F. H. Richardson's bluebook of projection (1935)

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1935
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
00075
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
March 21, 2024
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ELECTRICAL CONDUCTORS 1. What properties are considered of basic importance in conductors ? 2. What two widely different purposes do conductors employed in projection work serve ? 3. Why was copper selected as standard for electrical conductors? Wire Capacities, page 62 4. What authority fixes the capacity limits of electrical conductors ? 5. What would happen were the specified capacity limits exceeded? 6. What standard wire gauge is used to measure wire diameters ? 7. May varnished cloth insulation be used on any diameter of wire? 8. May anything less than No. 14 wire be used for inside work ? -M-6 • 9. What kind of wires does table No. 3 cover? 10. For what purpose may table No. 4 be used? 11. Using table No/ J how would you calculate the resistance of a copper circuit? ,.<^qaa 12. Is resistance for any current flow up to the rated capacity of a wire practically the same? \i Mil Foot Standard, page 64 13. Upon what is the calculation of resistance based? 14. What is a "mil foot" of resistance? 15. What is the resistance of one mil foot of commercial copper at 75 degrees Fahrenheit? S^jsiu^.i^ J^/v~4<n*a . 16. How is resistance of a circuit calculated? 17. Quote the rule for calculating resistance of circuits. 18. Does age affect resistance of copper conductors that have not been subjected to overload? 57