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Instrument Mechanic Practice Test: pH Measurement
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Instrument Mechanic Practice Test: pH Measurement
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25 Questions

1. Which of the following is not the characteristic of chopper amplifier pH meter?
2. Which of the following is the relation between the concentration of hydrogen and hydroxyl ions in an acidic solution?
3. Which of the following is the simplest of pH meters?
4. Which of the following is the value of hydroxyl ion concentration of pure water?
5. pH meters can be considered as voltage sources with which of the following internal resistances?
6. A chromatograph separates and distinguishes different molecule types in a fluid stream by:
7. Which of the following is not the characteristic of null-detector type pH meter?
8. the electrode used in pH measurement have which of the following internal resistance?
9. The Nernst equation is given by which of the following statements?
10. Flue gas oxygen measurement (“O2 trim”) is important in combustion control systems for the purpose of:
11. Which of the following is not the characteristics of direct reading type pH meters?
12. Which of the following is the relation between hydrogen and hydroxyl ion concentration of pure water?
13. A pH value less than 7.0 means that the solution is:
14. Which of the following is not the characteristic of direct reading type pH meters?
15. Which of the following is the relation between the concentration of hydrogen and hydroxyl ions in a basic solution?
16. In which of the following ways can the disadvantages of chopper amplifier type pH meter be overcome?
17. An aqueous solution has a hydrogen ion concentration of 0.0015 M. Calculate the pH of this solution.
18. The electrodes used in pH measurement have which of the following internal resistances?
19. An electrode less or toroidal conductivity probe enjoys the following advantage over electrode-type conductivity probes:
20. Which of the following can be used to provide automatic temperature compensation?
21. Which of following is not the characteristics of null detector type pH meter?
22. Which of the following is the value of hydrogen ion concentration of pure water?
23. pH meters can be considered as voltage sources with which of the following internal resistance?
24. Which of the following is the formula for pH calculation?
25. Which of the following is not a failure in pH meters?

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