Civil Engineering Objective Questions { Concrete Technology }

Home // Civil Engineering // Concrete Technology

190. The bulk density of aggregates, depends upon

D. all the above

191. The bulk density of aggregates, is generally expressed as

A. tonnes/cubic metre

B. kg/cubic metre

192. The risk of segregation is more for

B. larger proportion of maximum size aggregate

C. coarser grading

D. all the above

193. Pick up the correct statement from the following :

A. Continuous grading is not necessary for obtaining a minimum of air voids

B. The omission of a certain size of aggregate is shown by a straight horizontal line on the grading curve

C. The omission of a certain size of aggregate in concrete increases the workability but also increases the liability to segregation

D. All the above

194. The type of aggregates of same nominal size, which contain less voids when compacted, are

A. rounded spherical

D. none of these

195. The maximum amount of dust which may be permitted in aggregates is

A. 5% of the total aggregates for low Workability with a coarse grading

B. 10% of the total aggregates for low workability with a fine grading

C. 20% of the total aggregates for a mix having high workability with fine grading

D. all the above

196. Pick up the correct statement from the following :

A. The free water is the amount of water added while mixing and the amount of water held on the surface of the aggregates prior to mixing

B. The total water is the free water and the amount actually absorbed by the aggregates

C. Neither A nor B

D. Both A and B

Page 28 of 39

« 26 27 28 2930 »