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2024 International Mechanical Code
Chapter 10: Boilers Water Heaters And Pressure Vessels

Quiz: 2024 International Mechanical Code Chapter 10: Boilers Water Heaters And Pressure Vessels

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1. Which of the following pressure vessels is exempt from the requirements of Chapter 10 of the International Mechanical Code?

Pressure vessels used for heated water supply
Unfired pressure vessels with a volume of 5 cubic feet operating at 200 psi in a Group B occupancy
Pressure vessels used in refrigeration systems regulated by Chapter 11
Containers for bulk oxygen and medical gas

2. What is the specific listing standard required for oil-fired water heaters?

UL 174
UL 1453
UL 732
UL 726

3. In a combination potable water and space-heating system, what is the maximum temperature allowed for the potable hot water distribution system before a temperature-actuated mixing valve is required?

120°F
140°F
160°F
180°F

4. Plastic pans installed under water heaters to prevent leakage damage must have a flame spread index and smoke-developed index of not more than what values, respectively?

25 and 50
50 and 450
25 and 450
75 and 450

5. Welding on pressure vessels must be performed by an individual or entity holding which specific certification?

S-Stamp holder
U-Stamp holder
R-Stamp holder
Certified Master Welder

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