Final answer:
The statement regarding the mandatory placement of safety shut-off valves outside the entrance to the room containing the burner is true. These valves are a critical safety feature allowing for the immediate cessation of oil flow in case of emergency, without entering the hazardous area.
Step-by-step explanation:
The statement that a safety shut-off valve must be provided to stop the flow of oil to any burner, and such control must be located outside the entrance to the room in which the burner is located, is true. These safety shut-off valves are crucial for preventing accidents in the event of a malfunction or an emergency.
If there's a need to stop the flow of oil quickly, having the control accessible from outside the burner room allows for a swift response to shut down the system. This placement ensures that in case of fire or other imminent danger within the room, the fuel supply can be cut off without the need to enter the potentially hazardous area. Safety precautions when working with burners include using them in a well-ventilated space, keeping flammable substances away, tucking in loose clothing, and ensuring long hair is tied back to prevent accidents.