Question

1. thermostatic traps:

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○ are typically on the return pipes near each radiator
○ are typically located at the end of the steam mains
○ are found on one pipe systems
○ they allow steam to pass but not air
○ have a life expectancy of 15 to 20 years

Explanation:

To solve this, we analyze each option based on knowledge of thermostatic traps:

• Option 1: Thermostatic traps are typically on return pipes near radiators (correct for their function in steam heating systems to release air and condensate while trapping steam).
• Option 2: End of steam mains is not typical for thermostatic traps (other traps like steam traps at mains ends have different functions).
• Option 3: Thermostatic traps are more associated with two - pipe systems, not one - pipe.
• Option 4: Thermostatic traps allow air (and condensate) to pass, not steam (they trap steam).
• Option 5: Their life expectancy is not typically 15 - 20 years (different from this claim).

Answer:

A. Are typically on the return pipes near each radiator