Civil Engineering

50 Practical Knowledge Every Civil Engineer Should Know

50 Practical Knowledge for Civil Engineers, we are going to discuss 50+ Civil engineering Knowledge, which every civil engineer must have to know. In the daily work schedule, we civil engineers are facing many problems from lack of knowing very basic things. We are going to share with you those basic technical things in a bunch.

1.What is the Height of a Single Storey Building?
Ans3.15 m
2.What is the volume of One bag cement?
Ans0.347 Cum or 1.25 Cubic feet.
3.What is the Weight of one bag cement?
Ans50 Kg
4.What is initial Setting time of Cement?
Ans30 min
5.Final Setting time of Cement for Ordinary Portland Cement is ?
Ans10 hours
6.What is the minimum nos of bar for a rectangular column?
Ans4 Nos
7. What is minimum nos of bar for circular column?
Ans6 Nos
8. What is the size of Concrete cube?
Ans150 x 150 x 150 mm
9How much layer needs to fill a concrete cube for testing?
Ans3 layers
10 How much layer needs to fill a slump for slump test?
Ans4 Layers
11.What is the Validity of use of Cement?
AnsIt is 3 months from Manufacturing
12.For which test Universal Testing Machine is used?
AnsCompression test of Concrete and Tensile test of reinforcement.
13.What is the minimum curing period for concrete?
Ans In normal Weather, it is seven days.
For Dry or Hot weather, it is 10 Days.
14.What is Deflection?
Ans Deflection means temporary displacement
15.What is deformation?
Ans Deformation is a permanent displacement.
16.What Is the formula for tensile strength of concrete?
Ans 0.7 route fck
17.Which grade of concrete are called Ordinary Concrete?
Ans M10 to M20 concrete are ordinary concrete.
18. Which grade of concrete are called Standard Concrete?
Ans M25 to M35
19. Which grade of concrete are called High Strength Concrete?
Ans M60 to M80
20.How much time required to mix concrete in a mixture machine?
Ans Minimum 2-3 min needs to mix concrete in a mixture machine.

50 Practical Knowledge for Civil Engineers In Hindi

21.Which dia meter of bar should be used for Chairs?
AnsMinimum 12 mm dia bar.
22.What is the Minimum Cover for Footing , Column, Slab and Beam?
Ans Minimum cover should be: Footing-50 mm, Column-40 mm,
Slab- 20 mm, Beam-25 mm
23.What is the ratio of most used cement concrete M10, M15, M20, M25?
Ans For M10-(1:3:6), M15-(1:2:4), M20-1:1.5:3, M25-(1:1:2)
The ratio is like Cement: Sand: Aggregates.
24.What is the minimum thickness of slab?
Ans Minimum thickness of slab should be 125 mm
25.How much water absorption is allowed for brick?
Ans Not more than 20 %
26.What is the minimum Diameter for dowels bar?
Ans Minimum 12 mm dia bar.
27.What is the minimum allowable PH value of water?
Ans It is not less than 6.
28. What is the lap length of bars for compression zone?
Ans 24 d
29.What is the lap length of bar for M20 Grade Concrete?
Ans For Column-45d, Beam-60d, Slabs -60d.
30.What is the lap length of bars for Tension zone?
Ans 50d to 60 d, d=dia of bar.
31. What is Segregation of Concrete? and why its caused?
Ans The separation of sand, cement, aggregates in concrete is called
Separation of Concrete.
Its caused due to improper water cement ratio.
Also caused for poured above 1.5 height.
32.What is the storage procedure of Cement?
Ans 1. Always store cement in a dry place.
2. Provide a gap of 300 mm from walls.
3. Never place cement bag direct in the floor always provide a 200 mm minimum
height from floor.
4. Never put more than 10 nos of bag in a stack.
5. Keep in mind never make a cement storage near chemically effected floor or
area and moisture effective area.
33.Calculations for no of stirrup in a abeam?
Ans Clear Span/ c/c Spacing+1
34.What is TMT?
Ans Thermomechanical Treated Bar.
35.What is TMX?
Ans Thermax Powered Bar.
36.What is SD?
Ans Super Ductile Bars.
37.What is HYSD?
Ans High Yield Strength Deformed Bars.
38.What is CTD?
Ans Cold Twisted Deformed Bar.
39.What is the angle of staircase flight?
Ans It is between 25 degree to 40 degree.
40What is the minimum and maximum height of riser for residential building?
Ans 150 mm to 200 mm
41. What is the minimum and maximum width of tread for residential building?
Ans 250 mm to 300 mm
42.What is the minimum Hook length for bars?
Ans It is 9D. (D-is dia of bar)
43.How much bricks needs for 1 Cum Brick of 230 mm brick wall /work?
Ans 496 Nos
44.How much bricks need for 115 mm thk brick work?
Ans 56 nos / Sqm
45. What is Bleeding in Concrete?
Ans When water comes out from a just made concrete or fresh concrete then it is
called bleeding of concrete
46. What is the maximum free fall for concrete?
Ans Maximum allowable height of concrete free fall is 1.5 m.
47.What is the Angle of hook in stirrups?
Ans 135 degree.
48.How much bars should be lapped in a bar bending zone?
Ans Not more than 50%
49.What is the volume of one bag cement?
Ans 0.0347 cum or 1.23 CFT
50.Calculations for weight of steel bars?
Ans (D^2 xL)/162

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Jyotirmay Maity is a B.Tech Civil Engineer with more than 8 years of experience in various Civil Engineering field i.e. Geosynthetics, Building Design, Road, Draftsmanship, and Project Management. He is the founder of this blog and his motto is to share his experiences with you. You can connect with him via mail to [email protected].

2 thoughts on “50 Practical Knowledge Every Civil Engineer Should Know

  • Subash chandra Jena

    Very very useful,

  • Nilesh Mandhare

    Very useful and good information Sir
    Thank you for helping.
    Please keep posting more mathematical calculations used in civil construction filed.


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