Structural Design Specifications Civil Engineering Questions and Answers - ObjectiveBooks

Practice Test: Question Set - 10

1. The reinforcing bars in beams are not bundled in contact if the diameter of the bars, exceeds
(A) 12 mm
(B) 35 mm
(C) 30 mm
(D) 36 mm

2. The minimum thickness of the web plate for a crane gantry plate girder with a lifting load exceeding 15 tonnes, is
(A) 4 mm
(B) 5 mm
(C) 6 mm
(D) 8 mm

3. The anchorage value of standard U-type hook of a reinforcing bar of diameter d in tension, is
(A) 4 d
(B) 8 d
(C) 12 d
(D) 16 d

4. As per IS : 1982, the permissible axial tension in rolled I-beams and channels, is
(A) 1500 kg/cm2
(B) 1800 kg/cm2
(C) 1400 kg/cm2
(D) 1420 kg/cm2

5. The ratio of minimum compressive strength on 15 cm cubes prepared with the concrete of M 20 grade and M 40 grade, at 7 days should be at least
(A) 1/3
(B) 1/2
(C) 3/2
(D) 2.0

6. For concreting of shallow sections with vibration, the work ability of concrete should be
(A) Very low
(B) Low
(C) Medium
(D) High

7. The approximate value of torsion constant k for a box of depth d, width b, and having uniform thickness t, is
(A) 2dbt/(d + b)
(B) 2d2b2t/(d + b)
(C) 3d2b2t/(d + b)
(D) 3dbt/(d2 + b2)

8. For all practical purposes, the modulus of elasticity of steel is assumed
(A) 200 kN/mm2
(B) 225 kN/mm2
(C) 250 kN/mm2
(D) 275 kN/mm2

9. The value of fbct in the formula t = √[3W/ fbct (A2 - B2/4)] for calculating the thickness of a Rectangular base, according to IS : 800-1982, is
(A) 1500 kg/cm2
(B) 1650 kg/cm2
(C) 1800 kg/cm2
(D) 1890 kg/cm2

10. For nominal mix concrete M 20, the required quantity of water per 50 kg. of cement, is
(A) 60 liters
(B) 45 liters
(C) 34 liters
(D) 30 liters

11. The maximum characteristic strength of the stirrups reinforcement, is taken
(A) 350 N/mm2
(B) 375 N/mm2
(C) 395 N/mm2
(D) 415 N/mm2

12. For spans upto 10 m, the safe span to depth ratio for
(A) Cantilever is 7
(B) Simply supported beams is 20
(C) Continuous beams is 26
(D) All the above

13. In the formula a + bk for the calculation of the net effective section of single angles in tension connected by one leg only, the value of k, is
(A) 1/[1 + 0.25 (b/a)]
(B) 1/[1 + 0.35 (b/a)]
(C) 1/[1 + 0.20 (b/a)]
(D) 1/[1 + 0.5 (b/a)]

14. The side face reinforcement is provided if the depth of the web of a beam exceeds
(A) 600 mm
(B) 650 mm
(C) 700 mm
(D) 750 mm

15. The minimum compressive strength on 15 cm cubes of M 30 grade concrete at 7 days, should be a minimum of
(A) 7 N/mm2
(B) 10 N/mm2
(C) 20 N/mm2
(D) 30 N/mm2

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