MASSACHUSETTS OIL BURNER LICENSE NEWEST 2024
ACTUAL EXAM TEST BANK 350 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
1. Where should a hot water temp operating control not be located? - ANSWER-Away from
the tankless coil
2. What are the requirements for pressure controls for boilers? - ANSWER-Line Voltage, (
Max 15 psi ) , Mounted on pigtail, and above water line.
3. What info on an oil burner certifies it has been approved by the Marshall? - ANSWER-
Mass Approval #
4. What is a scavenger period? - ANSWER-Pre + Post Purge
5. What are two methods used by domestic oil burners to prepare oil for combustion. -
ANSWER-Atomize & Vaporize
6. What is composition of #2 fuel oil? - ANSWER-85% carbon & 15% Hydrogen
7. What must be installed on gravity oil burners for safety? - ANSWER-Constant Level Valve
8. After a Thermostat has been installed what should be checked? - ANSWER-Level, Heat
Anticipator, Calibration
9. What is a Cad Cell ? - ANSWER-A light sensitive Resistor
10. What is the melting point of solder used on oil lines? - ANSWER-500 Degrees F
11. Why should you not allow an oil pump to create more then 12" of Vacuum? - ANSWER-
Cavitation
12. What parts are replaced on an annual tune-up? - ANSWER-Filter, nozzle, strainer, and
pump Gasket
13. When is alarm used on an oil tank? - ANSWER-When you can not tell what level while
filling
14. What info must be given when buying a new pump? - ANSWER-Rpm's, rotation, inlet
port, outlet port, and stage of pump?
15. Name 3 causes of delayed ignition ? - ANSWER-Weak Transformer, Bad Electrodes, and
bad spray pattern/clogged nozzle
16. What is the voltage output of an ignition transformer? - ANSWER-10,000 Standard &
14,000 Rotary
17. What determines the GPH of a nozzle ? - ANSWER-The Orriface
18. Inner parts of a nozzle can be changed? True? Or False? - ANSWER-False. You never
change the inner parts of a nozzle
, 19. What do we mean by differential with regards to a pressure trol? - ANSWER-Cut out &
Cut in
20. How many BTU's in a Gallon of #2 fuel oil? - ANSWER-140,000 Btu's
21. How is an electrical solenoid valve wired and where is it installed? - ANSWER-Wired in
parallel & installed to the motor
22. What is a series circuit? - ANSWER-One path for electrons to flow
23. What is a camium sulfide cell? - ANSWER-A visual Flame detector
24. How would you test the safety timing on a stack switch? - ANSWER-Disconnect T 3
25. Can material other then steel be used for construction of a light fuel oil tank? - ANSWER-
Yes if Approved
26. What are the requirements when installing two tanks together to a common supply line?
- ANSWER-Tanks must be level
27. What is the voltage found on the TT Terminals ? - ANSWER-24v
28. What gauge wire is used for a T Stat? - ANSWER-18 Guage
29. Is Carbon Monoxide a desirable flue gas? - ANSWER-Hell no!
30. What is the purpose of a low limit control on a steam or hot water boiler? - ANSWER-
Maintain boiler temperature for domestic
31. What is a by pass plug used for? - ANSWER-2 pipe system
32. How long after the completion of an installation must a certificate of completion be
submitted? - ANSWER-Within 72 hours
33. When must a low water cut off be used? - ANSWER-All steam boilers and hot water
boilers over 400,000 btu's
34. What is the flash point of #2 fuel oil ? - ANSWER-115
35. What is the minimum size oil line on a domestic system? - ANSWER-3/8 copper or black
maul able
36. Give two reasons for a high stack temperature? - ANSWER-To much air or sooted boiler
37. What is the greatest loss in a boiler? - ANSWER-Heat loss
38. How much air is needed in a confined space? - ANSWER-50 cubic feet per 1,000 BTU's
39. What is the max voltage of a burner circuit ? - ANSWER-150v
40. What is electrical continuity? - ANSWER-Complete path
41. What is a parallel circuit ? - ANSWER-More then one path for electrons to flow
42. What is the function of a draft regulator ? - ANSWER-To maintain a steady draft
43. What are the five parts of a Backarach smoke test kit? - ANSWER-Draft Gauge, Smoke
pump, Co2 analizer, thermometer, & effiency chart.
