Concrete Technology Mock Test 5

10%

Question 1 of 10

1. What does 240 in power’s experiment stand for?

Intrinsic strength of gel

Gel space ratio

Water cement ratio

Extrinsic strength of gel

Question 1 of 10

Question 2 of 10

2. Ultra-High Performance Concrete (UHPC), also known as ______

Active powder concrete

Reactive powder concrete

NPC

High Strength concrete

Question 2 of 10

Question 3 of 10

3. Concrete placed in cold weather will take __________ time to gain strength.

Less

Equal to hot weather

Question 3 of 10

Question 4 of 10

4. What is the percentage of steel fibre by weight in UHPC?

28.5

6.2

4.4

1.2

Question 4 of 10

Question 5 of 10

5. ____________ mm nominal maximum size aggregates gives optimum strength.

9.5 and 10.5

10.5 and 12.5

9.5 and 12.5

11.5 and 12.5

Question 5 of 10

Question 6 of 10

6. Which type of aggregates are used to produce 70MPa compressive strength?

Flaky

All in one

Fine

Coarse

Question 6 of 10

Question 7 of 10

7. What is the percentage of the accelerator by weight in UHPC?

1.2

4.4

6.2

28.5

Question 7 of 10

Question 8 of 10

8. Gel/Space ratio = x = Volume of gel / Space available = 0.657 C / 0.319 C+ Wo. Here Wo stands for?

Volume of gel

Weight of cement in kg

Weight of cement in g

Volume of mixing water in ml

Question 8 of 10

Question 9 of 10

9. Range of modulus of elasticity for UHPC ___________

40-45 GPa

30-35 GPa

45-50 GPa

35-40 GPa

Question 9 of 10

Question 10 of 10

10. What is the gel/space ratio?

Volume of the hydrated cement paste to the sum of volumes of the hydrated cement and of the capillary pores

Volume of gel to the volume of space present in the concrete

Volume of water to the volume of cement

Volume of the hydrated cement paste to the sum of volumes of the hydrated cement

Question 10 of 10