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Section 1, Power Boilers

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Section 1, Power Boilers

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Friendly Note:
These practice questions and answers are here to help you test your knowledge and get more comfortable with code concepts. Keep in mind that codes like ASME and NBIC are updated from time to time. That means an answer here might not always match the latest edition. Always double-check with the current Code and your local requirements when it really counts!

Mode 1 - PG1-PG31, Preamble

Question 1.1 - PG - 27.3

Q: When determining the MAWP of a cylinder under internal pressure, the value of ”t” represents ______?

a) minimum required thickness 
b) nominal thickness
c) ordered thickness 
d) actual thickness

a) minimum required thickness 

Question 1.2 - Preamble

Q: The scope of jurisdiction of Section I applies to the boiler proper, and to _________?

a) boiler proper piping 
b) superheaters 
c) economizers 
d) boiler external piping

d) boiler external piping

Question 1.3 - PG-27.2.2

Q: When pipe over NPS 5 is used for the shell of cylindrical components under pressure, its minimum wall shall be _____ thick?

a) 3/16″
b) 1/4″
c) 5/16″
d) 3/8

b) 1/4″

Mode 2 - PG32 - PG55

Question 2.1 - PG-39.5.1

Q: Where a threaded connection is to be made to a boiler component, it shall be made into a threaded hole. The threads shall conform to the requirements of ___________?

a) ASME B16.5 
b) ANSI B1.20.1 
c) ASME B16.25 
d) ASME B139-1995

b) ANSI B1.20.1 

Question 2.2 - PG-34.2

Q: A flanged-in manhole opening in a dished head shall be flanged to a depth of not less than __________ times the required thickness of the head, for plate up to _______in thickness.

a) 3, 2″
b) 2, 2″
c) 3, 1″
d) 3, 1-1/2

d) 3, 1-1/2

Question 2.3 - PG-39.6

Q: Expanded tube which meets the requirements for reinforcement may be inserted through a head provided the diameter does not exceed __________?

a) 3″ outside diameter
b) 6″ outside diameter
c) NPS 8
d) 4″ inside diameter

b) 6″ outside diameter

Mode 3 - PG58 - PG82

Question 3.1 - PG58 - PG82

Q: The barrel of a shell under internal pressure shall be circular at any section, within a limit of _____ of the mean diameter.

a) 1%
b) 2%
c) 1/2%
d) .0375(d)

a) 1%

Question 3.2 - PG-67

Q: Safety valves shall be designed and constructed to operate without chatter and to achieve full lift at a pressure no greater than _____ above their set pressure.

a) 1%
b) 2%
c) 3%
d) 4%

c) 3%

Question 3.3 - PG-61.1

Q: Feedwater sources shall be capable of supplying water to a watertube steam boiler with 1000-square-feet heating surface and a fixed water level, at a pressure of _____ higher than the highest safety valve setting. 

a) 1%
b) 2%
c) 3%
d) 4%

a) 

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