MCQOPTIONS
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MCQOPTIONS
| 1. |
What type of retarder is Calcium Lignosulfonate (HR means Halliburton retarder)? |
| A. | HR-4 lignin type |
| B. | HR-20 gypsum type |
| C. | HR-13 gypsum type |
| D. | HR- 6L lignox type |
| Answer» B. HR-20 gypsum type | |