Structural Design Online Test – Paper 2

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Vikash chaudhary

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Total Questions: 30
Time Allotted: 30 minutes
Passing Score: 50%
Randomization: Yes
Certificate: No
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1 / 30

1. The minimum cover in a slab is neither less than the diameter of the bar nor less than

a) 15 mm

b) 20 mm

c) 25 mm

d) 30 mm

2 / 30

2. A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth is

a) 2

b) 2.5

c) 3

d) 3.5

3 / 30

3. The maximum spacing between longitudinal bars in a column is

a) 200 mm

b) 300 mm

c) 400 mm

d) 500 mm

4 / 30

4. The ratio of diameter of reinforcing bars and the slab thickness is

a) 1/5

b) 1/6

c) 1/7

d) 1/8

5 / 30

5. As the size of the cube increases, the strength of the cube

a) decreases

b) increases

c) increases but decreasing rate

d) decreases but decreasing rate

6 / 30

6. Shrinkage in concrete increases its

a) tensile strength

b) flexural strength

c) bond strength

d) shear strength

7 / 30

7. The minimum vertical spacing of the main bars in an RCC beam should be

a) diameter of the bar or maximum size of the aggregate + 5mm

b) maximum size of the bar

c) maximum size of the bar or 2/3 maximum size of the aggregate

d) none of the above

8 / 30

8. The anchorage value of the standard hook is taken as 16 times the diameter of the reinforcing bar if the angle of the bend is equal to

a) 30°

b) 40°

c) 180°

d) any of the above

9 / 30

9. The ultimate tensile strength of structural mild steel is about

a) 160 N/mm²

b) 260 N/mm²

c) 520 N/mm²

d) 420 N/mm²

10 / 30

10. If the slenderness ratio for a column is 100 then the column is said to be

a) long

b) medium

c) short

d) none of the above

11 / 30

11. The workability of concrete can be improved by

a) more sand

b) more cement

c) more fine aggregate

d) fineness of coarse aggregate

12 / 30

12. The maximum strain in the tension reinforcement in the section of a flexural member at failure shall not be less than (if fy is the characteristic strength of steel and Es is the modulus of elasticity of steel)

a) 0.0020

b) fy/(1.15Es) + 0.002

c) fy/(1.15Es) + 0.003

d) 0.0300

13 / 30

13. A rib slab is provided for

a) plain ceiling

b) acoustic insulation

c) heat insulation

d) all of the above

14 / 30

14. Addition of sugar in concrete results in

a) increase in setting time by about 1 hr

b) increase in setting time by about 4 hr

c) decrease in setting time by about 1 hr

d) decrease in setting time by about 4 hr

15 / 30

15. Singly reinforced beam & doubly reinforced beam are decided based on

a) bending moment

b) shear force

c) bending moment & shear force

d) none of the above

16 / 30

16. Due to shrinkage stress, a simply supported beam having reinforcement only at the bottom tends to

a) deflect downward

b) deflect upward

c) deflect upward or downward

d) none of the above

17 / 30

17. Modulus of elasticity for concrete improves by

a) age

b) higher w/c ratio

c) shorter curing period

d) all of the above

18 / 30

18. In the working stress design, the allowable bending compressive strain in RCC is

a) 0.003

b) 0.0003

c) 0.002

d) none of the above

19 / 30

19. In a singly reinforced beam, if the concrete is stressed to its allowable limit earlier than steel, the section is said to be

a) over-reinforced section

b) under-reinforced section

c) balanced section

d) economical section

20 / 30

20. Concrete gains strength due to

a) chemical action of cement with coarse aggregate

b) hydration of cement

c) evaporation of water

d) all of the above

21 / 30

21. In R.B. slab, the permissible compressive stress in bricks is generally taken as

a) 10 kg/cm²

b) 20 kg/cm²

c) 30 kg/cm²

d) 40 kg/cm²

22 / 30

22. Minimum embedment of reinforcement in a concrete flexural member should be

a) 30 θ

b) 40 θ

c) 50 θ

d) 60 θ

23 / 30

23. Bond strength of HYSD bar as compared to plain bar is more by

a) 20%

b) 30%

c) 40%

d) 60%

24 / 30

24. A doubly reinforced beam is economical as compared to a singly reinforced beam because

a) the size of the section is small

b) the depth of the section is small

c) compressive steel is under-stressed

d) concrete is not stressed to its full value

25 / 30

25. Presence of oils in water for concreting

a) improves strength

b) gives more slump

c) reduces workability

d) reduces strength

26 / 30

26. Strength of concrete increases with

a) increase in water cement ratio

b) decrease in water cement ratio

c) decrease in size of aggregate

d) decrease in curing time

27 / 30

27. The strength and quality of concrete depends on

a) aggregate shape

b) aggregate grading

c) surface area of the aggregate

d) all of the above

28 / 30

28. By over-reinforcing a beam, the moment of resistance can be increased not more than

a) 10%

b) 15%

c) 20%

d) 25%

29 / 30

29. Unsoundness of cement due to magnesia can be determined by

a) autoclave test

b) Vicat's needle

c) Le Chatelier's apparatus

d) normal consistency

30 / 30

30. Laps in bars are equal to

a) bond length

b) twice bond length

c) 1.5 to twice bond length

d) none of the above

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Structural Design Online Test – Paper 2

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