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Self-Test 1 Q&A 4-1
Self-Test Questions Volume 1
| Question | Answer |
|---|---|
| Define wire | A thin rod of hard or soft drawn metal. In electrical work, this metal is one that conducts easily, such as copper or aluminum |
| Define conductor | A bare or insulated wire or group of wires not insulated from each other and that is suitable for carrying an electrical current |
| What is the difference between a solid and a stranded conductor | A solid conductor is a single wire; a stranded conductor is a group of single wires twisted together to form a single conductor |
| Of the materials used for conductors today, which is the best | Copper |
| What is the size range of the American wire gauge (AWG)? | No. 40, the smallest, to No. 4/0, the largest |
| Which is the larger conductor, a No. 2 AWG or a No. 20 AWG? | No. 2 AWG |
| How are conductors larger than No. 4/0 AWG sized and numbered? | They are sized according to cross-sectional area and numbered according to thousand circular mils |
| Why are larger conductors stranded? | For flexibility |
| What do the following letters mean when used for marking insulation types? TA; RH; THW; | TA-thermoplastic and asbestos; RH-heat-resistant rubber; THW-moisture and heat-resistant thermoplastic |
| Why do conductors in conduit or cable have smaller amperage ratings than the same conductors run in free air? | Conductors in free air can get rid of heat caused by current flow much faster than if they were in conduit or cable. |
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RenegadeWolf
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