This quiz works best with JavaScript enabled. Home > Water > Management > Water Technology – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Water Technology Quiz 1 (20 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) Mechanical stress. B) Iron scraper. C) Thermal shock. D) Electric shock. Show Answer Correct Answer: C) Thermal shock. 4. Which of the following ion get released from the cation exchange column? A) Ca+2. B) K+. C) Na+. D) H+. Show Answer Correct Answer: D) 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) Acidic corrosion. B) Oxygen pitting. C) Caustic embrittlement. D) Warping. Show Answer Correct Answer: C) 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 gases. C) Dissolved solvents. D) Dissolved solids. Show Answer Correct Answer: D) Dissolved solids. 10. Priming is dangerous and can lead to ..... hammer A) Steam. B) Water. C) Gas. D) Air. Show Answer Correct Answer: B) Water. 11. Deposits of calcium and magnesium carbonates on the boiler heating surface cause ..... A) Scale. B) Oxygen pitting. C) Caustic embrittlement. D) Carryover. Show Answer Correct Answer: A) Scale. 12. Hardness in water is caused by the presence of: A) Sodium chloride. B) Sodium carbonate. C) Calcium chloride. D) Potassium nitrate. Show Answer Correct Answer: C) Calcium chloride. 13. In ion-exchange process, the capital cost is ..... and the operational expenses are ..... A) High, low. B) High, high. C) Low, low. D) Low, high. Show Answer Correct Answer: B) 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) Desalinate water. C) Decompose water. D) Push bacteria across membrane. Show Answer Correct Answer: B) 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. Next →Related QuizzesWater QuizzesWater Technology Quiz 2Water Technology Quiz 3 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books