How many inches of water column are equivalent to one pound of pressure?

Prepare for the Master Mechanical License Test with flashcards and multiple-choice questions. Each question includes hints and detailed explanations. Get confident for your exam!

One pound of pressure is equivalent to approximately 27.71 inches of water column. This conversion is based on the properties of water and the relationship between pressure and height in a fluid column. Specifically, one pound per square inch (psi) can support a column of water that is about 27.71 inches high due to the density of water and the effect of gravity.

The relationship holds true across various fluids and is important in the fields of HVAC (heating, ventilation, and air conditioning), plumbing, and other mechanical systems where pressure measurements are often necessary. Understanding this conversion allows professionals to interpret pressure readings effectively in terms of what they mean in real-world applications, particularly in systems relying on water columns for pressure measurement.

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