11. The equivalent evaporation (kg/hr) of a boiler producing 2000 kg/hr of steam with enthalpy content of 2426 kJ/kg from feed water at temperature 40°C (liquid enthalpy =168 kJ/kg) is (enthalpy of vaporization of water at 100°C = 2258 kJ/kg)

1. 1. 2000
      

   
   
   

   2. 2149
      

   
   
   

   3. 186
      

   
   
   

   4. 1649

   
   
   

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1. View Hint View Answer Discuss in Forum

   Equivalent evaporation =		h1 - hfeed		× rh
   		hfgam

   
   

   Equivalent evaporation =	(2000)(2426 - 168)	= 2000 kg/hr
   	2258

   Correct Option: A

   Equivalent evaporation =		h1 - hfeed		× rh
   		hfgam

   
   

   Equivalent evaporation =	(2000)(2426 - 168)	= 2000 kg/hr
   	2258

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12. Which among the following is the boiler mounting?

1. 1. Blow off cock
      

   
   
   

   2. Feed pump
      

   
   
   

   3. Economizer
      

   
   
   

   4. Super heater

   
   
   

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1. View Hint View Answer Discuss in Forum

   Blow-off cock

   Correct Option: A

   Blow-off cock

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13. When initially dry and saturated steam flows through a nozzle, the ratio of actual discharge to calculated discharge is
    

1. 1. Equal to 1.0
      

   
   
   

   2. Greater than 1.0
      

   
   
   

   3. Less than 1.0
      

   
   
   

   4. Independent of inlet conditions

   
   
   

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1. View Hint View Answer Discuss in Forum

   Greater than 1.0
   

   Correct Option: B

   Greater than 1.0
   

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14. In a Rankine cycle heat is added
    

1. 1. Reversibly at constant volume
      

   
   
   

   2. Reversibly at constant temperature
      

   
   
   

   3. Reversibly at constant pressure and temperature
      

   
   
   

   4. Reversibly at constant pressure

   
   
   

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1. View Hint View Answer Discuss in Forum

   Reversibly at constant pressure

   Correct Option: D

   Reversibly at constant pressure

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15. In steam and other vapour cycle, the process of removing non-condensable is called
    

1. 1. Scavenging process
      

   
   
   

   2. Deaeration process
      

   
   
   

   3. Exhaust process
      

   
   
   

   4. Condensation process
      

   
   
   

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1. View Hint View Answer Discuss in Forum

   In steam and other vapour cycle, the process of removing non-condensable is called Deaeration process

   Correct Option: B

   In steam and other vapour cycle, the process of removing non-condensable is called Deaeration process

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