Concrete Technology and Design Exam Questions - Set 21 - ObjectiveBooks

Concrete Technology and Design Exam Questions - Set 21

Practice Test: Question Set - 21

1. For ensuring quality of concrete, use
    (A) Single sized aggregates
    (B) Two sized aggregate
    (C) Graded aggregates
    (D) Coarse aggregates

2. In working stress design, permissible bond stress in the case of deformed bars is more than that in plain bars by
    (A) 10 %
    (B) 20 %
    (C) 30 %
    (D) 40 %

3. Workability improved by adding
    (A) Air-entraining agent
    (B) Foaming agent
    (C) Oily-agent
    (D) All the above

4. The maximum value of hoop compression in a dome is given by
(Where, w = load per unit area of surface of dome R = radius of curvature d = thickness of dome)
    (A) wR/4d
    (B) wR/2d
    (C) wR/d
    (D) 2wR/d

5. The rock which is not calcareous, is:
    (A) Lime stone
    (B) Chalk
    (C) Laterite
    (D) None of these

6. A T-shaped retaining wall mainly consists of
    (A) One cantilever
    (B) Two cantilevers
    (C) Three cantilevers
    (D) Four cantilevers

7. Pick up the correct statement from the following:
    (A) Insufficient quantity of water makes the concrete mix harsh
    (B) Insufficient quantity of water makes the concrete unworkable
    (C) Excess quantity of water makes the concrete segregated
    (D) All the above

8. The fineness modulus of fine aggregate is in the range of
    (A) 2.0 to 3.5
    (B) 3.5 to 5.0
    (C) 5.0 to 7.0
    (D) 6.0 to 8.5

9. After casting, an ordinary cement concrete on drying
    (A) Expands
    (B) Mix
    (C) Shrinks
    (D) None of these

10. The most commonly used admixture which prolongs the setting and hardening time is
    (A) Gypsum
    (B) Calcium chloride
    (C) Sodium silicate
    (D) All of the above

11. For given water content, workability decreases if the concrete aggregates contain an excess of
    (A) Thin particles
    (B) Flat particles
    (C) Elongated particles
    (D) All the above

12. During erection, the pile of length ‘l’ is supported by a crane at a distance of
    (A) 0.207 l
    (B) 0.293 l
    (C) 0.707 l
    (D) 0.793 l
From the driving end of pile which rests on the ground

13. The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known
    (A) Grading
    (B) Curing
    (C) Mixing
    (D) Batching

14. The load factors for live load and dead load are taken respectively as
    (A) 1.5 and 2.2
    (B) 2.2 and 1.5
    (C) 1.5 and 1.5
    (D) 2.2 and 2.2

15. The mixture of different ingredients of cement, is burnt at
    (A) 1000°C
    (B) 1200°C
    (C) 1400°C
    (D) 1600°C

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