Massachusetts Plumbers Journeyman Practice Exam

How should the discharge from devices like condensate pumps or air conditioning equipment be calculated for drainage purposes?

1. A. In cubic feet per minute

2. B. In gallons per minute

3. C. In square feet of roof area per minute

4. D. As linear feet of drainage pipe

The correct answer is: C. In square feet of roof area per minute

For drainage purposes, the discharge from devices like condensate pumps or air conditioning equipment should be calculated in gallons per minute. This measure allows for the proper sizing and design of the drainage system, ensuring that it can handle the volume of water produced by the equipment efficiently. Calculating discharge in cubic feet per minute would not provide the appropriate measurement for typical plumbing applications, as flow rates are commonly expressed in gallons. Similarly, evaluating discharge in square feet of roof area is more relevant for stormwater calculations rather than for the flow from condensate or AC equipment. Lastly, considering linear feet of drainage pipe does not account for the volume of water being discharged and is not an appropriate method for determining flow rates. Thus, the correct approach is to use gallons per minute as it directly relates to the actual volume of water being handled.