PDD Review Exam Questions & Answers 2024/2025

PDD Review Exam Questions & Answers 2024/2025 What is the SPEED equivalent of 1 G force? - ANSWERS32 feet per second. What is the MINIMUM G force of seismic that will begin to damage poorly constructed buildings? - ANSWERS0.1 g In an earthquake, why is CONTINUOUS MODERATE SHAKING worse than SHORT INTENSE SHAKING? - ANSWERSBecause more back-and-forth shakes = more wigging everything loose. [THIS TERM] refers to the EFFECTIVE time duration of an earthquake, which is measured ONLY when the shaking is above a certain threshold? Also, what is that threshold (in Gs)? - ANSWERSBRACKETED DURATION 0.05 G Which kinds of soil amplify earth shaking more? Soft soil or hard rock soil? - ANSWERSSOFT soil, by a huge margin of 5 or 6. Thus, quake damage is worse in places with SOFT ground. When you build on SOFT SOIL, how do the codes require you to modify the design? - ANSWERSMake the building STRONGER AGAINST LATERAL, and with stronger foundations. SOFT SOIL = MORE SEISMIC AMPLIFICATION = MORE SEISMIC ACTION What is the unit HERTZ measuring? - ANSWERSHERTZ is Oscillations/Period PER SECOND.