rcc structures design MCQs – Page 7

Practise focused rcc structures design questions with marked answers for exam preparation and subject revision.

rcc structures design Mcqs

121. The maximum shear stress (qmax) in a rectangular beam is_______________?
0

A. 2.0 times the average

B. 1.75 times the average

C. 1.50 times the average

D. 1.25 times the average

122. For the design of a simply supported T-beam the ratio of the effective span to the overall depth of the beam is limited to______________?
0

A. 15

B. 10

C. 20

D. 25

123. In a singly reinforced beam____________?
0

A. Steel possesses initial stresses when embedded in concrete

B. Plane sections transverse to the centre line of the beam before bending remain plane after bending

C. Compression is borne entirely by concrete

D. Elastic moduli for concrete and steel have different values within the limits of deformation of the beam

124. In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength______________?
0

A. 200 kg/cm2

B. 300 kg/cm2

C. 100 kg/cm2

D. 400 kg/cm2

125. A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm2 steel. If the modular ratio (m) is 15, the depth of the neutral axis, is_________________?
0

A. 30 cm

B. 35 cm

C. 25 cm

D. 20 cm

126. Distribution reinforcement in a simply supported slab, is provided to distribute_______________?
0

A. Load

B. Temperature stress

C. All the above

D. Shrinkage stress

127. Though the effective depth of a T-beam is the distance between the top compression edge to the centre of the tensile reinforcement, for heavy loads, it is taken as__________________?
0

A. 1/16th of the span

B. 1/10th of the span

C. 1/8th of the span

D. 1/12th of the span

128. A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis______________?
0

A. Remains within the flange

B. None of these

C. Remains below the slab

D. Coincides the geometrical centre of the beam

129. For a number of columns constructed in a rcjw, the type of foundation provided, is_______________?
0

A. Strip

B. Raft

C. Footing

D. Strap

130. The length of the straight portion of a bar beyond the end of the hook, should be at least_______________?
0

A. Seven times the diameter

B. Twice the diameter

C. Thrice the diameter

D. Four times the diameter

131. If the depth of actual neutral axis of a doubly reinforced beam______________?
0

A. All the above

B. Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier

C. Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier

D. Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously

132. An under-reinforced section means_________________?
0

A. Steel provided is insufficient

B. Steel is provided at the underside only

C. Steel provided on one face only

D. Steel will yield first

133. The steel generally used in R.C.C. work, is_________________?
0

A. Stainless

B. High tension steel

C. High carbon steel

D. Mild steel

134. In a combined footing if shear stress does not exceed 5 kg/cm2, the nominal stirrups provided are________________?
0

A. 6 legged

B. 8 legged

C. 12 legged

D. 10 legged

135. The minimum number of main steel bars provided in R.C.C________________?
0

A. All the above

B. Circular columns is 6

C. Rectangular columns is 4

D. Octagonal columns is 8

136. A short column 20 cm 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm2 and 300 kg/cm2, the Safe load on the column, should not exceed_______________?
0

A. 4120 kg

B. 412,000 kg

C. None of these

D. 41,200 kg

137. According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is_____________?
0

A. 10 kg/cm 2

B. 20 kg/cm2

C. 5 kg/cm2

D. 15 kg/cm2

138. Pick up the assumption for the design of a pre-stressed concrete member from the following_______________?
0

A. All the above

B. Variation of stress in reinforcement due to changes in external loading is negligible

C. A transverse plane section remains a plane after bending

D. During deformation limits, Hooks law is equally applicable to concrete as well as to steel

139. Steel beam theory is used for_______________?
0

A. Beams if shear exceeds 4 times allowable shear stress

B. Design of simple steel beams

C. Doubly reinforced beams ignoring compressive stress in concrete

D. Steel beams encased in concrete

140. The angle of repose of a soil is the maximum angle which the outer face of the soil mass makes_______________?
0

A. With the vertical

B. With the horizontal

C. With the perpendicular to the inclined plane of the soil

D. None of these

Previous Next

Showing 121 to 140 of 227 mcqs