Is anyone aware of a forum or website, or any resource that offers a detail review of Version 3.1 of NCARB's Practice tests?
I have seen a few of questions that seems relevant to PDD, some of which I could not understand how they arrived at the answer. Here is one, if any one can help, i would appreciate it.
Lateral Forces ARE Study Guide: Multiple Choice Version 3.1 (Page 39, Question 4)
4. The diagram below shows an exterior exit door, 3' 0" x 7' 0" [910 x 2100],
subject to a net positive wind pressure of 20 psf [1.0 kN/m2, unfactored].
What force must be exerted at the center of the door to open it?
F 210 lb [0.95 kN]
F 420 lb [1.9 kN]
F 630 lb [2.9 kN]
F 840 lb [3.8 kN]
When I did this, i got 630ibs using the formula F=M/S. But the correct answer is 420!!!
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