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Plant Physiology - Section 3 Multiple Questions and Answers.
| 26. | The minimum lap for a flexible d.p.c. is: | ||
| A. | 50 mm | ||
| B. | 75 mm | ||
| C. | 100 mm | ||
| D. | 150 mm | ||
| 27. | The number of layers in which the slump cone is filled and the number of times each layer is rodded is: | ||
| A. | 2; 25 | ||
| B. | 3; 25 | ||
| C. | 3; 35 | ||
| D. | 4; 35 | ||
| 28. | A horizontal d.p.c. is placed to stop moisure: | ||
| A. | rising up from the ground | ||
| B. | running down into the foundations | ||
| C. | passing from the outer leaf to the inner leaf | ||
| D. | flooding the cavity | ||
| 29. | Coarse aggregate is mainly retained on a sieve of: | ||
| A. | 3 mm | ||
| B. | 4 mm | ||
| C. | 5 mm | ||
| D. | 6 mm | ||
| 30. | To keep the bed joints to the required thickness, it is advisable to: | ||
| A. | level the work frequently | ||
| B. | lay the bricks frog-uppermost | ||
| C. | use the gauge staff regularly | ||
| D. | take great care with bed joints | ||
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