What is the free air conductor to use inside a building that can carry 70A in a city where aluminum conductors are prohibited inside buildings Select one: A. #4 Copper B. #10 Copper C. #6 Copper D. #8 Copper E. #1/0 Copper

In general, the letter-type designation R formerly referred to a thermoset insulation. a. rhodium b. rubidium C. d. rayon rubber -based covering and now indicates

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Answer question 13 to 15 please.

3. An insulator is a material containing _____ valence electrons.   Select one: A. THREE OR FOUR B. FIVE OR SIX C. ONE OR TWO D. SEVEN OR EIGHT

Which of the following conductors have a high resistance?     Select one: a. Silicon b. Platinum c.  Gold d.   Air

3.Question (a) Look up the definition of unit for clothing insulation, called “clo” value. Convert 1.5 clo to a value with an unit in international standard. (b) In the winter, people wear more cloth to keep themselves warm. You have the option of wearing 2 jackets that are 0.3 cm thick or 1 jacket that is 0.6 cm. Assume they are made of the same material and neglect any effect from cloth openings. Which option should you choose to keep you warm? Draw a thermal circuit to help with your discussion.

3. A wire has a resistance of 0.75 ohm per ft. at an area of 0.00001 square meter. Determine the resistance of a 200ft long conductor if the area is 0.00003 square meter.

The amount of heat generated in a conductor or other electrical equipment is a matter of how much current flows and? A. The type of insulation b. For how far c. For how long d. The ocpd

Suppose you wish to fabricate a uniform wire out of 1g of copper. The resistance of wire is to be 0,5 ohms and if all the copper is used, what will be the diameter of the wire? Resistivity is 1.7 x 10e-8 ohm – meter and mass density is 8.92 x 10e3 kg / cubic meter.