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Section IV, Heating Boilers

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Section IV, Heating 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 - Part HG

Question 1.1 - HG 301.2 (a)

Q: When determining the required thickness of tubes under external pressure (not strength-welded), a minimum additional thickness of _______?

a) 0.035″
b) 0.10″
c) 0.4″
d) d) 10% of the required thickness

c) 0.4″

Question 1.2 - HG 301.1

Q: A steam heating boiler is to operate at an internal pressure not exceeding 15 psi. What is the minimum value of “P” to be used when calculating the shell or head?

a) 15 psi
b) 30 psi
c) 60 psi
d) 160 psi

b) 30 psi

Question 1.3 - HG-200.7

Q: When non-pressure parts are welded to pressure parts, the allowable stress value shall not exceed? 

a) 50%
b) 65%
c) 75%
d) 80%

d) 80%

Mode 2 - Introduction, Part HG

Question 2.1 - HG 101.2

Q: When boiler service conditions exceed the limits specified in HG-101.1, ____________?

a) the rules of Section I apply 
b) the boiler may still be “H” stamped provided all other requirements are met
c) the boiler may be stamped either “H” or “S”
d) the jurisdiction may_authorize “H” stamp application

a) the rules of Section I apply

Question 2.2 - Introduction

Q: When Section IV does not provide rules to cover a particular detail of design and construction, it is intended that the manufacturer, subject to the acceptance of the _________, provide such details which will be as safe as otherwise required.

a) authorized inspector
b) jurisdictional authority
c) owner
d) insurance carrier

a) authorized inspector

Question 2.3 - HG 312.1

Q: When forming plain cylindrical furnaces, the maximum deviation from a true circle shall not exceed?

a) 1% nominal inside diameter
b) 2% nominal inside diameter
c) 1/8″
d) 1/4″

d) 1/4″

Mode 3 - Part HG, Article 2 (Design)

Question 3.1 - HG-312.6

Q: When designing a Morison corrugated furnace, the value of thickness “t” shall not be less than _______?

a) 5/16″
b) 3/8″
c) 7/16″
d) 1/2″

a) 5/16″

Question 3.2 - Part HG, Article 2

Q: Handhole openings shall not be less than?

a) 2″ X 3″
b) 2-3/4″ X 3-1/2″
c) 3-1/4″ X 4-1/2″
d) NPS 4

b) 2-3/4″ X 3-1/2″

Question 3.3 - HG-340.3

Q: What is the maximum pitch of stays, other than the welded-in type?

a) 6″
b) 80% of a welded-in stay of the same diameter
c) 8-1/2″
d) 15 diameters of the stay

c) 8-1/2″

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