MCQOPTIONS
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| 1. |
*/*_Preheating of __________ the flame temperature.? |
| A. | The gaseous fuel before combustion decreases |
| B. | Combustion air decreases |
| C. | Either the fuel or the air or both, increases |
| D. | Either the fuel or the air does not affect |
| Answer» D. Either the fuel or the air does not affect | |