Grade 



Date 



(48) 



EXERCISE 28. 



Object. — To adjust height of bowl and position of cream screw. 



Apparatus. — Separators in separator room; quantity of whole milk. 



Step 1. Name of separator. 



Step 2. See that height of bowl is such as to deliver skimmilk and cream 

 into their respective covers without touching them. Before making any 

 adjustment, study direction sheet for this machine thoroughly. 



Step 3. With sufficient milk (or water) in supply can to maintain full flow, 

 separate at least one gallon, shut off supply, weigh and compute what 

 proportion the cream is of the total amount separated. 



Step 4. Adjust cream screw to make the amount of cream between 12 and 14 

 per cent of the total separated. 



Step 5. If already correct, adjust so as to make a change of between 4 and 6 

 per cent. 



Report. 



Explain below — 



1. How much change was made in the cream screw? 



2. How does the cream screw affect the amount of cream? 



3. How does it affect the amount of fat? 



4. When water is separated, would the amount of water leaving the 

 cream spout be the same as the amount of cream when milk is separated? 



5. Give reason for your answer. 