44. What are two reasons for a lockout on a stack switch with combustion established ? -
ANSWER-Dirty Helix or low stack temperature
45. What is the function of the hot contacts on a stack primary ? - ANSWER-Power the
motor
ACTUAL EXAM TEST BANK 350 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
1. Where should a hot water temp operating control not be located? - ANSWER-Away from
the tankless coil
2. What are the requirements for pressure controls for boilers? - ANSWER-Line Voltage, (
Max 15 psi ) , Mounted on pigtail, and above water line.
3. What info on an oil burner certifies it has been approved by the Marshall? - ANSWER-
Mass Approval #
4. What is a scavenger period? - ANSWER-Pre + Post Purge
5. What are two methods used by domestic oil burners to prepare oil for combustion. -
ANSWER-Atomize & Vaporize
6. What is composition of #2 fuel oil? - ANSWER-85% carbon & 15% Hydrogen
7. What must be installed on gravity oil burners for safety? - ANSWER-Constant Level Valve
8. After a Thermostat has been installed what should be checked? - ANSWER-Level, Heat
Anticipator, Calibration
9. What is a Cad Cell ? - ANSWER-A light sensitive Resistor
10. What is the melting point of solder used on oil lines? - ANSWER-500 Degrees F
11. Why should you not allow an oil pump to create more then 12" of Vacuum? - ANSWER-
Cavitation
12. What parts are replaced on an annual tune-up? - ANSWER-Filter, nozzle, strainer, and
pump Gasket
13. When is alarm used on an oil tank? - ANSWER-When you can not tell what level while
filling
14. What info must be given when buying a new pump? - ANSWER-Rpm's, rotation, inlet
port, outlet port, and stage of pump?
15. Name 3 causes of delayed ignition ? - ANSWER-Weak Transformer, Bad Electrodes, and
bad spray pattern/clogged nozzle
16. What is the voltage output of an ignition transformer? - ANSWER-10,000 Standard &
14,000 Rotary
17. What determines the GPH of a nozzle ? - ANSWER-The Orriface
18. Inner parts of a nozzle can be changed? True? Or False? - ANSWER-False. You never
change the inner parts of a nozzle
, 19. What do we mean by differential with regards to a pressure trol? - ANSWER-Cut out &
Cut in
20. How many BTU's in a Gallon of #2 fuel oil? - ANSWER-140,000 Btu's
21. How is an electrical solenoid valve wired and where is it installed? - ANSWER-Wired in
parallel & installed to the motor
22. What is a series circuit? - ANSWER-One path for electrons to flow
23. What is a camium sulfide cell? - ANSWER-A visual Flame detector
24. How would you test the safety timing on a stack switch? - ANSWER-Disconnect T 3
25. Can material other then steel be used for construction of a light fuel oil tank? - ANSWER-
Yes if Approved
26. What are the requirements when installing two tanks together to a common supply line?
- ANSWER-Tanks must be level
27. What is the voltage found on the TT Terminals ? - ANSWER-24v
28. What gauge wire is used for a T Stat? - ANSWER-18 Guage
29. Is Carbon Monoxide a desirable flue gas? - ANSWER-Hell no!
30. What is the purpose of a low limit control on a steam or hot water boiler? - ANSWER-
Maintain boiler temperature for domestic
31. What is a by pass plug used for? - ANSWER-2 pipe system
32. How long after the completion of an installation must a certificate of completion be
submitted? - ANSWER-Within 72 hours
33. When must a low water cut off be used? - ANSWER-All steam boilers and hot water
boilers over 400,000 btu's
34. What is the flash point of #2 fuel oil ? - ANSWER-115
35. What is the minimum size oil line on a domestic system? - ANSWER-3/8 copper or black
maul able
36. Give two reasons for a high stack temperature? - ANSWER-To much air or sooted boiler
37. What is the greatest loss in a boiler? - ANSWER-Heat loss
38. How much air is needed in a confined space? - ANSWER-50 cubic feet per 1,000 BTU's
39. What is the max voltage of a burner circuit ? - ANSWER-150v
40. What is electrical continuity? - ANSWER-Complete path
41. What is a parallel circuit ? - ANSWER-More then one path for electrons to flow
42. What is the function of a draft regulator ? - ANSWER-To maintain a steady draft
43. What are the five parts of a Backarach smoke test kit? - ANSWER-Draft Gauge, Smoke
pump, Co2 analizer, thermometer, & effiency chart.
44. What are two reasons for a lockout on a stack switch with combustion established ? -
ANSWER-Dirty Helix or low stack temperature
45. What is the function of the hot contacts on a stack primary ? - ANSWER-Power the
motor
