How is a rotary cup oil burner started and stopped?

• A. By adjusting the fuel flow
• B. Using a timer mechanism
• C. By means of a Pressuretrol
• D. With a manual switch

Answer: (C)

A rotary cup oil burner is typically started and stopped using a Pressuretrol. This device monitors the pressure within the system and can automatically control the operation of the burner based on the pressure readings. When the pressure in the system drops below a certain threshold, the Pressuretrol activates the burner, allowing it to start. Conversely, when the pressure reaches a predetermined level, the device will shut off the burner. This method is efficient for maintaining consistent operation, which is crucial for safe and effective heating in a variety of applications.

The other methods listed, while they may influence burner operation in different ways, are not the primary means of starting and stopping a rotary cup oil burner. Adjusting the fuel flow relates more to regulating burner output rather than initiating or halting operation. A timer mechanism is generally used for timed cycles rather than responsive operation based on system conditions. A manual switch requires human intervention and lacks the automatic regulation provided by a Pressuretrol, making it less efficient or practical for regular burner management.