Practice Test: Question Set - 09
1. For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than
- (A) 15 mm
- (B) 25 mm
- (C) 30 mm
- (D) 40 mm
2. Workability of concrete is measured by
- (A) Vicat
apparatus test
- (B) Slump test
- (C) Minimum void
method
- (D) Talbot
Richard test
3. The size of fine aggregates does not exceed
- (A) 2.75 mm
- (B) 3.00 mm
- (C) 3.75 mm
- (D) 4.75 mm
4. The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone
- (A) Compressive stress
- (B) Shear stress
- (C) Bond stress
- (D) Tensile stress
5. Hardening of cement occurs at
- (A) Rapid
rate during the first few days and afterwards it continues to increase at a
decreased rate
- (B) Slow
rate during the first few days and afterwards it continues to increase at a
rapid rate
- (C) Uniform rate
throughout its age
- (D) None of
these
6. The entrained air in concrete
- (A) Increases
workability
- (B) Decreases
workability
- (C) Decreases
resistance to weathering
- (D) Increases
strength
7. According to IS: 4561978, the flexural strength of concrete is
- (A) Directly proportional to compressive strength
- (B) Inversely proportional to compressive strength
- (C) Directly proportional to square root of compressive
strength
- (D) Inversely proportional to square root of
compressive strength
8. Slump test is done for
- (A) Clay
- (B) Sand
- (C) Lime
- (D) Concrete
9. Di-calcium silicate (C2S)
- (A) Hydrates
rapidly
- (B) Generates
less heat of hydration
- (C) Hardens
rapidly
- (D) Provides
less ultimate strength to cement
10. The limits of percentage p of the longitudinal reinforcement in a column is given by
- (A) 0.15% to 2%
- (B) 0.8% to 4%
- (C) 0.8% to 6%
- (D) 0.8% to 8%
11. The risk of segregation is more for
- (A) Wetter mix
- (B) Larger
proportion of maximum size aggregate
- (C) Coarser
grading
- (D) All the
above
12. Le-Chatelier's apparatus is used for testing
- (A) Soundness
of cement
- (B) Hardness
of cement
- (C) Strength
of cement
- (D) Durability
of cement
13. According to Whitney's theory, depth of stress block for a balanced section of a concrete beam is limited to (Where d is effective depth of beam).
- (A) 0.43 d
- (B) 0.537 d
- (C) 0.68 d
- (D) 0.85 d
14. Construction joints are generally provided in concrete
- (A) Roads
- (B) Retaining
walls
- (C) Lining of
canals
- (D) All the
above
15. If a grading curve is horizontal between the portions of 20 mm I.S. Sieve and 4.75 mm I.S. Sieve, the graded aggregates do not contain
- (A) 20 mm
particles
- (B) 10 mm
particles
- (C) 4.75 mm
particles
- (D) All the
above
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