I greatly appreciate any and all feedback from users in improving this guide. The 2020 Edition of the PE Prep Guide had major updates across the removal of the handbooks and new standard references. All of these updates are shown below for your aid in preparing for the exam and are also incorporated in future editions of the Prep Guide.

**2020 PE Prep Guide Errata:**

**Formula 2.53 (p54):**The simplified equation is from FPH 3-154, which has a constant that is different than SFPE p406 and NCEES 3.4.7. The constant for the mean velocity of the plume should be 1.03 m^(4/3)s^(-1)kW^(-1/3), not 0.77 as in FPH.

**Problem 24 (p124)**: The solution for the problem as given should be 1.1 seconds, which is not an available answer. The flame spread rate in the solution should be 0.35 m/s, not 0.035 m/s. The resulting solution then becomes 1.1 seconds.

**Problem 31 (p136)**: The pipe schedule should be specified as Schedule 40. The solution remains the same.

**Problem 45 (p156)**: The answers should be in pounds (lb) and not kilograms (kg).

**Problem 105 (p222 and 242)**: The third answer should read

*Gypsum, 5/8-inch*and not

*Type X Gypsum, 5/8-inch*.

**Problem 125 (p265)**: The solution uses a higher foam concentration rate than the original problem. The correct solution is here.

**Problem 145 (p285)**: The solution uses the mean velocity of plume equation from FPH 3-154, which has a constant that is different than SFPE p406 and NCEES 3.4.7. The constant for the mean velocity of the plume should be 1.03 m^(4/3)s^(-1)kW^(-1/3), not 0.77 as in FPH.

[End of Errata]