This quiz works best with JavaScript enabled. Home > Agriculture > Water > Management > Water Technology – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Water Technology Quiz 1 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Coagulants help in the settling of A) Suspended impurities only. B) Fine suspended matter only. C) Colloidal particles only. D) Both (B) and (C). Show Answer Correct Answer: D) Both (B) and (C). 2. A loose collection of suspended solids in the inner surface of the boiler is called A) Scale and sludge. B) Sludge. C) Scale. D) None of these. Show Answer Correct Answer: B) Sludge. 3. How can scales in boiler be removed A) Electric shock. B) Iron scraper. C) Mechanical stress. D) Thermal shock. Show Answer Correct Answer: D) Thermal shock. 4. Which of the following ion get released from the cation exchange column? A) K+. B) H+. C) Na+. D) Ca+2. Show Answer Correct Answer: B) H+. 5. Dissolved carbon dioxide produces .....acid A) Sulphuric acid. B) Hydrochloride. C) Carbonic acid. D) None of above. Show Answer Correct Answer: C) Carbonic acid. 6. Boiler water having high alkalinity could develop ..... A) Oxygen pitting. B) Warping. C) Acidic corrosion. D) Caustic embrittlement. Show Answer Correct Answer: D) Caustic embrittlement. 7. In lime soda method the principle is ---- A) Convert soluble salt into insoluble precipitate. B) Substitute cations and anions of hardness producing salts. C) Replace cations by Na+. D) None of the above. Show Answer Correct Answer: A) Convert soluble salt into insoluble precipitate. 8. In COD which titre value is higher A) Back titre value. B) Blank titre value. C) FAS titre value. D) None of above. Show Answer Correct Answer: B) Blank titre value. 9. The total ..... are removed completely in the ion exchange pproces A) Dissolved other impurities. B) Dissolved solvents. C) Dissolved solids. D) Dissolved gases. Show Answer Correct Answer: C) Dissolved solids. 10. Priming is dangerous and can lead to ..... hammer A) Gas. B) Steam. C) Water. D) Air. Show Answer Correct Answer: C) Water. 11. Deposits of calcium and magnesium carbonates on the boiler heating surface cause ..... A) Scale. B) Carryover. C) Oxygen pitting. D) Caustic embrittlement. Show Answer Correct Answer: A) Scale. 12. Hardness in water is caused by the presence of: A) Potassium nitrate. B) Sodium carbonate. C) Sodium chloride. D) Calcium chloride. Show Answer Correct Answer: D) Calcium chloride. 13. In ion-exchange process, the capital cost is ..... and the operational expenses are ..... A) Low, low. B) Low, high. C) High, high. D) High, low. Show Answer Correct Answer: C) High, high. 14. Scale buildup on the water side of a steam boiler is caused by ..... A) An impure water supply. B) Scale in raw water. C) Improper boiler water treatment. D) None of the above. Show Answer Correct Answer: C) Improper boiler water treatment. 15. The water coming out from cation exchange resin will be A) Basic. B) Neutral. C) Acidic. D) None of above. Show Answer Correct Answer: C) Acidic. 16. Which of these do not cause scaling of the membranes? A) Organic and inorganic colloids. B) Calcium sulphate. C) Silica. D) Calcium carbonate. Show Answer Correct Answer: A) Organic and inorganic colloids. 17. Hard water is unfit for use in boilers for "steam raising" because A) Its boiling point is higher. B) Steam generated at a high pressure. C) It leads to scale formation inside the boiler. D) Water undergoes decomposition in to oxygen and hydrogen. Show Answer Correct Answer: C) It leads to scale formation inside the boiler. 18. Removal of dissolved oxygen we need to add A) Oxidising agent. B) Reducing agent. C) Both of these. D) None of above. Show Answer Correct Answer: B) Reducing agent. 19. In RO, pressure that is greater than the naturally occurring osmotic pressure is applied in order to ..... A) Mineralize water. B) Push bacteria across membrane. C) Desalinate water. D) Decompose water. Show Answer Correct Answer: C) Desalinate water. 20. Blow-down operation causes the removal of A) SCALES. B) SLUDGES. C) BOTH OF THESE. D) HOT WATER ONLY. Show Answer Correct Answer: A) SCALES. 21. The exhausted cation exchange column is regenerated by passing a solution of ..... A) Dil. HCl. B) Conc. NaCl. C) Conc. HCl. D) Dil. NaCl. Show Answer Correct Answer: A) Dil. HCl. 22. The amount of pressure to be applied in RO system is depends on ..... A) Organic content. B) Bacteria. C) Salt concentration. D) Membrane strenghth. Show Answer Correct Answer: C) Salt concentration. 23. When the impure water is passed through cation exchange resin, cation of impure water gets exchanged with A) OH- of Cation. B) OH- of anion. C) H+ of cation. D) H+ of anion. Show Answer Correct Answer: C) H+ of cation. 24. Ion exchange process is also called as ..... A) Permutit's process. B) Demineralization. C) Zeolite process. D) ) Lime soda process. Show Answer Correct Answer: B) Demineralization. 25. Which reagent is added in COD to combine with the chloride ions A) Magnesium sulphate. B) Mercuric sulphate. C) Lead sulphate. D) None of above. Show Answer Correct Answer: B) Mercuric sulphate. 26. In regeneration of cation exchange resin ----is used A) NaCl, Na2SO4 etc. B) HCl, H2SO4 etc. C) Alcohols. D) NaOH, KOH etc. Show Answer Correct Answer: B) HCl, H2SO4 etc. 27. Permanent hardness in water is caused by the presence of: A) Calcium bicarbonate. B) Magnesium sulfate. C) Both of them. D) None of them. Show Answer Correct Answer: B) Magnesium sulfate. 28. Resins after exhaustion can be regenerated by the addition of A) Water. B) Cations. C) HCl and NaOH solutions. D) Anions. Show Answer Correct Answer: C) HCl and NaOH solutions. 29. Boiler water is treated to prevent..... A) Scale. B) Oxygen pitting. C) Caustic embrittlement. D) All of the above. Show Answer Correct Answer: D) All of the above. 30. Hardness is a measure of scale forming ..... dissolved in water A) Minerals. B) Pollutants. C) Gases. D) None of the above. Show Answer Correct Answer: A) Minerals. Next →Related QuizzesWater QuizzesAgriculture QuizzesWater Technology Quiz 2 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books