Civil Engineering - RCC Structures Design

41. 

P is the prestressed force applied to tendon of a rectangular prestressed beam whose area of cross section is A and sectional modulus is Z. The minimum stress f on the beam subjected to a maximum bending moment M is

A.
B.
C.
D.
E.

Answer: Option C

Explanation:

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42. 

In a singly reinforced beam

A. compression is borne entirely by concrete
B. steel possesses initial stresses when em-beded in concrete
C. plane sections transverse to the centre line of the beam before bending remain plane after bending
D. elastic modulii for concrete and steel have different values within the limits of deformation of the beam
E. none of these.

Answer: Option C

Explanation:

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43. 

A pre-cast pile generally used, is

A. circular
B. square
C. octagonal
D. square with corners chamfered.

Answer: Option D

Explanation:

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44. 

On an absolutely rigid foundation base, the pressure will

A. be more at the edges of the foundation
B. be uniform
C. not be uniform
D. be zero at the centre of the foundation.

Answer: Option C

Explanation:

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45. 

As per IS : 456, the reinforcement in a column should not be less than

A. 0.5% and not more than 5% of cross-sec-tional area
B. 0.6% and not more than 6% of cross-see-tional area
C. 0.7% and not more than 7% of cross-sec-tional area
D. 0.8% and not more than 8% of cross-sectional area
E. none of these.

Answer: Option D

Explanation:

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