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What would be the input of a 0.60-gph-oil nozzle?

  1. 73 MBtu

  2. 70 MBtu

  3. 84 MBtu (140 000 x .60)

  4. 50 MBtu

The correct answer is: 84 MBtu (140 000 x .60)

The input of a 0.60-gph-oil nozzle can be calculated using the formula that relates the flow rate of the fuel oil to its heating value. This formula is typically expressed as: Input (in MBtu) = Flow rate (in gallons per hour) x Heating value (in BTU per gallon). For fuel oil, the common heating value is approximately 140,000 BTU per gallon. Therefore, for a 0.60 gallons per hour (gph) nozzle, the calculation would be: Input = 0.60 gph x 140,000 BTU/gallon = 84,000 BTU or 84 MBtu. This calculation shows that option C is correct because it accurately reflects the conversion from gallons per hour to million BTUs (MBtu) using the established heating value for fuel oil. Understanding this process is crucial for gas fitters, as it helps in designing and assessing heating systems efficiently.