R.C.C. Structure Design Objective Questions and Answers

155. If R and 7' are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width

156. For stairs spanning horizontally, the minimum waist provided is

A. 4 cm

157. The number of treads in a flight is equal to

A. risers in the flight

158. A pre-stressed concrete member

A. is made of concrete

B. is made of reinforced concrete

C. is stressed after casting

D. possesses internal stresses.

Discussion

159. In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength

160. A pre-stressed concrete member is preferred because

A. its dimensions are not decided from the diagonal tensile stress

B. large size of long beams carrying large shear force need not be adopted

C. removal of cracks in the members due to shrinkage

D. all the above.

Discussion

161. In a prestressed member it is advisable to use

A. low strength concrete only

B. high strength concrete only

C. low strength concrete but high tensile steel

D. high strength concrete and high tensile steel

Discussion

Civil Engineering Objective Questions { R.C.C. Structure Design }