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Within the boiler, the temperature of steam is highest in
1. Water drum
2. Water tubes
3. Water walls
4. Super heater

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Correct Answer - Option 4 : Super heater

Explanation:

Steam boiler:

  • The heat of combustion of coal in the boiler is utilized to convert water into steam at high temperature and pressure.
  • The flue gases from the boiler make their journey through super-heater, economiser, air pre-heater and are finally exhausted to atmosphere through the chimney.
  • The boiler system comprises of feed water system, steam system and fuel system.
  • The feed water system provides water to the boiler and regulates it automatically to meet the steam demand. Various valves provide access for maintenance and repair.
  • The steam system collects and controls the steam produced in the boiler. Steam is directed through a piping system to the point of use. Throughout the system, steam pressure is regulated using valves and checked with steam pressure gauges.
  • The fuel system includes all equipment used to provide fuel to generate the necessary heat.

Super heater:

  • A super-heater is a device used to convert saturated steam or wet steam into superheated steam or dry steam at constant pressure.
  • In a super heater the temperature of steam reaches to its highest value within the boiler.  

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