Concrete Technology Questions and Answers – Sampling

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

1. Loss on Ignition (L.O.I.) is the loss in weight of cement after being heated to ____________
a) 1000°C
b) 100°C
c) 500°C
d) 1500°C
View Answer

2. On cooling below 1250^oC, C₃S decomposes ____________
a) Fast
b) Slowly
c) Never
d) Depends on the conditions
View Answer

3. If the moisture content of 5 to 10% by weight, then the bulking of sand is increased by __________
a) 20
b) 30
c) 40
d) 50
View Answer

4. When sand is fully dry then it’s volume is _________
a) Equal
b) Less
c) More
d) Can’t say
View Answer

5. The mineral oil if present in mixing for concrete ______________
a) Improves strength
b) Reduces strength
c) Gives more slump
d) Gives a smooth surface
View Answer

6. To neutralize 200 ml of sample should not require more than 10 ml of __________ normal HCI using methyl orange.
a) 1
b) .1
c) 10
d) .01
View Answer

7. The loss in weight should not exceed ________ % when tested with Na₂SO₄ and ________ % with MgSO₄ solution.
a) 12, 18
b) 18, 12
c) 10, 15
d) 15, 10
View Answer

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.