McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 301. |
Grading of sand causes great variation in |
| A. | workability of concrete |
| B. | strength of concrete |
| C. | durability of concrete |
| D. | all the above |
| Answer» D. all the above | |
| 302. |
The percentage of the aggregate of F.M. 2.6 to be combined with coarse aggregate of F.M. 6.8 for obtaining the aggregates of F.M. 5.4, is |
| A. | 30 % |
| B. | 40 % |
| C. | 50 % |
| D. | 60 % |
| Answer» C. 50 % | |
| 303. |
The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is |
| A. | 1 : 2 : 4 |
| B. | 1 : 3 : 6 |
| C. | 1 : 1½ : 3 |
| D. | 1 : 1 : 2 |
| Answer» C. 1 : 1½ : 3 | |
| 304. |
Joints in concrete structures, are provided |
| A. | to reduce the tensile stresses likely to be developed due to evaporation of water |
| B. | to minimise the change in the dimensions of the slab |
| C. | to minimise the necessary cracking |
| D. | all the above |
| Answer» D. all the above | |
| 305. |
For the construction of R.C.C. slabs, columns, beams, walls, etc. the grade of concrete mix used, is |
| A. | 1 : 3 : 6 |
| B. | 1 : 1½ : 3 |
| C. | 1 : 2 : 4 |
| D. | 1 : 1 : 2 |
| Answer» C. 1 : 2 : 4 | |
| 306. |
Pick up the correct statement from the following: |
| A. | water enables chemical reaction to take place with cement |
| B. | water lubricates the mixture of gravel, sand and cement |
| C. | strength of concrete structure largely depends upon its workability |
| D. | all the above |
| Answer» D. all the above | |
| 307. |
The final operation of finishing floors, is known as |
| A. | screeding |
| B. | floating |
| C. | trowelling |
| D. | finishing |
| Answer» C. trowelling | |
| 308. |
Transport of concrete by pumps, is done for a distance of |
| A. | 100 m |
| B. | 200 m |
| C. | 300 m |
| D. | 400 m |
| Answer» D. 400 m | |
| 309. |
Curing |
| A. | reduces the shrinkage of concrete |
| B. | preserves the properties of concrete |
| C. | prevents the loss of water by evaporation |
| D. | all of the above |
| Answer» D. all of the above | |
| 310. |
The datum temperature for maturity by Plowman, is |
| A. | 23°c |
| B. | 0° |
| C. | - 5.6°c |
| D. | - 11.7°c |
| Answer» D. - 11.7°c | |
| 311. |
The bulk density of aggregates, is generally expressed as |
| A. | tonnes/cubic metre |
| B. | kg/cubic metre |
| C. | kg/litre |
| D. | g/cm3 |
| Answer» C. kg/litre | |
| 312. |
For concreting tunnel linings, transportation of concrete is done by |
| A. | pans |
| B. | wheel borrows |
| C. | containers |
| D. | pumps |
| Answer» D. pumps | |
| 313. |
The factor which affects workability, is |
| A. | water content and its temperature |
| B. | shape and size of the aggregates |
| C. | air entraining agents |
| D. | all the above |
| Answer» D. all the above | |
| 314. |
Proper batching ensures |
| A. | economy |
| B. | durability |
| C. | workability |
| D. | all the above |
| Answer» D. all the above | |
| 315. |
The ratio of the length to breadth of a wooden float, is |
| A. | 4.5 |
| B. | 5.5 |
| C. | 6.5 |
| D. | 7.5 |
| Answer» D. 7.5 | |
| 316. |
Vicat's apparatus is used for |
| A. | fineness test |
| B. | consistency test |
| C. | setting time test |
| D. | soundness test |
| Answer» B. consistency test | |
| 317. |
Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is |
| A. | 30 % |
| B. | 40 % |
| C. | 50 % |
| D. | 60 % |
| Answer» A. 30 % | |
| 318. |
The grade of concrete not recommended by I.S. : 456, is |
| A. | m 100 |
| B. | m 200 |
| C. | m 300 |
| D. | m 500 |
| Answer» D. m 500 | |
| 319. |
The compaction of concrete, improves |
| A. | density |
| B. | strength |
| C. | durability |
| D. | all the above |
| Answer» D. all the above | |
| 320. |
Segregation is responsible for |
| A. | honey-combed concrete |
| B. | porous layers in concrete |
| C. | surface scaling in concrete |
| D. | all the above |
| Answer» D. all the above | |
| 321. |
Slump test of concrete is a measure of its |
| A. | consistency |
| B. | compressive strength |
| C. | tensile strength |
| D. | impact value |
| Answer» A. consistency | |
| 322. |
If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is |
| A. | 15,900 litres |
| B. | 16,900 litres |
| C. | 17,900 litres |
| D. | 18,900 litres |
| Answer» D. 18,900 litres | |
| 323. |
An ordinary Portland cement when tested for its fineness, should not leave any residue on I.S. sieve No. 9, more than |
| A. | 5 % |
| B. | 10 % |
| C. | 15 % |
| D. | 20 % |
| Answer» B. 10 % | |
| 324. |
The top diameter, bottom diameter and the height of a slump mould are: |
| A. | 10 cm, 20 cm, 30 cm |
| B. | 10 cm, 30 cm, 20 cm |
| C. | 20 cm, 10 cm, 30 cm |
| D. | 20 cm, 30 cm, 10 cm |
| Answer» A. 10 cm, 20 cm, 30 cm | |
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