Kg/c㎡?
Multiplying by 10.197
Q81. What is the minimum lap length taken in the
Compression zone?
As per IS 456: 2000 Cl. 26.2.5.1(d), the lap length in
compression shall not be less than 24ᶲ, where ᶲ is the diameter of the bar.
Q82. When bars of two different diameters are to be
lapped, then lap length will be calculated on the basis of which dia?
As per IS 456: 2000 Cl. 26.2.5.1(e), the lap length
shall be calculated on the basis of the diameter of the smaller bar.
Q83. When we will provide side face reinforcement in
the beam?
As per IS 456: 2000 Cl. 26.5.1.3, When the depth of
the web in a beam exceeds 750 mm, side face reinforcements shall be provided
along with the two faces.
Q84. What do you mean by the term ‘Topographical
Map’?
A map that shows the natural features of a
country such as Rivers, Hills, Road, Railways, Villages, Towns etc, is known as
Topographical Map.
Q85. What is the working principle of surveying?
The fundamental principle of surveying is to
work from the whole to the part.
Q86. In a chaining operation, Who is the Leader and who is the Follower?
The chainman at the forward end of the chain
who drags the chain is known as the leader. The one at the rear end of the
chain is known as a follower.
Q87. What is the density of fire bricks?
The density of fire bricks is 2400 kg/㎥
Q88. What is the minimum curing period for Mineral and Admixture added Cement?
The minimum curing period for Mineral and
Admixture added Cement is 14 days.
Q89. What is the fundamental difference between Surveying and Levelling?
In Surveying, the measurements are taken in
the horizontal plane, but in levelling they are taken in the vertical plane.
Q90. What is the meaning of Bored Cast in Situ?
Bored cast-in-situ pile is formed within the
ground by excavating or boring a hole within it, with or without the aid of a
temporary casing (to keep the hole stabilized) and subsequently filling it with
plain or reinforced concrete. These piles are particularly applicable in
certain subsoil conditions where penetration to a pre-determined depth is
essential.
Q91. How many ranging rods are required to range a
line?
At least three ranging rods are required for
direct ranging and at least four for indirect ranging.
Q92. In plastering, what is known as 1st coat?
Undercoat.
Q93. What is Bentonite?
It is a Montmorillonite clay with a very
high liquid limit.
Q94. What is the meaning of M50?
Here ‘M’ stands for ‘Mix’. 50 stands for
Characteristics compressive strength of concrete cube size 150 mm x 150 mm x
150 mm, after 28 days curing. Its unit is
Q95. Difference between Development length & Lap
Length?
Lap length addresses the length of the bar
needed to transfer the stress to the other bar, whereas Development length
addresses the length of the bar needed to transfer the stress to the concrete.
Q96. Which instrument is used to measure Specific
Gravity?
Hydrometer
Q97. What is the size of the mould used to measure
the compressive strength of Cement?
As per IS 10080: 1982, The size is 70.6 mm x
70.6 mm 70.6 mm
Q98. What is the percentage strength of concrete
with time?
After 1 day – 16%,
After 3 days – 40%,
After 7 days – 65%,
After 14 days – 90%,
After 28 days – 99%
Q99. What is the use of the Cover block?
Answer: It protects the reinforcement from thermal
expansion during a fire or excessive heat. It also protects the steel from
corrosion
Q100. What is the minimum height of the Parapet
wall?
1 metre
The purpose of this article was to give a certain reference and guide for the freshers after going to give their first interview in civil engineering field.The above questions and answers provides a simple and fast learning reference for site engineers as well.
Give your positive feedback and suggest more points that are asked in an interview in comment section below. - Civil Engineering Realities
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