# 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.

40Âº

#
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.

Download 50 Important Civil Engineering Interview Q&A PDF