Power Plant Guruji

 Boiler Operation Engineer Interview Question - 7 What is cold end corrosion in boiler and When it occurs? Ans.  During Cold Start up, flue gas temperature may go below acid dew point as a result sulphur- di- oxide react with moisture content in flue gas and leads to formations of Sulphuric Acid.  When acid comes in contact with tubes it leads to acid attack of tubes.This is meant by cold End Corrosion. To avoid this, during cold start up lignite with low sulphur content be used. Read More BOE Interview Questions   What are the factors which affect the Natural circulation ? What is the difference between Tower type and Two pass conventional boiler? What parameters are measured during Boiler PG test ? Why the start up vent is used in Boilers? List out the potential reasons for boiler tubes failure ?  Also Read : Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -1 Boiler Operation Engineer ( BOE ) Previous Year Multipl...

  Boiler Operation Engineer (BOE Exam) Interview Question - 6 What are the factors which affect the Natural circulation ? Ans.  Height of the downcomer and Water wall tubes Density difference of water and steam If circulation number increases: Chance of scale formation is less Occurrence of DNB will be less Boiler size become increases Efficiency become lower No chance of overheating tubes If circulation number decreases: Chance of scale  formation  is more Occurrence of DNB will be high Boiler size become small Efficiency will be higher Chance of overheating tubes  Also Read : Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -1 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -2 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -3 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -5 Boiler Operation En...

What is difference between Tower type and Two  pass conventional boiler? Ans.  Tower Type 1.All the boiler pressure parts are arranged single column 2. Height of the boiler is more 3. Drum is at 80 m level 4.The pressure parts are arranged in horizontal manner Two pass 1.The boiler pressure parts arranged in two columns 2.Height of the boiler is less 3.Drum is at 50 m level 4.The pressure parts are arranged in both vertical and in horizontal manner Also Read : Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -1 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set - 2 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -3 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -4 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -5 Boiler Operation Engineer ( BOE ) Previous Year Multiple Cho...

What parameters are measured during Boiler PG test ? Ans. Following parameters are measured during Boiler performance guarantees test Steam pressure & temperature Steam flow &feed water flow Fuel consumption Attemperator / De superheater water flow Feed water parameters like pH, conductivity, silica, Hydrazine Boiler Water parameters like pH, conductivity, silica, Phosphate Steam parameters like pH, conductivity, silica etc Feed water temperature at Deaerator outlet Feed water temperature at Economiser inlet Exhaust flue gas temperature Excess air & 02% in flue gas Flue gas parameters like SPM, sOx, NOx etc ESP&APH inlet & outlet flue gas temperature for air leakage test Combustion air temperature after APH Unburnt level in ash CBD water flow Drum level Boiler auxiliary power consumption Operating % of load Fans & fuel feeding system at various Boiler load. Also Read : Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -1 B...

 What is the meaning of commissioning ?  Ans.  The term “ COMMISSIONING ” is used to describe the activity involved during the latter stage of erection upto the completion of the 72 hours trial run on full load which leads commercial operation. The commissioning phase is a period of intense activity where many previously unrelated activities start to merge or interact with one another forming a complex sequence of events.   It is essential to ensure that the plant has been thoroughly tested prior to the normal operation so that initial performance can established defects and omissions clear.  Purpose of commissioning  Target dates should be achieved. To check that the plant is supplied and erected as per design. Quality of erection and commissioning should be maintained. To check that the plant operates reliably, safety and meets the design performance.  To established the reasons for any failure to achieve the design performance or any other l...

 NCP Boiler Operation Engineer ( BOE) Interview Question - 2 Question :- Why the start up vent is used in Boilers? Ans.  Start up vent is used for To provide minimum steam flow from the boiler during start up, shutdown & sudden load cut off It is used to manual relieve of excess pressure Used to give excess flow for temperature rising during start up or partial loads Used to take excess load on boilers during peak load test Also Read : Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -1 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -2 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -3 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -4  Most Important Post : How to calculate suction head in centrifugal pump Water Chemistry Interview Question With Answer  Boiler Feed Pump Interview Question Wit...