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Assignment Questions - 14209_454
Assignment Questions - 14209_456

Photography (Basic) - Introduction to photography and other graphic techniques
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7-65. You have set up an impeller type of mixer to mix a developer solution, but you have adjusted the clamp improperly so the shaft is vertical and in the center of the container. What is the most probable end result? 1.    The motor bearings are damaged 2. Too much air was whipped into the solution 3.    The mixer vibrated enough to mix  the  chemicals  sufficiently 4.    The  solution  was  churned  from top to bottom,   rather than from bottom to top 7-66. How many degrees Celsius equate to 68°F? 1. 10°C 2. 20°C 3. 30°C 4. 40°C 7-67. You are mixing a developing solution and the directions call for water at 23.8°C. This is equal to how many degrees Fahrenheit? 1. 18.75°F 2. 37.50°F 3. 75.00°F 4. 125.50°F 7-68. You are preparing a working solution of developer from a stock solution. The  instructions  call for 1 part of stock solution and 3 parts water. You need a total of 1 gallon of working solution. What amount of water, in ounces, should you add to the solution? 1. 32 2. 64 3. 96 4. 128 7-69. For adequate ventilation in a chemical  mixing  area,  there  should be one complete air change every 1. 15  minutes 2. 30  minutes 3. 3  minutes 4. 45   minutes 7-70. It is permissible to mix photo- graphic  chemicals  in  a  photographic print  room  that  has  adequate ventilation. 1. True 2. False 7-71. You need 32 ounces of developer solution. The  only  size  package of  dry,  prepackaged  chemicals  you have on hand makes 128 ounces. Should you mix the entire package to make 128 ounces and, if so, why? 1. Yes; when only part of the package is mixed, some of the ingredients  may  be  left  out of  the  resulting  solution 2. Yes; when only part of the package  is  mixed,  the  resulting solution  will  not  develop  film 3. No;  dry,  packaged  chemicals  are homogenized 4. No;  dry,  packaged  chemicals  are formulated to be mixed either in part or in whole 7-72. You  should  follow  what  procedure when  mixing  chemicals? 1. Add  water  to  dry  chemicals and   acid to water 2. Add   dry chemicals to water and   acid to water 3. Add  water  to  dry  chemicals and  water to acid 4. Add   dry chemicals to water and  water to acid Learning  Objective: Recognize safety  precautions  required  in chemical mixing areas. 7-73. Labels  on  chemical  storage  tanks must include the name of the solution,  hazardous  chemicals contained,   the name of the person who mixed it, and what other information? 1. The  water-mixing  temperature 2. The date mixed 3. The  antidote 4. The  name  of  the  chemical-mixing supervisor 55







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