CIVIL QUIZ

1. A rectangular beam of length I supported at its two ends carries a central concentrated load W at its centre. The maximum deflection occurs

At the ends

At 1/3 from both ends

At the mid span

At 1/4 from both ends

2. A common footing provided for two columns is called a

Mat foundation

Raft foundation

Combined footing

Common foundation

3. For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine's theory

Is always less than 1

Is always greater than 1

Can be more than 1

Can be less than 1

4. The modulus of elasticity of steel is

150 KN/mm^2

200 KN/mm^2

250 KN/mm^2

275 KN/mm^2

5. A fixed beam of span L carries a central point load W.The maximum sagging bending moment in the beam is

WL/2

WL/4

WL/8

WL/16

6. The ratio of maximum shear stress and average shear stress for a rectangular section is

1.5

2

2.5

3

7. Which of the following has highest coefficient of discharge

Sharp edged orifice

Venturimeter

Borda's mouth piece running free

Cippoletti weir

8. In any beam when the moment of inertia about the neutral axis is doubled, its deflection is

Doubled

Tripled

Halved

Minimum

9. The fitness modulus of the fine aggregate is in the range of

2.0 to 3.5

3.5 to 5.0

5.0 to 7.0

6 to 8.5

10. The minimum cover in a slab should neither be less than the diameter of bar nor less than

10 mm

15 mm

20 mm

13 mm

11. The slab is designed as one way if the ratio of long span is

Less than 1

Between 1 and 1.5

Between 1.5 and 2

Greater than 2

12. Cube strength of controlled concrete to be used for pre-tensioned and post-tensioned work respectively should not be less than

350 Kg/cm^2 and 420 Kg/cm^2

420 Kg/cm^2 and 530 Kg/cm^2

420 Kg/cm^2 and 350 Kg/cm^2

530 Kg/cm^2 and 420 Kg/cm^2

13. Direct run off is the sum of

Surface run off and mass flow

Base flow and ground water run off

Deployed sub surface run off and deep percolation

Surface run off and interflow

14. Number of rivets required in a joint is

Load/shear strength of a rivet

Load/bearing strength of a rivet

Load/tearing strength of a rivet

Load/rivet value

15. The relation between modulus of rupture Fcr and characteristic strength of concrete Fck is given by

Fcr = 0.35 S Fck

Fcr = 0.5 S Fck

Fcr = 0.7 S Fck

Fcr = 1.2 S Fck

16. The number of rivets for connecting a strut to a gusset plate shall not be less than

2

3

4

5

17. To minimize the effect of differential settlement, the area of footing should be designed for

Dead load only

Dead load + live load

Dead load + fraction of live load

Live load + fraction of dead load

18. If the depth is kept constant for beam of uniform strength then its width will vary proportional to .

M

Sqrt(M)

M^2

M^3

19. A reduction factor Cr, load carrying capacity of a long columns is given by

Cr = 1.25 - Le/24b

Cr = 1 - Le/48b

Cr = 1.25 - Le/48b

Cr = 1.5 - Le/48b

20. In limit state design of concrete for flexure, the area of stress block is taken as

0.36 Fck Xu

0.42 Fck Xu

0.446 Fck Xu

0.53 Fck Xu

21. Ratio of compressive strength to tensile strength of concrete

Increases with age

Decreases with age

Remains constant

None of the above

22. The longitudinal stress in a thin cylindrical shell is

Pd/4t

Pd/2t

Pt/4d

Pt/2d

23. According to IS:456-1978, the maximum reinforcement in a column is

2%

4%

6%

8%

24. When a beam deflects into a uniform strength then its width will vary proportional to

I/2R

I/8R

I^2 /8R

I^2 /2d

25. ML^-1 T-2 is the dimension of

Force

Pressure

Energy

Power

26. The limits of percentage of the longitudinal reinforcement in a column is given by

0.15% to 2%

0.8% to 4%

0.8% to 6%

0.8% to 8%

27. For bars in tension a standard hook has an anchorage value equivalent to a strength length of

8

12

16

24

28. The compressive strength of 100 mm cube as compared to 150 mm cube is always

Less

More

Equal

May be any of the above

29. If the permissible stress in steel in tension is 140 N/mm^2, Permissible stress in concrete in bending compression is 5N / mm^2. Then the depth of neutral axis for a singly reinforced rectangular balanced section will be

0.35 d

0.40 d

0.45 d

Dependent on grade of concrete also