MCQOPTIONS
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MCQOPTIONS
| 1. |
Which substance is used to retard the setting action of cement? |
| A. | \[CaO\] |
| B. | \[A{{l}_{2}}{{O}_{3}}\] |
| C. | \[CaS{{O}_{4}},2{{H}_{2}}O\] |
| D. | \[N{{a}_{2}}O+{{K}_{2}}O\] |
| Answer» D. \[N{{a}_{2}}O+{{K}_{2}}O\] | |