Label the diagram below.
Write the correct letter, A-G, next to questions 21-25 below.
21. Waste container
22. Slurry
23. Water inlet
24. Gas
25. Overflow tank
Complete the flow chart below.
Choose FIVE answers from the box and write the correct letter, A-G, next to questions 26-30.
26.
27.
28.
29.
30.