MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
Silica fume is usually added during ____________ |
| A. | Before concrete production at a concrete plant |
| B. | After concrete production at a concrete plant |
| C. | Concrete production at a concrete plant |
| D. | Curing |
| Answer» D. Curing | |
| 2. |
Spherical particles in silica fume has diameter of _______ |
| A. | <1 μm |
| B. | >1 μm |
| C. | 1 μm |
| D. | .1 μm |
| Answer» B. >1 μm | |
| 3. |
Bulk density of the silica fume varies from ____________ |
| A. | 130-600 kg/m3 |
| B. | 650 kg/mm3 |
| C. | 75-150 kg/mm3 |
| D. | 750 kg/mm3 |
| Answer» B. 650 kg/mm3 | |
| 4. |
The specific surface (m2/kg) of silica fume. |
| A. | 370 |
| B. | 15000-30000 |
| C. | 45000 |
| D. | 420 |
| Answer» C. 45000 | |
| 5. |
Content of SiO2 in silica fume is ___________ |
| A. | 52% |
| B. | 35% |
| C. | 21.9% |
| D. | 85-97% |
| Answer» E. | |
| 6. |
SPHERICAL_PARTICLES_IN_SILICA_FUME_HAS_DIAMETER_OF________?$ |
| A. | <1 μm |
| B. | >1 μm |
| C. | 1 μm |
| D. | .1 μm |
| Answer» B. >1 ‚âà√≠¬¨‚à´m | |
| 7. |
Silica_fume_is_usually_added_during_____________$ |
| A. | Before concrete production at a concrete plant |
| B. | After concrete production at a concrete plant |
| C. | Concrete production at a concrete plant |
| D. | Curing |
| Answer» D. Curing | |
| 8. |
Bulk density of the silica fume varies fro? |
| A. | 130-600 kg/m<sup>3</sup> |
| B. | 650 kg/mm<sup>3</sup> |
| C. | 75-150 kg/mm<sup>3</sup> |
| D. | 750 kg/mm<sup>3</sup> |
| Answer» B. 650 kg/mm<sup>3</sup> | |
| 9. |
Specific Gravity of silica fume. |
| A. | 2.38 |
| B. | 2.65 |
| C. | 2.94 |
| D. | 2.22 |
| Answer» E. | |
| 10. |
The specific surface (m2/kg) of silica fume. |
| A. | 370 |
| B. | 15000-30000 |
| C. | 45000 |
| D. | 420 |
| Answer» C. 45000 | |
| 11. |
Content of CaO in silica fume? |
| A. | 5 |
| B. | 21 |
| C. | 40 |
| D. | <1 |
| Answer» E. | |
| 12. |
Content of SiO2 in silica fume is ___________ |
| A. | 52% |
| B. | 35% |
| C. | 21.9% |
| D. | 85-97% |
| Answer» E. | |
| 13. |
Concrete containing silica fume can have very __________ strength and can be very __________ |
| A. | Low, Durable |
| B. | High, Durable |
| C. | Low, brittle |
| D. | High, brittle |
| Answer» C. Low, brittle | |
| 14. |
Silica fume is ______________ |
| A. | Less reactive |
| B. | Neutral |
| C. | More reactive |
| D. | Absent in concrete |
| Answer» D. Absent in concrete | |
| 15. |
What is Silica Fume? |
| A. | Silica fume is a byproduct of producing silicon metal or ferrosilicon alloys |
| B. | Silica fume is a mono product of producing silicon metal or ferrosilicon alloys |
| C. | Most commonly found in nature as quartz and in various living organisms |
| D. | Hydrocarbon combustion affords the two principal carbon oxides: carbon monoxide and carbon dioxide |
| Answer» B. Silica fume is a mono product of producing silicon metal or ferrosilicon alloys | |