PE Problem #58

8/23/2018

A 52 ft long by 22 ft wide by 10 ft tall space contains high value historic newspapers in pervious metal storage. If the space is to be kept at 72 deg F and has fixed structures of 194 cubic feet, what minimum quantity of FM-200 agent would be required to protect the space in a full flood application if the design concentration is 6.7%?
a. 340 lb
b. 364 lb
c. 437 lb
d. Other

Solution | Posted 08/24/18

7 Comments

8/23/2018 09:23:18 am

Answer: d
Source: Problem 53 on page 177 of 2018 MeyerFire PE Prep Guide. When I run the information in the equation I get approximately 443 lbs.

8/23/2018 09:42:04 am

B
NFPA HB - p. 17-113, Eqn (1) and (2)

Jimmy

8/23/2018 09:49:15 am

B. I confess that my calculator batteries died so I used my phone. (I'm an old RPN guy, so the odds of an error go way up with an equals key involved!) Keep that in mind, folks: have a backup calculator during the exam. It would suck doing that many problems by hand.

Colleen

8/23/2018 09:50:37 am

I got B. 364 lb

per FPH 17-113 and 114,
weight required=V/S*(C/(100-C))
V=[52*22*10]-194=11,246
S=k1+k2*T. Using values of k for FM-200 and T of 72, get
S=1.879775+0.0046625*(72)=2.215
C, design concentration given in problem=6.7, plugging in values, I got a weight of 364 pounds of FM-200

8/23/2018 10:14:15 am

B
I didn't have my Handbooks nore Meyer with me, so I used the fine print under table A.5.5.1(i) in 2001.

David

8/23/2018 11:04:30 am

Pari

8/23/2018 11:33:34 am

B , I follow the example problem # 53 from Meyer fire book

Free Signup

Subscribe and learn something new each day:

Community

Thank You to Our Top May 2019 Contributors!

1. PETE
2. Mike
3. Wayne
4. Nimal
5. Wes

6. Clifford S.
7. Jon N.
8. Ivonn
9. Derrick
10. Jonathan

Your Post

The Toolkit

Sprinkler Designer or Engineer?

Get all of our tools, including the Sprinkler Database, Friction Loss Calculator, Fire Pump Analyzer and more:

FREE 30-DAY TRIAL

GET THE TOOLKIT

Filters

Exam Prep

2019 PE Prep Guide
(Available Now!)

PE Prep Series
(Available Now!)

Current Leaderboard

PE 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.

RSS Feed

Home - About - Blog - Contact - Exam Prep - Store

Copyright © 2019 MeyerFire, LLC
The views, opinions, and information found on this site represent solely the author shown and do not represent the opinions of any other party, nor does the presented material assume responsibility for its use. Fire protection and life safety systems constitute a critical component for public health and safety and you should consult with a licensed professional for proper design and code adherence. Some (not all) outbound links on this website, such as Amazon links, are affiliate-based where we receive a commission for orders placed elsewhere.