Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about _______________ °C ?
Correct answer: C. 90
- A. 50
- B. 70
- C. 90
- D. 140
Explanation
Medium-viscosity furnace oil is commonly preheated to about 90°C so its viscosity falls enough for proper atomisation through the burner. Excessive heating can create handling and safety problems, while insufficient heating gives coarse spray.
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