Cement Types - Concrete Technology Questions and Answers

This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “Types of Cement”.

1. Which chemical compostion has highest content in OPC?
a) Alumina
b) Silica
c) Lime
d) Iron Oxide
View Answer

Answer: c
Explanation: Lime forms nearly two-third (2/3) of the cement. Therefore sufficient quantity of the lime must be in the raw materials for the manufacturing of cement.

2. Excess in lime causes _______
a) The cement to shrink and integrate
b) The cement to shrink and disintegrate
c) The cement to expand and integrate
d) The cement to expand and disintegrate
View Answer

Answer: d
Explanation: Sufficient quantity of lime forms di-calcium silicate (C2SiO2) and tri-calcium silicate in the manufacturing of cement.

3. Silica in excess causes ________
a) The cement to set slowly
b) The cement to set quickly
c) The cement to expand
d) The cement to disintegrate
View Answer

Answer: a
Explanation: Silica gives strength to the cement. Silica in excess causes the cement to set slowly.

4. Alumina in excess causes _________
a) Reduces the strength of the cement
b) Inceases the strength of the cement
c) No change
d) Sometimes increase or decrease the strength of the cement
View Answer

Answer: a
Explanation: Alumina supports to set quickly to the cement. It also lowers the clinkering temperature. Alumina in excess reduces the strength of the cement.

5. Which compound gives the colour to the cement?
a) Lime
b) Silica
c) Iron Oxide
d) Alumina
View Answer

Answer: c
Explanation: Iron oxide pigments are in the form of particles ranging approximately from 0.1 to 1.0 micron. The difference in color between one pigment and another is due to the shape and surface structure of the particle.

Sanfoundry Certification Contest of the Month is Live. 100+ Subjects. Participate Now!

6. Which cement contains high percentage of C₃S and less percentage of C₂S?
a) Rapid Hardening Cement
b) Ordinary Portland Cement
c) Quick Setting Cement
d) Low Heat Cement
View Answer

Answer: a
Explanation: This cement contains high percentage of C₃S and less percentage of C₃S. This is infact high early strength cement.

7. When concrete is to be laid under water ___________ is to used.
a) Rapid Hardening Cement
b) Ordinary Portland Cement
c) Quick Setting Cement
d) Low Heat Cement
View Answer

Answer: c
Explanation: When concrete is to be laid under water, quick setting cement is to used. This cement is manufactured by adding small percentage of aluminum sulphate (Al₂SO₄) which accelerates the setting action.

8. Which of the following is correct for Low Heat Cement?
a) Suitable for use in cold weather areas
b) Heat of hydration is reduced by tri calcium aluminate content
c) This cement requires longer period of curing
d) This cement contains high aluminate %age usually between 35-55%.
View Answer

Answer: b
Explanation: In this cement the heat of hydration is reduced by tri calcium aluminate content. It contains less percentage of lime than ordinary port land cement. It is used for mass concrete works such as dams etc.

Sanfoundry Global Education & Learning Series – Concrete Technology.

To practice all areas of Concrete Technology, 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]

« Prev - Concrete Technology Questions and Answers – Hydration of Cement

» Next - Concrete Technology Questions and Answers – Applications of Types of Cement

Related Posts:

Recommended Articles: