Concrete Technology Set 2

grading ✘ curing ✘ mixing ✘ batching ✔ none of these ✔

Insufficient quantity of water makes the concrete mix harsh ✘ Insufficient quantity of water makes the concrete unworkable ✘ Excess quantity of water makes the concrete segregated ✘ Excess quantity of water causes bleeding in concrete ✔ All the above ✔

5 kg/cm2

✘

8 kg/cm2

✘

10 kg/cm2

✘

12 kg/cm2

✔

15 kg/cm2

✔

Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3

✘

Silica : Lime : Alumina : Iron oxide : 63 : 22 : 6 : 3

✘

Alumina : Silica : Lime : Iron oxide : 63 : 22 : 6 : 3

✘

Iron oxide : Alumina : Silica : Lime : 63 : 22 : 6 : 3

✔

100 m ✘ 200 m ✘ 300 m ✘ 400 m ✔ none of these ✔

clay ✘ sand ✘ lime ✘ concrete ✔

finer grinding ✘ burning at high temperature ✘ increased lime cement ✘ higher content of tricalcium ✔

The weight of ingredients of concrete mix, is taken in kilograms ✘ Water and aggregates are measured in litres ✘ The finished concrete is measured in cubic metres ✘ 20 bags of cement make one tonne ✔ All the above ✔

cement ✘ aggregates ✘ admixture ✘ water ✔ all the above ✔

fineness test ✘ consistency test ✘ setting time test ✘ soundness test ✔ compressive strength test ✔