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Chapter 2.3 - Steam System

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Question bank for Energy Managers & Energy Auditors Chapter 2.3: Steam System Part I: Objective type Questions and Answers 1. For industrial process heating, the best quality of steam is: a) dry saturated steam c) wet steam 2. b) superheated steam d) high pressure steam What type of steam is generally used for power generation/application. a) high pressure steam with super heat c) dry saturated steam with high pressure 3. b) dry saturated low pressure steam d) wet steam with very high pressure In indirect steam heating, .heat is utilised for heating application. a) Sensible 4. b) Latent b) 30-40 m/sec c) 20-25 m/sec d) 15-20 m/sec The normal velocities encountered in pipes for saturated steam is a) 60 to 80 m/sec 6. d) none of the above The normal velocities encountered in pipes for superheated steam is a) 50-70 m/sec 5. c) Specific heat b) 10-30 m/sec c) 5 to 10 m/sec d) 30 to 40 m/sec Which among the following steam traps has the principle of operation Difference in temperature between steam and condensate a) thermodynamic trap b) thermostatic trap c) orifice type trap d) float trap 7. In industrial applications the type of trap used for main steam lines are a) thermodynamic 8. b) thermostatic c) bimetallic Velocity of steam in steam pipe is directly proportional to a) number of bends in pipe b) specific volume of steam c) length of pipe 9. d) none of the above Steam is not desirable among the choice given below from process heating application point of view for drying application will be less if we heat with a) saturated steam b) dry steam c) superheated steam 10. d) high pressure steam Which type of insulation is more economic or energy efficient for steam pipelines carrying saturated steam? a) glass wool 11. b) ceramic fibre c) calcium silicate d) fibre bricks For flash steam calculation, flash steam quantity available depends upon ___ a) condensate pressure and flash steam pressure b) pressure of steam generated in boiler c) Steam enthalpy at atmospheric pressure d) 12. d) float Total heat of flash steam Superheat is the addition of heat to dry saturated steam without increase in pressure. State True or False 2.3 Steam system - revised (table format). 18

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