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Assignment Questions - 14176_138
Assignment Questions - 14176_140

Neets Module 04-Introduction to Electrical Conductors, Wiring Techniques, and Schematic Reading
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5 1-28.   Latex rubber is a high-grade compound consisting of what percentage of unmilled grainless rubber? 1. 70% 2. 80% 3. 90% 4. 95% 1-29.   Plastic insulation is normally used for what levels of voltage? 1.     Very high to high 2.     High to medium 3.     Medium to low 4.     Low to very low 1-30.   When dealing with NEC type designators for thermoplastics, the letter "W" stands for what type of insulation? 1.     Oil-resistant 2.     Moisture-resistant 3.     Heat-resistant 4.     Asbestos 1-31.   When you work on synthetic insulated wiring, what safety precaution must be observed? 1.     Wear protective goggles at all times 2.     Avoid breathing the vapors when the insulation is heated 3.     Wear a dust mask in confined spaces 4.     Wear protective gloves if there are cuts or abrasions on your hands 1-32.   What nonmetallic material is most commonly used to protect wires and cables? 1.     Rubber 2.     Jute and asphalt covering 3.     Fibrous tape 4.     Fibrous braid 1-33.   What is the common name for woven covers? 1.     Yarn 2.     Loom 3.     Fibrous tape 4.     Unspun felted cotton 1-34.   What percentage of tin is used in alloy- lead sheathing? 1. 6% 2. 2% 3. 8% 4. 4% 1-35.   Why is the use of asbestos being discontinued as an insulating material in the Navy? 1.     It breaks down rapidly with continued use 2.     It is not as effective as other types of insulation 3.     It has not proven suitable for a shipboard environment 4.     It poses a health hazard to personnel 1-36.   What happens to asbestos insulation when it gets wet? 1.     Its insulation resistance becomes too high 2.     It emits dangerous fumes 3.     It acquires too great a dielectric strength 4.     It becomes a conductor 1-37.   What insulating materials are best suited for use with high voltage? 1.     Thermoplastic and rubber 2.     Varnished cambric and oil impregnated paper 3.     Teflon and silk 4.     Silk and cotton






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