250+ TOP MCQs on Mix Design and Answers

Concrete Technology Multiple Choice Questions on “Mix Design”.

1. The __________ compressive strength required from structural consideration.
a) Nominal
b) Minimum
c) Maximum
d) No
Answer: b
Clarification: Option d can be eliminated easily because we need atleast some compressive strength. The minimum compressive strength required from structural consideration.

2. The adequate workability necessary for ___________ compaction with the compacting equipment available.
a) Half
b) Quarter
c) Full
d) Double
Answer: c
Clarification: Option d can be eliminated easily because double compaction is not possible. The adequate workability necessary for full compaction with the compacting equipment available.

3. ___________ water-cement ratio content to give adequate durability for the particular site conditions.
a) Minimum
b) Nominal
c) .5
d) Maximum
Answer: d
Clarification: Maximum water-cement ratio and/or maximum cement content to give adequate durability for the particular site conditions. It helps to avoid shrinkage cracking due to the temp cycle in mass concrete.

4. _______ cement content to avoid shrinkage cracking due to temperature cycle in mass concrete.
a) Minimum
b) Nominal
c) .5
d) Maximum
Answer: d
Clarification: Maximum cement content to avoid shrinkage cracking due to temperature cycle in mass concrete. It gives adequate durability for the particular site condition.

5. ________ has designated the concrete mixes into a number of grades as M10, M15.
a) IS 456-2000
b) IS 456-2010
c) IS 513-1999
d) IS 465-2000
Answer: a
Clarification: IS 456-2000 has designated the concrete mixes into a number of grades as M10, M15, M20, M25, M30, M35 and M40.

6. Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by _______
a) IS 456-2000
b) IS 456-2010
c) IS 513-1999
d) IS 465-2000
Answer: a
Clarification: Option can be eliminated because there is no such code. Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by IS 456:2000.

Leave a Reply

Your email address will not be published. Required fields are marked *