MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Concrete Technology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In order to prevent this rapid reaction _______ is added to the clinker. |
| A. | C4AF |
| B. | Gypsum |
| C. | Water |
| D. | Extra cement |
| Answer» C. Water | |
| 2. |
Which compound is liberates lower heat? |
| A. | C2S |
| B. | C3S |
| C. | C3A |
| D. | C4AF |
| Answer» B. C3S | |
| 3. |
The development of first 28 days strength is on account of the hydration of __________ |
| A. | C2S |
| B. | C3S |
| C. | C3A |
| D. | C4AF |
| Answer» C. C3A | |
| 4. |
As the hydration proceeds the deposits of hydrated products on the original cement grains makes the diffusion of water to unhydrated nucleus ________ |
| A. | Easy |
| B. | Very difficult |
| C. | Very easy |
| D. | Average |
| Answer» C. Very easy | |
| 5. |
APPROXIMATE_PERCENTAGE_RANGE_OF_A2O3_IN_OPC_IS____?$ |
| A. | 17-25 |
| B. | 3-8 |
| C. | 3- 10 |
| D. | 4-15 |
| Answer» D. 4-15 | |
| 6. |
THE_MINIMUM_WATER_TO_CEMENT_RATIO_FOR_CEMENT_CONCRETE_TO_HYDRATE_IS____?$ |
| A. | 0.65 |
| B. | 0.5 |
| C. | 0.38 |
| D. | 0.27 |
| Answer» D. 0.27 | |
| 7. |
For complete hydration of cement the w/c ratio needed is ___? |
| A. | More than 0.25 |
| B. | More than 0.25 but less than 0.35 |
| C. | More than 0.35 but less than 0.60 |
| D. | More than 0.60 |
| Answer» D. More than 0.60 | |
| 8. |
In order to prevent this rapid reaction ___ is added to the clinker. |
| A. | C<sub>4</sub>AF |
| B. | Gypsum |
| C. | Water |
| D. | Extra cement |
| Answer» C. Water | |
| 9. |
Which compound may lead to a rapid stiffening of the paste with a large amount of the heat generation? |
| A. | C<sub>2</sub>S |
| B. | C<sub>3</sub>S |
| C. | C<sub>3</sub>A |
| D. | C<sub>4</sub>AF |
| Answer» D. C<sub>4</sub>AF | |
| 10. |
Which compound is liberates higher heat? |
| A. | C<sub>2</sub>S |
| B. | C<sub>3</sub>S |
| C. | C<sub>3</sub>A |
| D. | C<sub>4</sub>AF |
| Answer» C. C<sub>3</sub>A | |
| 11. |
The development of first 28 days strength is on account of the hydration of __ |
| A. | C<sub>2</sub>S |
| B. | C<sub>3</sub>S |
| C. | C<sub>3</sub>A |
| D. | C<sub>4</sub>AF |
| Answer» C. C<sub>3</sub>A | |
| 12. |
As the hydration proceeds the deposits of hydrated products on the original cement grains makes the diffusion of water to unhydrated nucleus ____ |
| A. | Easy |
| B. | Very difficult |
| C. | Very easy |
| D. | Average |
| Answer» C. Very easy | |
| 13. |
What is hydration of cement? |
| A. | Chemical reaction of cement with acid |
| B. | Chemical reaction of cement with water |
| C. | Chemical reaction of cement with base |
| D. | Chemical reaction of cement with salt, and acid |
| Answer» C. Chemical reaction of cement with base | |