Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp…
Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following:
| A. | Alumina | B. | Lime |
| C. | Ironoxide | D. | Magnesia. |
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35.
Cast iron is used for
| A. | structural works in beams |
| B. | small sized water pipes |
| C. | columns and struts |
| D. | none to these. |
