3 A. Conductor size B. Material of conductor C. Load requirement D. Wire ductility E. Type of insulation F. Location of wire in circuit G. Source voltage Figure 1C IN ANSWERING QUESTION 1-14, REFER TO FIGURE 1C. 1-14.   Which of the following factors is used to determine the current rating of a wire? 1.     B, C, E, and G 2.     A, D, E, and G 3.     B, D, E, and F 4.     A, B, E, and F 1-15.   What types of insulation are best suited for use in a high-temperature environment? 1.     Cotton, polytetrafluoroethylene, and oiled paper 2.     FEP, silicone rubber, and extruded polytetrafluoroethylene 3.     Oiled paper, FEP, and rubber 4.     Rubber. polytetrafluoroethylene, and silk 1-16.   What is the "ambient" temperature of a conductor? 1.     It is the normal temperature of a conductor through which current is flowing 2.     It is the heat generated by external sources and affecting a conductor’s temperature 3.     It is the maximum heat a conductor can withstand according to its current rating 4.     It is the temperature at which the insulation of a conductor begins to break down 1-17.   Which of the following metals is the best conductor of current? 1.     Aluminum 2.     Copper 3.     Silver 4.     Manganin A. High cost B. High ductility C. High tensile strength D. Easily soldered E. Very light in weight F. Difficult to solder G. Reduces corona H. Generally uninsulated I. High conductivity Figure 1D FIGURE 1D LISTS SOME OF THE ADVANTAGES AND DISADVANTAGES OF VARIOUS CONDUCTORS. IN ANSWERING QUESTIONS 1-18 AND 1-19, REFER TO FIGURE 1D. 1-18.   When electricity is carried over long distances, which of the following are advantages for using aluminum as the conductor as opposed to copper? 1.     B and C 2.     D and E 3.     C and I 4.     E and G 1-19.   Which of the following are advantages for using copper as the conductor as opposed to aluminum? 1.     B, D, and I 2.     C, E, and G 3.     B, E, and H 4.     A, F, and I