Civil Engineering RCC Structure Design MCQ Test - Set 09 - ObjectiveBooks

# Practice Test: Question Set - 09

1. The breadth of a ribbed slab containing two bars must be between
(A) 6 cm to 7.5 cm
(B) 8 cm to 10 cm
(C) 10 cm to 12 cm
(D) 12 cm to 15 cm

2. The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, is
(A) 51.5
(B) 52.5
(C) 53.5
(D) 54.5

3. If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is
(A) 10 mm
(B) 12 mm
(C) 14 mm
(D) 16 mm

4. Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than
(A) One diameter of thinner bar
(B) One diameter of thicker bar
(C) Twice the diameter of thinner bar
(D) None of these

5. For a number of columns constructed in a rcjw, the type of foundation provided, is
(A) Footing
(B) Raft
(C) Strap
(D) Strip

6. A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm2 steel. If the modular ratio (m) is 15, the depth of the neutral axis, is
(A) 20 cm
(B) 25 cm
(C) 30 cm
(D) 35 cm

7. In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed
(A) 10 mm
(B) 15 mm
(C) 20 mm
(D) 25 mm

8. The diameter of main bars in R.C.C. columns, shall not be less than
(A) 6 mm
(B) 8 mm
(C) 10 mm
(D) 12 mm

9. If d is the diameter of a bar, ft is allowable tensile stress and fb, is allowable bond stress, the bond length is given by
(A) ft .d/4fb
(B) (Ï€/4). (ft .d/fb)
(C) Ï€ ft ./fb
(D) (Ï€/4). (ft .d3/fb)

10. An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encased with the floor of a hall 12 meters by 7 meters, is spaced at 3 meters from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is
(A) 300 cm
(B) 233 cm
(C) 176 cm
(D) 236 cm

11. The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than
(A) 18 bar diameters
(B) 24 bar diameters
(C) 30 bar diameters
(D) 36 bar diameters

12. As the percentage of steel increases
(A) Depth of neutral axis decreases
(B) Depth of neutral axis increases
(C) Lever arm increases
(D) Lever arm decreases

13. The effective width of a column strip of a flat slab, is
(A) One-fourth the width of the panel
(B) Half the width of the panel
(D) Diameter of the column

14. As per IS : 1343, total shrinkage for a pre-tensioned beam, is
(A) 3.0 × 10-2
(B) 3.0 × 10-3
(C) 3.0 × 10-5
(D) 3.5 × 10-5

15. Dimensions of a beam need be changed if the shear stress is more than
(A) 10 kg/cm2
(B) 15 kg/cm2
(C) 20 kg/cm2
(D) 25 kg/cm2

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