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HVACR Unit 55 - Oil Fired Heating Systems Comprehensive Questions with Verified Answers Graded A+

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HVACR Unit 55 - Oil Fired Heating Systems Comprehensive Questions with Verified Answers Graded A+

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HVACR Unit 55 - Oil Fired
Heating Systems
Comprehensive Questions with
Verified Answers Graded A+
List the grades of fuel oil and give a brief description of each. - Answer: Grade 1 : premium
quality of fuel oil mainly used in room space heaters relying on gravity flow which do not use
high pressure

Grade 2 : standard grade oil used in equipment that has pressure atomizing and forced air
furnaces and boilers



What is the difference between distillate oil and residual oil? - Answer: Distillate oil : evaporates
at low temperature, light distillates are clear and will pour like water at room temperature,
made up of lower carbon chains and oil grade 1

Residual oil : left in container at the end of the distillation process, black and tarry with
consistency like tooth paste at room temp, more carbon chains and oil grade 6



How are nozzles rated? - Answer: spray pattern, spray angle and gallons per house pass through



What does oil viscosity mean? - Answer: resistance offered by the oil to flow free



Which grade of oil has the highest viscosity? - Answer: grade 6

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