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2024 International Mechanical Code
Chapter 14

IMC 2024

2024 International Mechanical Code

Chapter 14Solar Thermal Systems

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Question 1 1.

In a solar thermal system where all piping is part of the potable water distribution system and all components are listed for potable water use, which of the following is true regarding cross-connection protection?

Protection must be provided via a reduced pressure principle backflow preventer.
Cross-connection protection measures are not required.
Only a single check valve is required at the point of connection.
An air gap of at least 2 inches must be maintained at the supply.

Question 2 2.

Which specific standard must solar thermal collectors and panels be listed and labeled in accordance with?

ICC 900/SRCC 300
ICC 901/SRCC 100
NFPA 70
ASME Section VIII

Question 3 3.

Roof-mounted solar thermal equipment must be installed such that it does not obstruct or interfere with which of the following?

Only the main building entrance
Only neighboring property views
Chimneys, roof hatches, and smoke vents
Lightning protection systems only

Question 4 4.

Where must a relief device be located in a solar thermal system to ensure safe operation?

Only at the highest point of the collector array
At the system's lowest point to allow for drainage
So that no section can be valved off or isolated from it
Immediately downstream of the circulation pump

Question 5 5.

What is the minimum required horizontal slope for piping in a solar drain-back system to ensure proper manual gravity draining?

1/8 unit vertical in 12 units horizontal
1/4 unit vertical in 12 units horizontal
1/2 unit vertical in 12 units horizontal
1 unit vertical in 12 units horizontal

13 more questions in this chapter

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