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Plant Physiology - Section 3 Multiple Questions and Answers.
| 16. | . Backfilling and compaction of trenches should be carried out in layers of: | ||
| A. | 150 mm | ||
| B. | 200 mm | ||
| C. | 300 mm | ||
| D. | 450 mm | ||
| 17. | The first reading taken from an instrument position is termed the: | ||
| A. | foresight | ||
| B. | datum sight | ||
| C. | intermediate sight | ||
| D. | backsight | ||
| 18. | A d.p.c. placed under a stone sill should extend on each side of the sill at least: | ||
| A. | 75 mm | ||
| B. | 100 mm | ||
| C. | 150 mm | ||
| D. | 200 mm | ||
| 19. | Sand-lime bricks are hardened by: | ||
| A. | steaming in an autoclave | ||
| B. | firing in a continuous kiln | ||
| C. | the addition of Portland cement | ||
| D. | continuous spraying with water | ||
| 20. | Before a foundation may be concreted, the natural foundation must be inspected by the: | ||
| A. | clerk of works | ||
| B. | factory inspector | ||
| C. | safety officer | ||
| D. | building control officer | ||
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