【Pump Technology Edition: Daily Question】February 25, 2020 (Section benefit: 10 wealth points as a reward for answering correctly before the answers are revealed)

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115. When a plane intersects a cylinder at an angle to its axis, the shape of the intersection curve is (  ).   A. Circle B. Ellipse C. Straight line D. Rectangle. Answer to question 114 on February 24, 2020: C. 114. A magnetoelectric tachometer measures rotational speed by utilizing the frequency of the pulsed induced electromotive force generated in a coil as a result of changes in the gap between gears and magnets. Its frequency is related to (C). A. Rotational speed B. Number of gear teeth C. Rotational speed and number of teeth (Answers will be released the day before they are officially announced; those who get it right before the announcement receive 10 wealth points, those who get it right after the announcement receive 5 wealth points, and those who participate receive 3 wealth points.) I’ve been a bit busy lately, so I’m slower at posting questions and providing feedback on answers. But no matter how busy or late it gets, I will still post things and respond to everyone. Thank you all for your continued support!