MCQOPTIONS
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MCQOPTIONS
This section includes 263 Mcqs, each offering curated multiple-choice questions to sharpen your Concrete Technology knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
High percentage of tricalcium silicate and low percentage of dicalcium silicate in cement results in |
| A. | rapid hardening |
| B. | high erly strength |
| C. | high heat generation |
| D. | none of these |
| Answer» E. | |
| 252. |
The compaction factor is the ratio of weight of partially compacted concrete to the weight of fully compacted concrete. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 253. |
The sum of percentages of all deleterious materials in the aggregate shall not exceed |
| A. | 5% |
| B. | 10% |
| C. | 15% |
| D. | 20% |
| Answer» B. 10% | |
| 254. |
The maximum quantity of aggregate per 50 kg of cement should not exceed |
| A. | 100 kg |
| B. | 200 kg |
| C. | 350 kg |
| D. | 450 kg |
| Answer» E. | |
| 255. |
The diameter of the pipe line used for transportation of concrete by pumps should not exceed |
| A. | 10 cm |
| B. | 20 cm |
| C. | 30 cm |
| D. | 40 cm |
| Answer» D. 40 cm | |
| 256. |
In the slump test, the maximum size of the aggregate should not exceed 38 mm. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 257. |
The slump whould not exceed 50 mm when compacting concrete with vibrators. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 258. |
According to Indian standard specifications for the compressive strength test of cement, the cement and standard sand mortar in the ratio of |
| A. | 1 ; 1 |
| B. | 1 ; 2 |
| C. | 1 ; 3 |
| D. | 1 ; 4 |
| Answer» D. 1 ; 4 | |
| 259. |
The first compound which reacts with water when mixed with cement is tricalcium aluminate. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 260. |
The strength of cement concrete increases with the increase of water cement ratio. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 261. |
The development of first 28 days strength is on account of the hydration of |
| A. | dicalcium silicate |
| B. | tricalcium silicate |
| C. | tricalcium aluminate |
| D. | tetra calcium alumino ferrite |
| Answer» C. tricalcium aluminate | |
| 262. |
Which of the following cements is expected to have the highest compressive strength after 3 days. |
| A. | ordinary Portland cement |
| B. | rapid hardening cement |
| C. | high alumina cement |
| D. | sulphate resisting cement |
| Answer» D. sulphate resisting cement | |
| 263. |
The compressive strength of an ordinary Portland cement (1 : 3 cement mortar cube) after 7 days test should not be less than |
| A. | 11 N/mm2 |
| B. | 17.5 N/mm2 |
| C. | 22 N/mm2 |
| D. | 27.5 N/mm2 |
| Answer» C. 22 N/mm2 | |