Mechanical and Electrical Systems in Buildings (Questions and Answers)

NOTE: Show all calculations or explanations in the space provided or on the next page.  Use info/factors from your text.

1. Select a water main to deliver 150 GPM to a school. Limit flow velocity to 6 feet per second. What is the expected friction loss?

2. For a residence answer the following:

                        What size is the most common water supply meter?

                        What size sewer line is typically required outside the building line?

                        What is the minimum quantity and size of VTR?

                        Where can a 3/8” water supply be used?

3. What is the difference between a wet pipe and dry pipe sprinkler system?

4. Calculate the Total Water Demand for a sprinkler and standpipe system given the following information:

                        22,000sf office w/ an Ordinary 1 Hazard Classification

                        Area of sprinkler  operation is 3,000sf

                        Hose demand includes both inside & outside locations

                        An overage factor of 1.2 is required\

5. Steel pipe will be used for HVAC piping. The water demand is 200gpm, head loss is 2’/100’ and maximum water velocity is 5 feet per second.  What is the minimum size of steel pipe required?  If you changed to copper pipe, what would the minimum size be?