A project site is connected to a water tank through an equivalent 650 feet of 6-inch schedule 10 pipe (c-factor of 140). If the water tank is 165 feet above the project site, the fire flow available at the project site is most nearly: a. 1,300 gpm b. 2,100 gpm c. 2,400 gpm d. 8,700 gpm Solution | Posted 10/10/18
10 Comments
Vince
10/9/2018 08:19:21 am
1,300 @ 49.39
Reply
Jimmy
10/9/2018 06:24:02 pm
A. My logic would be to say Pt=71.46psi. Pv + Pp at the given flows are 23.4 psi, 56.7 psi, 73 psi and 748 psi. What's the required delivery pressure? You end up @ 54psi, 17.5psi, 0, & impossible. Any answer below 54 psi won't spray for beans--not exactly useful to fight a fire, right?
Reply
FPE
10/9/2018 10:05:47 am
c. 2,400 gpm,
Reply
Pari
10/9/2018 11:08:45 am
C ,2400 gpm
Reply
Vince
10/9/2018 12:43:32 pm
Friction loss in 650 ft of 6" @ 140 =22.22 psi. Doesn't that play a part here?
Reply
migdalia guzman
10/9/2018 11:47:27 am
C, 2400 GPM
Reply
MHK
10/9/2018 07:32:52 pm
b. 2,100 gpm
Reply
Ed
10/9/2018 09:44:00 pm
c. if you are supplying a pump (much higher full than that and the pressure at the pump suction would drop below zero). Without a pump it would be a. or b. depending on the sprinkle systems required pressure. I used Hazen Williams and solved for the the three lowest flow rates individually. Is there a direct way to solve?
Reply
AJ
10/11/2018 09:13:04 am
Are these the same problems as in the Meyer PE Guide?
Reply
Joe Meyer
10/11/2018 09:58:08 am
Hi AJ,
Reply
Leave a Reply. |
Free SignupSubscribe for posts on PE Problems and Daily Discussions, straight to your inbox, for free:
CommunityThank You to Our Top January '19 Contributors:
Your PostAsk your question here (members area)
SearchAll-AccessGet all-access to the downloadable Toolkit, Sprinkler Database, Ask-A-Question and more.
Filters
All
Archives
February 2019
Daily
Daily discussion questions are open-ended questions posed by members for the benefit of sharing expertise and learning from other perspectives. Join as a member here.
Exam PrepPE Problems
Visit July-October for daily Fire Protection PE Exam sample questions.
Solutions are posted the day after posting. Comment with your solutions, questions or clarifications. Please note that questions posted are unofficial and in accordance with NCEES rules are intended to be similar to actual exam questions, not actual exam questions themselves. |