Problem $7$

Use the pipe sizes given the table below for the subdivision in Problem $6.$

Junction and Pipe Information:

$\backslash$table$[[$Pipe Information for Problem $7],[$Pipe Label,Dlameter $($mm$)],[$P$-1,200],[$P$-2,150],[$P$-3,150],[$P$-4,150],[$P$-5,150],[$P$-6,150],[$P$-7,150],[$P$-8,150],[$P$-9,150]]$

City ordinances require the following:

The pressure at the fire fow discharge and at other points in the distribution system cannot fall below $",12\mathrm{.}5$kPa during a fire flow of $34\frac{L}{s}.($Hint: The total flow at the fire flow node does not need to include the baseline demand$).$

Questions:

a$)$ If a residential fire occurs at $J-7,$ would the current system be able to meet the fire flow requirements set by the city?

b$)$ If not, what can be done to increase the available flow to provide adequate fire flow to that hydrant?

c$)$ If a fire flow is placed at J$-4,$ dos the system m$$et the requirements with the proposed improvements? Without the proposed improvements?