1 | Page
Oregon boilers Questions and Correct
Answers
Doubling the pipe size increases the pipe capacity by Ans: 4
times
What is the purpose of post weld heat-treating steel pipe? Ans: A-
prevent over stressing of the weld.
In ASTM A-53F pipe what does the letter F designate? Ans:
Furnace butt weld pipe
What is the max weld reinforcement allowed by ASME B31.1 Ans:
1/8 times the width of the weld.
What is the max weld undercut allowed by ASME B31.1 Ans: 1/32
of an inch
ASTM A-120 pipe may be used interchangeably with ASTM A 53-B
for steam service Ans: False
As an alternative to hydrostatic testing boiler external piping may
be pneumatically tested? Ans: True
Seal welding of pipe joints can be considered for strength
calculations Ans: False
© 2025 All rights reserved
, 2 | Page
NPS 2 1/2" pipe should have how many threads per inch? Ans: 8
threads per in h
Tack welds to remain in the joint may be left as welded Ans: True
High pressure boiler bottom blow-down piping between the boiler
and the required valve is Ans: Boiler external piping under ASME
B31.1
Steam piping system must have a safety valve after each pressure
reducer. Ans: True
To determine the pressure of column of water, multiply by Ans:
.433
What provides all the information needed to make sound welds for
ASME CODE SERVICE Ans: The employers qualified spec
A mixture of oil and oxygen under pressure will most likely. Ans:
All of the above- explode, cause a fire, ruin your day
Which type of valve should be used for throttling fluids and
quickly closing? Ans: Globe valve
May flange faces for steam be repaired by welding and machining?
Ans: No
© 2025 All rights reserved
Oregon boilers Questions and Correct
Answers
Doubling the pipe size increases the pipe capacity by Ans: 4
times
What is the purpose of post weld heat-treating steel pipe? Ans: A-
prevent over stressing of the weld.
In ASTM A-53F pipe what does the letter F designate? Ans:
Furnace butt weld pipe
What is the max weld reinforcement allowed by ASME B31.1 Ans:
1/8 times the width of the weld.
What is the max weld undercut allowed by ASME B31.1 Ans: 1/32
of an inch
ASTM A-120 pipe may be used interchangeably with ASTM A 53-B
for steam service Ans: False
As an alternative to hydrostatic testing boiler external piping may
be pneumatically tested? Ans: True
Seal welding of pipe joints can be considered for strength
calculations Ans: False
© 2025 All rights reserved
, 2 | Page
NPS 2 1/2" pipe should have how many threads per inch? Ans: 8
threads per in h
Tack welds to remain in the joint may be left as welded Ans: True
High pressure boiler bottom blow-down piping between the boiler
and the required valve is Ans: Boiler external piping under ASME
B31.1
Steam piping system must have a safety valve after each pressure
reducer. Ans: True
To determine the pressure of column of water, multiply by Ans:
.433
What provides all the information needed to make sound welds for
ASME CODE SERVICE Ans: The employers qualified spec
A mixture of oil and oxygen under pressure will most likely. Ans:
All of the above- explode, cause a fire, ruin your day
Which type of valve should be used for throttling fluids and
quickly closing? Ans: Globe valve
May flange faces for steam be repaired by welding and machining?
Ans: No
© 2025 All rights reserved
