Many people skip these. In Frankenfield, the review questions often introduce new applications or combine concepts from two chapters ago. They force you back to earlier sections. Use a separate notebook. If you can't answer a question, use the PDF search to find the relevant section (the index in scanned PDFs is often unclickable, so manual search is required).
A vertical press drifts down 1 inch every 10 seconds when the pump is running, but holds fine when the pump is off. using industrial hydraulics frankenfield pdf