Concrete Technology Questions and Answers – Hot Weather Concreting, Prepacked and Vacuum Cement

This set of Concrete Technology Questions and Answers for Experienced people focuses on “Hot Weather Concreting, Prepacked and Vacuum Cement”.

1. Concrete is not recommended to be placed at a temperature above _________^oC.
a) 20
b) 30
c) 40
d) 50
View Answer

2. IS: 7861 part-1 deals with ___________
a) Hot weathering concrete
b) Cold weathering concrete
c) Air entertained concrete
d) OPC
View Answer

3. A higher temperature of fresh concrete results in a __________ hydration of cement.
a) More rapid
b) Rapid
c) Low
d) Very low
View Answer

4. Does this reduce handling time?
a) True
b) False
View Answer

5. Rapid evaporation may cause plastic shrinkage __________
a) Elastic shrinkage
b) Plastic shrinkage
c) High workability
d) Good strength
View Answer

6. It is difficult to retain moisture for hydration for RAPID EVAPORATION OF WATER DURING CURING PERIOD.
a) True
b) False
View Answer

7. Prepacked concrete _________ water proofing concrete.
a) Is
b) Is not
c) May be
d) Is but depends on temperature
View Answer

8. Cement has ________ % volumetric shrinkage after curing.
a) 5
b) 6
c) 7
d) 8
View Answer

9. After vacuum mixing, the volumetric shrinkage can be raised from 3–5% to __________ % in different cements.
a) 1-2
b) 3-5
c) 5-7
d) 6-8
View Answer

10. Vacuum mixing systems reduce the exposure by _________ %.
a) 20
b) 40
c) 50
d) 10
View Answer

11. The exposure of conventional mixing in open bowl is about ___________ ppm in the breathing zone.
a) 20
b) 40
c) 50
d) 10
View Answer

Sanfoundry Global Education & Learning Series – Concrete Technology.

To practice all areas of Concrete Technology for Experienced people, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]