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356 RICHARDSON'S BLUEBOOK OF PROJECTION
94. What is the negative head?
95. How must the negative head be adjusted?
96. Describe the negative head current carrying contact.
97. How should the negative carbon bear upon the groove or grooves ?
98. Must care be taken to position the negative carbon properly ?
99. What is important in regard to the negative head ?
100. What other items must be watched in the high intensity arcs?
101. What is the effect of burning the high intensity carbon below or above its rated capacity?
Speed of Carbon Consumption, page 384
102. What is the burning rate of the 9 and the 13.6 mm high intensity trim?
103. Why should you know the exact consumption speed of the carbons you employ, regardless of what type lamp you are using ?
104. How can you calculate carbon consumption speed?
105. Is an ammeter a necessity?
106. What are the harmful results of inadequate lamphouse ventilation ?
107. How much lamphouse ventilation should be maintained?
108. Why should the dowser be closed when striking the arc?
109. What should be done after running each reel?
Reflector Type High Intensity Lamps, page 385
110. Are the straight high intensity arc and reflector type high intensity the same?
111. What is the amperage range for the reflector high intensity arc?
Low Intensity Light Source, page 086
112. Does the reflector type low intensity arc supply substantial light values?
113. Why is this true?
114. Does the total light production power vary and for what reasons ?