Concrete Technology Questions and Answers – Damp Proofing Admixtures

This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “Damp Proofing Admixtures”.

1. Damp proofing is done with a __________ based mixture.
a) Sand
b) Tar
c) Rubber
d) Lead
View Answer

Answer: b
Explanation: Damp proofing is done with a tar based mixture, designed to help discourage water from adhering to, or penetrating, the material’s surface.

2. Damp proofing __________ the process of water absorption.
a) Increase
b) Slows
c) Doesn’t effect
d) Depends on the mixture
View Answer

Answer: b
Explanation: Damp proofing is good for slowing down the rate at which moisture is absorbed.

3. Damp proofing is cheaper in the beginning, but leads to more expensive problems later on.
a) True
b) False
View Answer

Answer: a
Explanation: Damp proofing is cheaper in the beginning, but leads to more expensive problems later on as compared to water proofing.
advertisement

4. Damp proofing cracks along with the foundation.
a) True
b) False
View Answer

Answer: a
Explanation: If the surface has only been damp proofed, the cracks and crevices are also present in the coating of the damp proofing material.

5. Damp proofing __________ resist water well enough.
a) Does
b) Does not
c) Doesn’t effect
d) Depends on the temperature
View Answer

Answer: b
Explanation: Damp proofing does not resist water well enough to prevent oversaturation from ground water, or excessive and constant humidity.
Free 30-Day Java Certification Bootcamp is Live. Join Now!

6. DPC _________ effective used in concretes that are in contact with water under pressure.
a) Does
b) Doesn’t
c) Doesn’t effect
d) Depends on the temperature
View Answer

Answer: b
Explanation: Many so-called damp proofers are not effective, especially when used in concretes that are in contact with water under pressure.

7. Nomenclature of water proofing agent.
a) PC
b) KIM
c) PCKIM
d) WP
View Answer

Answer: b
Explanation: Nomenclature of water proofing agent is KIM and PC is the nomenclature of Portland cement.

8. The addition of the admixture to the mix __________ the surface tension.
a) Lowers
b) Higher
c) Don’t affect
d) No change
View Answer

Answer: a
Explanation: The addition of the admixture to the mix lowers the surface tension of the water thereby assisting in the formation of bubbles.

9. Entrapped air normally exists in the form of relatively _________ air voids.
a) Small
b) Absent
c) Large
d) Medium
View Answer

Answer: c
Explanation: Entrapped air normally exists in the form of relatively large air voids, which are not dispersed uniformly throughout the mix, entrained air exists in the form of minute disconnected bubbles well distributed throughout the mix.
advertisement

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.

advertisement
advertisement
Subscribe to our Newsletters (Subject-wise). Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Join our social networks below and stay updated with latest contests, videos, internships and jobs!

Youtube | Telegram | LinkedIn | Instagram | Facebook | Twitter | Pinterest
Manish Bhojasia - Founder & CTO at Sanfoundry
I’m Manish - Founder and CTO at Sanfoundry. I’ve been working in tech for over 25 years, with deep focus on Linux kernel, SAN technologies, Advanced C, Full Stack and Scalable website designs.

You can connect with me on LinkedIn, watch my Youtube Masterclasses, or join my Telegram tech discussions.

If you’re in your 40s–60s and exploring new directions in your career, I also offer mentoring. Learn more here.