2 1-8.   If you have a 12-strand conductor and each strand has a radius (one half the diameter) of 2/10 inch, what is the circular mil area of the conductor? 1.    1,920,000 cir. mil 2.         57,680 cir. mil 3.        48,000 cir. mil 4.          2,400 cir. mil 1-9.   What is the square mil area for the conductor explained in question 1-8? 1.    244,344,097 sq. mil 2.        1,507,965 sq. mil 3.            61,115 sq. mil 4.           45,239 sq. mil 1-10.   What is the definition of specific resistance? 1.  The resistance of a length of conductor, at a given temperature, to voltage 2.  The resistance of a cross-sectional area of a conductor, at a given temperature, to the flow of current 3.  The resistance of a unit volume of a substance to the flow of current expressed in ohms 1-11.   What factor(s) must be known to compute the resistance of a conductor? 1.     The length of the conductor 2.     The cross-sectional area of the conductor 3.     The specific resistance of the substance of the conductor 4.     Each of the above THIS SPACE LEFT BLANK INTENTIONALLY. Gage Number Ohms per 1,000 ft. Pounds per 1,000 ft. 25 deg. C 65 deg. C 6 .403 .465 79.5 7 .508 .586 63.0 8 .641 .739 50.0 9 .808 .932 39.6 10 1.020 1.180 31.4 11 1.280 1.480 24.9 12 1.620 1.870 19.8 Figure 1B REFER TO THE FOLLOWING INFORMATION AND USE FIGURE 1B TO ANSWER QUESTION 1-12. ASSUME THE TEMPERTURE TO BE 25º C AND YOU HAVE TWO NEW COPPER CONDUCTORS TO RUN. RUN NO. 1 IS TO BE 2500 FEET LONG USING NO. 12 WIRE. RUN NO. 2 IS TO BE 6000 FEET LONG USING NO. 7 WIRE. 1-12.   What is the approximate total resistance of (a) Run No. 1 and (b) Run No. 2? 1.    9.72 ohms  (b) 1.27 ohms 2.    4.68 ohms  (b) 3.52 ohms 3.    4.05 ohms  (b) 3.05 ohms 4.    1.12 ohms  (b) 4.98 ohms 1-13.   When a wire gauge is used to determine the size of a wire, the measurement should be made in what part of the gauge? 1.    In the slot 2.    In the semicircular opening 3.    Either 1 or 2 above, depending on wire size THIS SPACE LEFT BLANK INTENTIONALLY.