Practice Test: Question Set - 18
1. In reinforced concrete footing on soil, the minimum thickness at edge should not be less than
- (A) 100 mm
- (B) 150 mm
- (C) 200 mm
- (D) 250 mm
2. For preparing a test-specimen, it is necessary
- (A) To
mix cement and fine aggregate by dry hand
- (B) To
mix coarse aggregates
- (C) To
mix water to the cement, fine aggregates and coarse aggregates
- (D) All the
above
3. For a good concrete
- (A) Aggregates
should be hard and durable
- (B) Water
should be free from organic materials
- (C) Cement
should be sufficient to produce the required strength
- (D) All the
above
4. The design yield stress of steel according to IS: 4561978 is:
(Where fy is the
characteristic yield strength of steel)
- (A) 0.37 fy
- (B) 0.57 fy
- (C) 0.67 fy
- (D) 0.87 fy
5. The process of hardening the concrete by keeping its surface moist is known
- (A) Placing
- (B) Wetting
- (C) Curing
- (D) Compacting
6. For the construction of the retaining structures, the type of concrete mix to be used, is
- (A) 1 : 3 : 6
- (B) 1 : 2 : 4
- (C) 1 : 1½
: 3
- (D) 1 : 4 : 8
7. The main reinforcement in the toe of a T-shaped R C. retaining wall is provided on
(i) Top face parallel to the wall
(ii) Top face perpendicular to the wall
(iii) Bottom face parallel to the wall
(iv) Bottom face perpendicular to the wall
The correct answer is
- (A) Only (ii) is correct
- (B) (i) and (ii) are correct
- (C) (iii) and (iv) are correct
- (D) Only (iv) is correct
8. The produce impermeable concrete
- (A) Thorough
mixing of concrete is required
- (B) Proper
compaction of concrete is required
- (C) Proper
curing of concrete is required
- (D) All the above
9. Pozzolanic properties exist in
- (A) Shales
- (B) Fly ash
- (C) Pumicite
- (D) All the
above
10. A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D) is less than
- (A) 1.5
- (B) 2.0
- (C) 2.5
- (D) 3.0
11. Pick up the correct statement from the following:
- (A) The
weight of ingredients of concrete mix, is taken in kilograms
- (B) Water
and aggregates are measured in liters
- (C) 20 bags
of cement make one tonne
- (D) All the
above
12. If fineness modulus of sand is 2.5, it is graded as
- (A) Very fine
sand
- (B) Fine sand
- (C) Medium sand
- (D) Coarse sand
13. Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is
- (A) 28 liters
- (B) 30 liters
- (C) 32 liters
- (D) 34 liters
14. The increased cohesiveness of concrete, makes it
- (A) Less
liable to segregation
- (B) More
liable to segregation
- (C) More liable
to bleeding
- (D) More
liable for surface scaling in frosty weather
15. Concrete is unsuitable for compaction by a vibrator if it is
- (A) Dry
- (B) Earth
moist
- (C) Semi-plastic
- (D) Plastic
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