Practice Test: Question Set - 04
1. For the construction of cement concrete dams, the maximum permissible size of the aggregates, is
- (A) 40 mm
- (B) 50 mm
- (C) 60 mm
- (D) 70 mm
2. Pick up the incorrect statement from the following:
- (A) With passage
of time, the strength of cement increases
- (B) With passage
of time, the strength of cement decreases
- (C) After a
period of 24 months, the strength of cement reduces to 50%
- (D) The concrete
made with storage deteriorated cement, gains strength with time
3. The load carrying capacity of a helically reinforced column as compared to that of a tied column is about
- (A) 5 % less
- (B) 10 % less
- (C) 5 % more
- (D) 10 % more
4. To hydrate 500 kg of cement full water needed, is
- (A) 100 kg
- (B) 110 kg
- (C) 120 kg
- (D) 130 kg
5. Pick up the correct statement from the following:
- (A) A highly
absorptive aggregate reduces the workability of concrete considerably
- (B) The
specific gravity of aggregate is important for the determination of the
moisture content
- (C) The
absorption and porosity of an aggregate influence the property of the concrete
- (D) All the
above
6. In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on
- (A) Front face only
- (B) Inner face only
- (C) Both front face and inner face
- (D) None of the above
7. Under normal conditions using an ordinary cement, the period of removal of the form work, is:
- (A) 7 days for
beam soffits
- (B) 14
days for bottom slabs of spans 4.6 m and more
- (C) 21 days for
bottom beams over 6 m spans
- (D) All
the above
8. Water cement ratio is generally expressed in volume of water required per
- (A) 10 kg
- (B) 20 kg
- (C) 30 kg
- (D) 50 kg
9. The minimum cover in a slab should neither be less than the diameter of bar nor less than
- (A) 10 mm
- (B) 15 mm
- (C) 25 mm
- (D) 13 mm
10. To ensure constant moisture content in aggregates
- (A) Area of each
aggregate pile should be large
- (B) Height
of each aggregate pile should not exceed 1.50 m
- (C) Aggregate
pile should be left for 24 hours before aggregates are used
- (D) All
the above
11. Pick up the correct statement from the following:
- (A) Cement
should be mixed for at least one minute
- (B) 10%
of water is placed in the rotating drum before adding dry material
- (C) 10%
of water is added after placing the other ingredients in the drum
- (D) All the
above
12. The average permissible stress in bond for plain bars in tension is
- (A) Increased by 10% for bars in compression
- (B) Increased by 25% for bars in compression
- (C) Decreased by 10% for bars in compression
- (D) Decreased by 25% for bars in compression
13. Concrete mainly consists of
- (A) Cement
- (B) Aggregates
- (C) Water
- (D) All the
above
14. For the construction of thin R.C.C. structures, the type of cement to be avoided, is
- (A) Ordinary
Portland cement
- (B) Rapid
hardening cement
- (C) Low
heat cement
- (D) Blast
furnace slag cement
15. Which of the following R.C. retaining walls is suitable for heights beyond 6 m?
- (A) L-shaped wall
- (B) T-shaped wall
- (C) Counterfort type
- (D) All of the above
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