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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