Concrete Technology Mock Test 2

10%

Question 1 of 10

1. The unit weight of heavy weight concrete varies from __________ kg/m³.

1400

1000

2000

2400

Question 1 of 10

Question 2 of 10

2. What is the maximum size of split?

1mm

.5mm

2mm

10mm

Question 2 of 10

Question 3 of 10

3. An aggregate is said to be flaky if its least dimension is less than ___________

2/5th of mean dimension

1/5th of mean dimension

4/5th of mean dimension

3/5th of mean dimension

Question 3 of 10

Question 4 of 10

4. Loss on Ignition (L.O.I.) is the loss in weight of cement after being heated to _____________

1500°C

100°C

1000°C

500°C

Question 4 of 10

Question 5 of 10

5. If t1=Time at which water is first added to cement, t2=Time when needle fails to penetrate 5 mm to 7 mm from bottom of the mould, t3=Time when the needle makes an impression but the attachment fails to do so, then what is final setting time?

t3-t1

t2+t1

t2-t1

2*t1

Question 5 of 10

Question 6 of 10

6. Why do we need to find soundness?

To detect the combined lime in cement

To detect the combined alumina in cement

To detect the uncombined alumina in cement

To detect the uncombined lime in cement

Question 6 of 10

Question 7 of 10

7. What is the initial setting time?

The time at which cement paste gains its elasticity

The time at which cement paste gains its plasticity

The time at which cement paste loses its plasticity

The time at which cement paste loses its elasticity

Question 7 of 10

Question 8 of 10

8. How many principal thermal properties are there for aggregates?

Question 8 of 10

Question 9 of 10

9. Generally angular aggregates are the example of natural aggregates.

False

True

Question 9 of 10

Question 10 of 10

10. Pick up the most appropriate statement from the following.

Sp. Gr. = c/a-b

Sp. Gr. = c/(a-b)

Sp. Gr. = a-b/c

Sp. Gr. = (a-b)/c

Question 10 of 10