OREGON BOILERS EXAM NEWLY UPDATED COLLECTION OF EXAM
QUESTIONS AND VERIFIED ANSWERS DESIGNED TO GUARANTEE
YOUR SUCCESS ON THE LATEST TEST VERSION
1. What is the minimum size of a bottom blowdown line for a boiler?
ANSWER ¾ inch NPS
2. What is the maximum size of a bottom blowdown line for a boiler?
ANSWER 2-½ inches NPS
3. How many slow-opening valves are required if the bottom blowdown valve is
larger than 2 inches?
ANSWER Two slow-opening valves or one slow-opening valve with one
quick-opening valve
4. What is the minimum pressure for a boiler to be classified as a high-pressure
boiler in Oregon?
ANSWER Over 15 psi steam or over 160 psi water with temperature over
250°F
5. What is the minimum temperature at which water is considered hot water for
high-pressure boilers?
ANSWER Over 250°F
6. Who must witness the hydrostatic test on a boiler in Oregon?
ANSWER An Oregon Deputy Boiler Inspector
7. What is the hydrostatic test pressure for a low-pressure steam boiler?
ANSWER 1.5 times MAWP, but not less than 45 psi at the highest point
8. What is the hydrostatic test pressure for a high-pressure boiler?
ANSWER 1.5 times MAWP
,9. How long must a hydrostatic test be held?
ANSWER Minimum of 5 minutes or as long as required by the inspector
10. What is the ASME Code section for Power Boilers?
ANSWER Section I
11. What is the ASME Code section for Heating Boilers?
ANSWER Section IV
12. What is the ASME Code section for Controls and Safety Devices?
ANSWER CSD-1
13. What does MAWP stand for?
ANSWER Maximum Allowable Working Pressure
14. What is the minimum size of a safety valve discharge pipe?
ANSWER Shall not be smaller than the valve outlet
15. Safety valves on high-pressure boilers must be what type?
ANSWER Direct spring-loaded, full nozzle, open discharge
16. How often must safety valves be tested by hand in service?
ANSWER At least once every 30 days when operating
17. How often must safety valves be popped at full pressure?
ANSWER Annually by a qualified person or VR stamp holder
18. What is the maximum setting of a safety valve on a high-pressure boiler?
ANSWER Not to exceed MAWP
19. How many safety valves are required on a high-pressure steam boiler?
ANSWER At least one (two if over 500 sq ft of heating surface)
20. What is the minimum distance a safety valve discharge must terminate from
a walkway?
ANSWER 7 feet above the walkway
21. What type of fuel requires a listed combustion safety control per CSD-1?
ANSWER Gas or oil
, 22. What is the purpose of a low-water fuel cutoff?
ANSWER To shut off fuel to the burner if water level drops too low
23. How many low-water cutoffs are required on a high-pressure steam boiler?
ANSWER Two (one must be a manual reset type)
24. Where must the low-water cutoff be installed?
ANSWER Above the lowest permissible water level as determined by the
manufacturer
25. What is the blowdown requirement for a low-water cutoff on a steam boiler?
ANSWER Must be blown down daily when boiler is in operation
26. What is the maximum water temperature allowed in a low-pressure hot
water heating boiler?
ANSWER 250°F
27. What is the maximum working pressure for a low-pressure hot water
heating boiler?
ANSWER 160 psi
28. What is the maximum pressure for a low-pressure steam heating boiler?
ANSWER 15 psi
29. How often must an internal inspection be performed on a high-pressure
boiler?
ANSWER Every 12 months (unless extended by insurance company or state)
30. How often must an external inspection be performed while under pressure?
ANSWER Annually
31. Who can perform repairs on a boiler in Oregon?
ANSWER Only a company holding a valid Oregon Boiler Contractor License
or an “R” stamp
32. What does NBIC stand for?
ANSWER National Board Inspection Code
33. What is a “VR” stamp?
QUESTIONS AND VERIFIED ANSWERS DESIGNED TO GUARANTEE
YOUR SUCCESS ON THE LATEST TEST VERSION
1. What is the minimum size of a bottom blowdown line for a boiler?
ANSWER ¾ inch NPS
2. What is the maximum size of a bottom blowdown line for a boiler?
ANSWER 2-½ inches NPS
3. How many slow-opening valves are required if the bottom blowdown valve is
larger than 2 inches?
ANSWER Two slow-opening valves or one slow-opening valve with one
quick-opening valve
4. What is the minimum pressure for a boiler to be classified as a high-pressure
boiler in Oregon?
ANSWER Over 15 psi steam or over 160 psi water with temperature over
250°F
5. What is the minimum temperature at which water is considered hot water for
high-pressure boilers?
ANSWER Over 250°F
6. Who must witness the hydrostatic test on a boiler in Oregon?
ANSWER An Oregon Deputy Boiler Inspector
7. What is the hydrostatic test pressure for a low-pressure steam boiler?
ANSWER 1.5 times MAWP, but not less than 45 psi at the highest point
8. What is the hydrostatic test pressure for a high-pressure boiler?
ANSWER 1.5 times MAWP
,9. How long must a hydrostatic test be held?
ANSWER Minimum of 5 minutes or as long as required by the inspector
10. What is the ASME Code section for Power Boilers?
ANSWER Section I
11. What is the ASME Code section for Heating Boilers?
ANSWER Section IV
12. What is the ASME Code section for Controls and Safety Devices?
ANSWER CSD-1
13. What does MAWP stand for?
ANSWER Maximum Allowable Working Pressure
14. What is the minimum size of a safety valve discharge pipe?
ANSWER Shall not be smaller than the valve outlet
15. Safety valves on high-pressure boilers must be what type?
ANSWER Direct spring-loaded, full nozzle, open discharge
16. How often must safety valves be tested by hand in service?
ANSWER At least once every 30 days when operating
17. How often must safety valves be popped at full pressure?
ANSWER Annually by a qualified person or VR stamp holder
18. What is the maximum setting of a safety valve on a high-pressure boiler?
ANSWER Not to exceed MAWP
19. How many safety valves are required on a high-pressure steam boiler?
ANSWER At least one (two if over 500 sq ft of heating surface)
20. What is the minimum distance a safety valve discharge must terminate from
a walkway?
ANSWER 7 feet above the walkway
21. What type of fuel requires a listed combustion safety control per CSD-1?
ANSWER Gas or oil
, 22. What is the purpose of a low-water fuel cutoff?
ANSWER To shut off fuel to the burner if water level drops too low
23. How many low-water cutoffs are required on a high-pressure steam boiler?
ANSWER Two (one must be a manual reset type)
24. Where must the low-water cutoff be installed?
ANSWER Above the lowest permissible water level as determined by the
manufacturer
25. What is the blowdown requirement for a low-water cutoff on a steam boiler?
ANSWER Must be blown down daily when boiler is in operation
26. What is the maximum water temperature allowed in a low-pressure hot
water heating boiler?
ANSWER 250°F
27. What is the maximum working pressure for a low-pressure hot water
heating boiler?
ANSWER 160 psi
28. What is the maximum pressure for a low-pressure steam heating boiler?
ANSWER 15 psi
29. How often must an internal inspection be performed on a high-pressure
boiler?
ANSWER Every 12 months (unless extended by insurance company or state)
30. How often must an external inspection be performed while under pressure?
ANSWER Annually
31. Who can perform repairs on a boiler in Oregon?
ANSWER Only a company holding a valid Oregon Boiler Contractor License
or an “R” stamp
32. What does NBIC stand for?
ANSWER National Board Inspection Code
33. What is a “VR” stamp?
