ASME Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

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What is the minimum size for a hand hole in a boiler?

2" x 3"

2 1/2" x 3"

2 3/4" x 3 1/2"

The minimum size for a hand hole in a boiler is established to ensure proper access for maintenance and inspection while still maintaining the structural integrity of the boiler. The dimensions specified in various codes are based on the need to allow personnel to safely reach inside the boiler for cleaning, inspection, or any necessary repair without compromising safety.

The choice of 2 3/4" x 3 1/2" meets these criteria, as it provides sufficient clearance for a technician's hand and tools while aligning with the standards outlined in boiler and pressure vessel codes. This size allows for practical accessibility, ensuring that workers have the necessary room to maneuver when performing their tasks.

In contrast, the other options do not meet the accepted industry standards or may not adequately facilitate the required access for safe maintenance practices. Therefore, 2 3/4" x 3 1/2" is recognized as the optimal minimum size for a hand hole in a boiler setting.

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3" x 4"

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