Concrete Technology and RCC Design MCQ - Set 15 - ObjectiveBooks

# Practice Test: Question Set - 15

1. For a cantilever of effective depth of 0.5 m, the maximum span to satisfy vertical deflection limit is
(A) 3.5 m
(B) 4 m
(C) 4.5 m
(D) 5 m

2. The bulk density of aggregates does not depend upon:
(A) Size and shape of aggregates
(B) Specific gravity of aggregates
(D) Size and shape of the container

3. How long will it take for the concrete to achieve 100% of its strength?
(A) 7 days
(B) 14 days
(C) 21 days
(D) 28 days

4. A higher modular ratio shows
(A) Higher compressive strength of concrete
(B) Lower compressive strength of concrete
(C) Higher tensile strength of steel
(D) Lower tensile strength of steel

5. For the construction of cement concrete floor, the maximum permissible size of aggregate, is
(A) 4 mm
(B) 6 mm
(C) 8 mm
(D) 10 mm

6. The specifications of a cement bag for storage, are
(A) Weight 50 kg
(B) Height 18 cm
(C) Plan area 3000 sq. cm
(D) All the above

7. The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on
(A) Top face perpendicular to wall
(B) Bottom face perpendicular to wall
(C) Both top and bottom faces perpendicular to wall
(D) None of the above

8. Separation of coarse aggregates from mortar during transportation, is known
(A) Bleeding
(B) Creeping
(C) Segregation
(D) Shrinkage

9. A flaky aggregate is said to be elongated if its length is
(A) Equal to the mean size
(B) Twice the mean size
(C) Thrice the mean size
(D) Four times the mean size

(A) Both A and R is true and R is the correct explanation of A
(B) Both A and R is true but R is not the correct explanation of A
(C) A is true but R is false
(D) A is false but R is true

11. You are asked to construct a massive dam, the type of cement you will use, is
(A) Ordinary Portland cement
(B) Rapid hardening cement
(C) Low heat cement
(D) Blast furnace slag cement

12. An ideal ware house, is provided
(A) Water proof masonry walls
(B) Water proof roof
(C) Few windows which remain generally closed
(D) All the above

13. Normally pre-stressing wires are arranged in the
(A) Upper part of the beam
(B) Lower part of the beam
(C) Center
(D) Anywhere

14. Pick up the correct statement from the following:
(A) Bulking of sand is caused due to formation of a thin film of surface moisture
(B) Fine sand bulks more than coarse sand
(C) The volume of fully saturated sand, is equal to the volume of dry and loose sand
(D) All the above

15. The minimum percentage of chemical ingredient of cement is that of
(A) Magnesium oxide
(B) Iron oxide
(C) Alumina
(D) Lime

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