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Across 3. Temp at which all thermal switches and valves trip 4. Next to last component of the nozzle oil travels through 5. Temp at which flue gases will start to condense 6. A cast-iron boiler that is dry fired could _____ 11. Btu's in 1 gal. of fuel oil 13. Key final adjustment for most oil burners 14. A cause of pulsating oil pump pressure and a pulsating fire is air leaks in the ______ line 15. A stack switch requires ______ conduit 16. Type of furnace that requires plastic piping and acidic protection 17. To convert a oil pump to a two pipe system an internal ______ plug must be installed 18. The difference between cut-in and cut-out of an oil pump 22. Contains the flame and maintains a burn (combustion -what-) 24. UL standard for storage tank above 660 gal 26. Minimum gauge oil tank 29. The combination of elements found in fuel oil 32. Material used for oil supply and return lines 34. Installed to remedy high viscosity 35. Fuel introduced to the combustion chamber before ignition (type of ignition) 37. The name of the lowest temp at which vapors in air above fuel ignite for short period of time when exposed to flame 40. Service switch must be within how many feet of the burner 42. Oil burners that produce smoke also produces ____ 43. UL standard for storage tank 660 gal or less

Down 1. Two problems a vacuum test will reveal is air leas and ______ in the pipe 2. Draft ______ when its hotter outside 3. Maximum allowed voltage for an oil burner circuit 5. The flow rate on the nozzle is based on ___ psi 7. Type of fuel delivery set-up that requires a check valve on the supply line of an oil tank 8. Minimum distance from burner to tank 9. The lower end of the vent pipe may never extend more then how much into the tank 10. Used to get the proper amount of air flow through the burner 11. Lock out time of a burner firing 3.1-20 gph 12. Joints that allow movement in the piping 19. As more air is added to the fire, the draft reading ______ 20. Distance above grade vent pipes must be 21. Lockout time of a burner firing less than 3GPH 23. The flash point of #2 fuel oil 25. Outside tanks must be protected by atmospheric corrosion and ______ damage 27. Amount of time fire restive assemblys must protect tanks 28. Finest mesh screen size allowable on a vent pipe 30. Increasing the fuel pump pressure will ______ the flow rate 31. Minimum distance above grade for vent pipes 33. About 21% of air is made up of this 36. Maximum length of flexible conduit that can be used on an oil burner 38. Changing what pressure changes the GPH of the nozzel 39. Type of boiler that requires a low water cut-off 40. Minimum size oil line 41. Where should return lines be connected to the tank