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Article: Answering technical questions (part I). (Shop Talk).
- Article from:
- Outdoor Power Equipment
- Article date:
- September 1, 2002
- Author:
CopyrightCOPYRIGHT 2002 Bev-AL Communications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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When you are studying for an OPE certification exam, do you often wonder why a certain answer on the sample test questions is the correct one? In this article, I am going to cover several questions that are designed to help you think through and reason out the correct answer.
Question #1: Do batteries freeze more easily when they are fully charged or discharged?
Before answering this question, let's review some battery basics. As you may recall, the electrolyte in a battery is composed of 64 percent water ([H.sub.2]O) and 36 percent sulfuric acid ([H.sub.2][SO.sub.4]). The sulfuric acid reacts with the lead oxide ([PbO.sub.2]) plate in the battery to ...