Which of the following is not essential for maintaining proper fuel oil pressure?

Maintaining proper fuel oil pressure is critical for the efficient operation of a high-pressure boiler. Each of the other options focuses on factors directly related to the management of fuel oil pressure.

Checking pump functionality ensures that the fuel oil is being delivered to the burner at the required pressure. If the pump is not operating correctly, it can lead to insufficient pressure, causing improper combustion and potential boiler operational issues.

Ensuring the oil viscosity is correct is vital because viscosity affects the flow of fuel oil. If the viscosity is too high, it can resist flow and lead to insufficient pressure. Conversely, if it is too low, it can lead to excessive flow and pressure changes that compromise burner efficiency.

Monitoring the temperature of the fuel oil also plays a crucial role. Fuel oil needs to be at an optimal temperature for proper atomization and combustion. Temperature affects viscosity, and if the oil is too cold, it may not flow properly, impacting the pressure.

In contrast, obtaining the correct difference in pressure inside and outside the boiler, while important for overall boiler operation, does not directly pertain to maintaining fuel oil pressure. Fuel oil pressure specifically involves the conditions surrounding the fuel system rather than pressure differentials related to the boiler's overall operation. Recognizing