Concrete Technology Questions and Answers – Factors Causing Variation in the Quality of Concrete

This set of Concrete Technology MCQs focuses on “Factors Causing Variation in the Quality of Concrete”.

1. Generally what is the w/c ratio?
a) .25
b) .5
c) .75
d) 1
View Answer

Answer: b
Explanation: Generally the water cement ratio is .42-.5 and if it exceeds it will create pores in concrete.

2. Silica fume is _________
a) Less reactive
b) Neutral
c) More reactive
d) Absent in concrete
View Answer

Answer: c
Explanation: One of the most beneficial uses for silica fume is in concrete, because of its both properties, it is a very reactive pozzolana.

3. Content of SiO2 in silica fume?
a) 52%
b) 35%
c) 21.9%
d) 85-97%
View Answer

Answer: d
Explanation: The content of SiO2 in silica fume is 85-97%. 35% is the content of SiO2 in Calcareous (ASTM C618 Class C) Fly Ash.
advertisement
advertisement

4. What is the content of Al2O3 in fly ash?
a) 30-60%
b) 15-30%
c) Up to 30%
d) 1-7%
View Answer

Answer: b
Explanation: The content of Al2O3 in fly ash has been tested according to procedures specified in IS: 1727-1967.

5. The property of a material that resists penetration or indentation by means of abrasion or scratching is known as ____________
a) Strength
b) Hardness
c) Stiffness
d) Toughness
View Answer

Answer: b
Explanation: The property of a material that resists penetration or indentation by means of abrasion or scratching is known as hardness.
Note: Join free Sanfoundry classes at Telegram or Youtube

6. During compression test of cast iron, the failure occurs i.e. the crack appears along the __________
a) Diagonal
b) Surface parallel to load applied
c) Surface perpendicular to load applied
d) Lateral
View Answer

Answer: a
Explanation: The failure occurs i.e. the crack appears along the diagonal during the compression test of cast iron.

7. It opens the area of improvement for quality construction rationally based on the documents from ___________ projects.
a) Previous
b) Next
c) Later
d) Future
View Answer

Answer: a
Explanation: It opens the area of improvement for quality construction rationally based on the documents from previous projects.
advertisement

Sanfoundry Global Education & Learning Series – Concrete Technology.

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

advertisement

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

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
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

Subscribe to his free Masterclasses at Youtube & discussions at Telegram SanfoundryClasses.