Concrete Technology and Design

141. In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on

1. The front face in one direction
2. The front face in both directions
3. The inner face in one direction
4. The inner face in both directions

View answer

142. In working stress design, permissible bond stress in the case of deformed bars is more than that in plain bars by

1. 10 %
2. 20 %
3. 30 %
4. 40 %

View answer

143. Increase in the moisture content in concrete

1. Reduces the strength
2. Increases the strength
3. Does not change the strength
4. All of the above

View answer

144. Inert material of a cement concrete mix, is

1. Water
2. Cement
3. Aggregate
4. None of these

View answer

145. Internal friction between the ingredients of concrete, is decreased by using

1. Less water
2. Fine aggregates
3. Rich mix
4. More water and coarse aggregates

View answer

146. Joints in concrete structures, are provided

1. To reduce the tensile stresses likely to be developed due to evaporation of water
2. To minimise the change in the dimensions of the slab
3. To minimise the necessary cracking
4. All the above

View answer

147. Le-Chatelier's apparatus is used for testing

1. Soundness of cement
2. Hardness of cement
3. Strength of cement
4. Durability of cement

View answer

148. Log Angles machine is used to test the aggregate for

1. Crushing strength
2. Impact value
3. Abrasion resistance
4. Water absorption

View answer

149. M 150 grade of concrete approximates

1. 1 : 3 : 6 mix
2. 1 : 1 :2 mix
3. 1 : 2 : 4 mix
4. 1 : 1.5 : 3 mix

View answer

150. M10 grade of concrete approximates

1. 1 : 3 : 6 mix
2. 1 : 1 : 2 mix
3. 1 : 2 : 4 mix
4. 1 : 1.5 : 3 mix

View answer