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Chapter 3.7 - Cooling Tower

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Question bank for Energy Managers & Energy Auditors Chapter 3.7: Cooling Towers Part-I: Objective type questions and answers 1. The type of cooling towers with maximum heat transfer between air to water is ___. a) Natural draft 2. b) Mechanical draft c) Both a & b d) Neither a nor b Natural draft cooling towers are mainly used in ____. a) Steel industry b) alumina industry c) fertilizer industry d) power stations 3. In counter flow induced draft cooling towers water and air both enter the top and exist at the top of the cooling tower. State whether True or False? 4. The range of the cooling tower is determined by the connected heat load True or False? 5. Match the following cooling tower parameters a) Range i) Close to wet bulb temperature b) Approach ii) Related to ambient conditions c) Out let water temperature iii) Higher temperature difference Ans. 6. a-iii) b-i) c-ii) Better indicator for cooling tower performance is ____. a) Wet bulb temperature 7. b) Dry bulb temperature c)Range Cooling tower effectiveness is the ratio of --------a) Range/(range + approach) b) Approach/(range + approach) c) Range/Approach 8. d) Approach d) Approach/Range Cooling tower reduces circulation water temperature close to ---------a) Dry bulb temperature ambient wet bulb temperature (WBT) c) Dew point temperature 9. b) d) None of the above The ratio of dissolved solids in circulating water to the dissolved solids in make up water is termed as ____. a) Liquid gas ratio c) cooling tower effectiveness 10. b) cycles of concentration d) None of the above Which one of the following has maximum effect on cooling tower performance: a) Fill media 11. b) Drift c) Louvers d) Casing Which one of the following is true to estimate the range of cooling tower? a) Range = Cooling water inlet temperature Wet bulb temperature b) Range = Cooling water outlet temperature Wet bulb temperature c) Range = Heat load in kcal / h Water circulation in lph d) None of the above 12. A cooling tower is said to be performing well when: 3.7 Cooling towers - revised (table format) 52

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