Civil Engineering Interview Quiz – Part 3 | Final 21–30 Questions with Answers

Civil Engineering Interview Questions - Part 3

21. What is the typical diameter of main bars in a slab?

8 mm
10 mm
12 mm

22. Which test checks the soundness of cement?

Vicat Test
Le Chatelier Test
Slump Test

23. What is the minimum grade of concrete for RCC as per IS 456?

M15
M20
M25

24. What is the purpose of aggregate in concrete?

Reduce shrinkage
Provide strength
Reduce cost

25. What is the weight of 12mm steel per meter?

0.89 kg
1.12 kg
1.58 kg

26. What is the angle of repose used for?

Compaction
Soil shear strength
Slope stability

27. What is the maximum free fall of concrete as per IS code?

1.5 m
2.0 m
3.0 m

28. Which test is used for determining fineness of cement?

Sieve Test
Soundness Test
Impact Test

29. What is the ratio of water to cement for M20 concrete?

0.50
0.60
0.65

30. What does the term "bleeding" in concrete mean?

Loss of water
Separation of water on top
Rapid setting