Question 10Steam Plants - Assistant Engineer

The correct answer is B) prevent the furnace filling with oil after restoration of power. Fuel oil solenoid valves at the burner fronts should be of the manual reset type to prevent the furnace from filling with oil after a power failure and subsequent restoration of power. This is a safety measure to avoid the risk of an uncontrolled oil spill or fire when power is restored. The manual reset requirement ensures the operator must physically check the burner and reset the solenoid valve before fuel oil can flow again, providing an additional safeguard. The other options are incorrect because A) and C) relate to securing the burner during or after a blackout, rather than preventing the furnace from filling with oil, and D) refers to preventing the furnace from filling during a power failure, rather than after power is restored.