MCQ
1. The hydraulic mean depth or the hydraulic radius is the ratio of-
area of flow and wetted perimeter
wetted perimeter and the diameter of the pope
velocity of flow and area of flow
none of these
2. According to standard specifications the full strength of concrete is achieved after days-
7
14
21
28
3. The slump test of concrete is used to measure-
workability
homogeneity
impact
tensile strength
4. The vertical depth for a channel is given by (q=unit discharge through the channel)
(q/g)1/2
(q²/g
(q³/g) 1/4
none of these
5. A cantilever retaining wall should not be used for heights more than
4m
6m
8m
10m
6. A long column is one whose ratio of effective length to its least internal dimension exceeds-
5
10
12
20
7. The modules of elasticity for 400 (60 grade) is approximately equal to-
214 kn/mm²
274 kn/mm²
314 kn/mm²
414 kn/mm²
8. The thickness of slab not be less then
100 mm
125 mm
200 mm
none of these
9. For reinforced cement concrete lintels and slabs the nominal size of coarse aggregate should not exceed-
10 mm
15 mm
20 mm
40 mm
10. The under weight of hard rock is-
2400 kg/m³
2500 kg/m³
2600 kg/m³
2700 kg/m³
11. The unit bearing capacity of footing in sand-
decreases with depth of footing
decreases with width of footing
increases with depth of footing
increases with width of footing
12. The shear force of a simply supported beam of length 'l' carrying a uniformly distributed load OD w per unit length is-
0
w1/4
w1/2
w¹ 1
13. The maximum water cement ratio for durable concrete is-
0.2
0.4
0.6
0.8
14. The top diameter and height of the mould used for slump test respectively-
100 mm, 200 mm, 300 mm
200 mm, 100 mm, 300 mm
100 mm, 300 mm, 200 mm
200 mm, 300 mm, 100 mm
15. The frictional resistance of a pope varies approximately with- of the liquid.
pressure
velocity
square of velocity
cube of velocity
16. The chief ingredient of paint is-
alcohol
oil
drier
pigment
17. The bending moment on a section is maximum where shear force is-
minimum
maximum
changing
zero
18. The spacing of vertical stirrups in a rectangular beam is-
maximum near the supports
minimum near the supports
maximum near the center
minimum near the center
19. The continuous strain, which the concrete undergoes due to application of external loads, is called-
workability
bleeding
segregation
creep
20. The number of bags of cement required per cubic meter of 1:1.5:3 approximately. concrete will be
3 to 4
4 to 5
5 to 6
6 to 8