| Q.55 | Among the following kilns, the most energy efficient and environment friendly, according to the Central Pollution Control Board, is the __________. | |
| Ans | 1. Fixed Chimney Bull’s Trench Kiln | |
| 2. Vertical Shaft Brick Kiln | ||
| 3. High Draught Kiln | ||
| 4. Movable Chimney Bull’s Trench Kiln |
Correct Ans Provided: 2