Question

1. thermostatic traps:

(c) 2009 inspectapedia.com
〇 are typically on the return pipes near each radiator
〇 are typically located at the end of the steam mains
〇 are found on one pipe systems
〇 they allow steam to pass but not air
〇 have a life expectancy of 15 to 20 years

Explanation:

To solve this, we analyze each option:

• Option 1: Thermostatic traps are typically on return pipes near radiators (correct for their function in steam systems to control condensation/steam, located near radiators on return pipes).
• Option 2: End of steam mains is not typical for thermostatic traps (usually for other types like bucket traps).
• Option 3: One - pipe systems don't typically use thermostatic traps (two - pipe systems are more common for them).
• Option 4: Thermostatic traps allow air to pass (not steam) initially, so this is incorrect.
• Option 5: Their life expectancy is not typically 15 - 20 years (more like 5 - 10 or other ranges, and this is not a defining feature of thermostatic traps).

Answer:

A. Are typically on the return pipes near each radiator