Civil Engineering - Structural Design Specifications

Exercise :: Structural Design Specifications - Section 1

31. 

Pick up the correct precaution while spilicing the reinforcing bars

A. These are provided away from the sections of maximum stress
B. These are staggered
C. These are provided if the B.M. is more than 50% of M.R.
D. Not more than half the bars are spliced at a section
E. All the above.

Answer: Option E

Explanation:

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32. 

If Δ is the deviation of the individual test strength from the average of n samples, the standard deviation of concrete of the given grade is

A.
B.
C.
D.

Answer: Option A

Explanation:

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33. 

The over all depth of a solid slab is 20 cm and effective depth is 15 cm. The horizontal distance between parallel main reinforcement should not be more than

A. 30 cm
B. 40 cm
C. 45 cm
D. 60 cm

Answer: Option C

Explanation:

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34. 

The ratio of minimum compressive strength on 15 cm cubes prepared with the concrete of M 20 grade and M 40 grade, at 7 days should be at least

A. 1/3
B. 1/2
C. 3/2
D. 2.0

Answer: Option B

Explanation:

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35. 

The minimum compressive strength on 15 cm cubes of M 30 grade concrete at 7 days, should be a minimum of

A. 7 N/mm2
B. 10 N/mm2
C. 20 N/mm2
D. 30 N/mm2

Answer: Option C

Explanation:

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