Mechanical Engineering Unit 57 Unit Review Questions Answer Keygo Back Index What Factors Should Considered When

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UNIT 57 REVIEW QUESTIONS ANSWER KEY GO BACK TO INDEX

57-1) What factors should be considered when selecting an oil fired furnace?

57-2) What is the proper service clearance that should be allowed when installing a

furnace?

57-3) What is the firing rate of a furnace with a Beckett AFG-FG burner and a 0.75 gph

70-B nozzle? (refer to Table 57-1)

55-4) What is the heating capacity of an 80% efficient furnace with a Beckett AFG-FG

burner and a 0.75 gph 70-B nozzle? (refer to Table 57-1)

57-5) What would be the required vacuum for an oil furnace located 5 feet above the oil

tank with a horizontal run of 20 feet?

57-6) What national standard is a good reference when installing oil furnaces?

57-7) What free air opening would be required for an oil furnace installed in a confined

space if the air was coming through horizontal ducts and the furnace had a Beckett

AFG-FG burner and a 0.65 gph 70-W nozzle? (refer to Table 57-1)

57-8) Calculate the equivalent length of a 6 inch diameter chimney connector with two

57-9) How high must the chimney be above the connector entrance for the connector in

question 8 to operate properly?

57-10) What type of material must be used for chimney connector in a crawlspace?

57-11) Describe where the barometric damper should be installed in the chimney

connector.

57-12) How would the primary control need to differ to accommodate power venting?

57-13) What is a disadvantage to direct venting an oil fired furnace?

57-14) What problems can arise from an oversized oil storage tank?

57-15) How much fuel should a properly sized oil storage tank hold?

57-16) What is the function of an oil safety valve?

57-17) Give a pre-start checklist when checking a newly installed oil furnace.

That the correct nozzle size has been selected for desired input rate.

All shipping supports are removed.

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Reset button on the primary control is pushed down.

Flame observation door and all cleanout access covers are closed.

The thermostat is set to HEAT at a temperature higher than the room.

57-18) What measurements should be taken when setting up a new oil furnace?

57-19) What national publication is a good reference for chimney construction?

57-20) What types of appliances may oil furnaces be common vented with?