I greatly appreciate any and all feedback from users in improving this guide. All of these updates are incorporated for future editions.

**2017 PE Prep Guide Errata**

*Versions 1.01 through 1.05 (version number noted on backside of first inside page):***Formula 2.6, 2.7:**Title for 2.6 should read "Lower Flam. Limit - Other Pressures". LFL for 2.6 is lower flammability limit "at any pressure". Title for 2.7 should read "Lower Flam. Limit - Normal Atm. Pressure".

**Formulas 2.12, 2.13:**Compartment mass ventilation rate should be in kg/s, not cu. m/s. Per SFPE (5th) p1007, cubic m/s x 1.18 kg/cu. m = kg/s.

**Formula 9.10:**Sp.G. is specific gravity of "liquid", not "gas".

**Question 21:**Mass ventilation rate should be in kg/s, not cu. m/s. Per SFPE (5th) p1007, cubic m/s x 1.18 kg/cu. m = kg/s. Answer is still c, but at 335 K.

**Question 32:**Assumed radiative fraction is listed at 25% but noted as assumed at 35%. 35% is more appropriate, resulting in a radiant flux of 2.4 kW/sqm.

**Question 77:**The T.T. Lie Equation (from SFPE 4th p4-350) was removed from SFPE (5th) Edition, so this question could not be used on the 2017 Exam.

**Question 106:**Solution should round to 500 gpm for flows above 2,500 gpm (per FPH 15-25). Solution becomes 3,000 gpm.

**Question 109:**The quick-reference charts from the SFPE 4th Edition were pulled from the 5th. C-factor should be given. See new problem and solution.

**Question 113**: Solution should read 50 occupants. See full solution.

**Questions 126, 143, 147, & 151:**The solution does not match the original question. Solutions: 126,

**143, 147, 151.**

*Versions 1.01 through 1.04 only:***Formulas 5.18-5.21:**References should be to page 13-377 and section A.10.6.2, not 13-339 and A.10.8.2.

**Question 49:**Thrust block should be calculated using the Outside Diameter (4.5 in), not the nominal diameter. Answer becomes 3,936 lbs.

**Question 101:**The solution does not match the original question. See full solution.

*Versions 1.01 through 1.03 only:***Question 5:**The probability tree is here: probability tree.

**Question 66:**The question should read "Which of the following

*do not*indicate deterioration of a battery?"

**Question 70:**The answer should be 10.2 square meters (b), not 12.2 square meters (c). The solution units should also be "kg/s".

*Versions 1.01 and 1.02 only:***Question 56:**The specific volume of the agent was calculated for HFC-125, not HFC-227ea. See updated solution.

**Question 57:**The specific gravity shown is irrelevant to the problem (it does not affect the solution).

**Question 110:**The agent's specific volume was calculated for HFC-125, not HFC-227ea. See updated solution.

**Question 121:**The worked portion of the ELADJ shows use of a 6-inch pipe, which should be 2.469. The solution is still correct.