50 Important Civil Engineering Interview Q&A
1. How Do You Calculate Concrete Volume?
Concrete volume is calculated by multiplying its length, width, and
thickness. For example, 1m x 1m x 1m = 1 m3 of concrete volume.
2. What is the purpose of the concrete cover for reinforcement?
Concrete reinforcement covers are required to protect the rebar from
corrosion and to provide fire resistance.
3. How Do You Check The Level On A Construction Site?
I'll use the Spirit Level, Dumpy Level, and Leveling Pipe to check the
level on the construction site.
4. How Reliable Is the Dumpy Level?
We can take a 5 mm accurate or minimum reading with the help of a dumpy
level.
5. How Do You Determine The Weight Of 12m Long And 10mm Diameter Steel
On-Site?
It is straightforward,
By multiplying the steel bar's length by its unit weight (unit wt of 10mm
= 0.60 kg/m),
Steel weight = 0.60 x 12 = 7.2 kg
6. What equation is used to calculate the unit weight of the steel bar?
(D2/162) is an equation used to determine the unit weight of a steel
bar.
7. What Size Is A Concrete Cube?
A concrete cube's standard dimensions are 15 cm x 15 cm x 15 cm.
8. What Should You Do If A Concrete Cube Fails The Compressive Strength
Test After 28 Days?
If the concrete cube fails the strength test, I will conduct a core
cutter test on it and report back to higher authorities.
9. What is the concrete mix ratio for M – 20 grade?
The Mix ratio for M20 is 1: 1.5: 3.
10. What Are the Steps in Building Construction?
Building construction involves several steps, including,
Masonry work in concrete
Plastering tasks
Formwork for flooring
Bending and cutting steel
Plumbing and Electrical Services
11. What is the weight per unit of 12 mm steel bars?
0.89 g/m
12. What is the steel density?
7850 kg per m3
13. The number 415 in Fe – 415 Steel Grade denotes the of Steel.
Tensile Strength
14. What is the volume of a 50 kg cement bag?
0.03 m3
15. What is the average stair width in a residential building?
900 millimetres
16. The Stair Slope Should Not Exceed.
40º
17. Steel column minimum diameter
12 millimetres
18. What is the standard brick size?
Size: 19 cm x 9 cm x 9 cm
19. What is the RCC unit weight?
2500 kg per m3
20. One acre equals ___________ square feet.
43560 square feet
21. What is the full spelling of UTM?
Universal Testing Equipment
22. When does cement expire?
three months
23. Is one square metre equal to ________ square feet?
10.76 square feet
24. What is the unit weight of 25 mm steel bars?
3.85 kg per metre
25. One acre equals one hectare.
2.47 hectares
26. One gallon is equal to ________litres.
3.78 gallons
27. A kilonewton equals ________ kilogrammes.
101.97 kilogrammes
28. A tonne equals ________ kilogrammes.
1 tonne
29. What is the maximum allowed free fall of concrete?______?
1.5 metres
30. What is the name of the instrument used for levelling on a construction
site?
Level Dumpy
31. The minimum number of bars in a circular column should be_______.
6 pcs.
32. What is AAC's Full Form?
Aerated Concrete in an Autoclave
33. What is the full name of NDT?
Non – Destructive Evaluation
34. What does JCB stand for?
Bamford, Joseph Cyril
35. Which test is used to determine soil bearing capacity?
Plate Load Experiment
36. Which construction material is subjected to ring and ball testing?
Bitumen
37. What is the minimum hook length required by the IS Code?
75 mm
38. What is the reason for the extra length in bent up bars?
0.45
39. What is Dumpy's lowest count?
5mm
40. What exactly is Full of EGL?
The current ground level.
41. A first-rate brick should absorb more water than?
a percentage of 20%
42. How many bricks are used in one cubic metre of brickwork?
500 pcs.
43. What is the typical consistency of Portland cement?
a quarter
44. Expansion in Portland cement is measured by...
Test for Stability
45. According to the IS Code, full concrete strength is achieved after?
28 days.
46. How much cement does one bag contain?
0.03 m3
47. What is the minimum grade of concrete used for RCC?
20 – M
48. When Does Cement Expire?
Three months
49. What is DPR's Full Form?
Comprehensive Project Report
50. What is the initial and final cement setting time?
Initially: less than 30 minutes and 600 minutes.
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