Civil engineering interview question

1. civil engineering interview
question 2022

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1.Name various authorities or workers on a construction site?
1.Senior Engineer/Project manager
2.Site Engineer
3.Contractor
4.Mistri
5.Mason/labor
2.What is least cover provided for different RCC Members?
1.Footing = 50 mm
2.Column = 40mm
3.Beam = 25mm
4.Slab = 20mm

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3.What are the functions of column in a building?
Column is a vertical member in building whose primary function is to
support structural load and transfer it through beams. Upper columns
transfers the load to the lower columns and finally to the ground
through footings.
4.What is the cement sand & aggregate ratios for various grades of
concrete mix?
1.M10 – 1:3:6
2.M15 – 1:2:4
3.M20 – 1:1.5:3
4.M25 – 1:1:2
5.M30 – 1:1:1

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5.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.
6.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.
7.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 max. For
masonry cement it shouldn’t exceed 24hours.

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8.What are common methods of curing the concrete?
•Spraying
•Wet covering of Surface
•Ponding
•Application of curing chemicals
•Steam curing
9.What is the formula for weight of steel?
Weight of steel in kg can be calculate by formula (D2*L)/162; where D
is diameter of steel bar in millimeter and L is total length of steel bar
in meter.
10.What do you know about “TMT”?
TMT stands for “Thermo Mechanically Treated”. 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.

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11.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 up to elastic limit. Whereas, limit state
method is a plastic design method in which structure is designed to
bear the load beyond plastic limit.
12.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.
13.What are the types of foundation used in construction?
There are basically two types of foundation: Shallow & Deep
foundation. Again shallow foundation can be classified as spread
footing, combined footing, strap or cantilever footing and finally mat
or raft footing. Deep foundations can be classified as pile footing,
pier footing, caissons footing and well foundation.

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14.What are the types of cement?
There are various types of cement which are: Ordinary Portland Cement
(OPC), White Portland Cement (WPC), Portland Pozzolana Cement
(PPC), Low Heat Portland Cement, Coloured Portland Cement,
Hydrophobic cement, Rapid Hardening Cement, Portland Slag Cement,
Sulphates resisting Portland Cement, etc.
15.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/cm2. It is a highly effective process for repairing
concrete walls or damaged surfaces.
16.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.

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17.What are various tests for checking brick quality?
We can use water absorption test, hardness test, shape & size,
crushing strength test, soundness test, etc. to check the brick quality.
In water absorption test, we dip the brick for 16 hours in water. If
weight of brick after dipping in water doesn’t exceed by 20%, it can
be considered as first class brick, if below 22.5% it can be considered
as second class brick, if below 25% it can be considered as third class
brick. In crushing test, it crushing strength should be minimum of 10
N/mm2 for first class brick, 7.5 N/mm2 for second class bricks. In
hardness test, we scratch the brick with nails. It should be scratch
free. In soundness test we check the metallic sound by striking two
bricks with each other.
18.What is void ratio?
Void ratio is the ratio of volume of voids to volume of solids.