Power Plant Guruji

 How do you calculate the unburned carbon in ash sample? Ans.  Take 1 gram of ash sample & burn it in muffle furnace for 1 hr at temperature 900 deg C. Then cool it in desiccator for 15 minutes. Then sample is again weighed for final weight. % of unburned carbon = Loss in weight X 100/ Weight of the sample (1 gram) 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 Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -6 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -7 BOE (Boiler Operation Engineer) Previous Year Exam Questions And Answers Set - 8 Related Post : How to calcul

Central BOE ( NCP) previous year question and answer  Question 1. Factor of safety is defined as ratio of A. Ultimate stress to allowable stress B. Ultimate stress to yield stress C. Allowable stress to ultimate stress D. Allowable stress to yield stress Ans. A Question 2. Variation of shear stress in a circular shaft subjected to torsion is A. Parabolic B. Linear C. Hyperbolic D. None of the above Ans. A Question 3. The minimum capacity of any closed vessel which generates steam under IBR is A. 227.5 litres B. 22.75 litres C. 22.75 kilolitres D. 2.275 litres Ans. B Question 4. A rise in conductivity of boiler feed water indicates A. Drop in contamination B. Greater purity of feed water C. Rise in contamination of feed water D. It has got relation with contamination of feed water Ans. C Question 5. Deaeration of boiler feed water is referred to as A. Removal of silica B. Removal of scales by blowdown C. Removal of dissolved gases D. All the above Ans. C Question 6. Percentage rise in b

 What is the difference between steaming type and Non steaming type Economiser? Non steaming type:  Sensible heat is alone added to the feed water in the Non steaming type with economiser to obtain only water its temperature is maintained well below the saturation temperature. Non boiling type economiser can be made of steel or cast iron depending on the sulfur content of the material. Cast Iron economiser Cast iron has the advantage of being resistant to acid corrosion and Ash abrasion, so in sulfur fuel boilers, cast iron economiser are used. Of course, cast iron has the disadvantage of poor bearing and beating. Therefore, to avoid the phenomenon of water hammer causing impact force in the tubes of the heater in the economiser must not boil, i.e. cast iron economiser are only fitted to those ovens that require a non-boiling type economiser. Steaming type:  Sensible heat and partial latent heat is added to the feed water in the steaming type economiser to obtain steam and water mixtur

 How do you calculate Volatile matter present in coal? Ans.  Take 2 gram of moisture free coal sample & keep it in mufle furnace for 7 minutes at 900 deg C temperature. Then cool it in desiccator for 15 minutes. Then sample is again weighed for final weight. Volatile matter Loss in weight X 100/Weight of the sample (2 gram) 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 Choice Questions With Answer Set -6 Boiler Operation Engineer ( BOE ) Previous Year Multiple Choice Questions With Answer Set -7 BOE (B

  Describe the indirect method of calculating the boiler efficiency Boiler Efficiency : Thermal efficiency of boiler is defined as the percentage of heat input that is effectively utilised to generate steam. There are two methods of assessing boiler efficiency. 1) The Direct Method: Where the energy gain of the working fluid (water and steam) is compared with the energy content of the boiler fuel. 2) The Indirect Method: Where the efficiency is the difference between the losses and the energy input. Boiler Efficiency by Indirect Method Indirect method is also called as heat loss method. The efficiency can be arrived at, by subtracting the heat loss fractions from 100. The standards do not include blow down loss in the efficiency determination process.  The principle losses that occur in a boiler are: i. Percentage heat loss due to dry flue gas ii. Percentage heat loss due to evaporation of water formed due to H2 in fuel iii. Percentage heat loss due to evaporation of moisture presen

 Why Hcl is more preferred than Sulphuric Acid for regeneration of cation exchanger ?  Ans.  Hydrochloric acid is more efficient than sulphuric acid to regenerate a strongly acidic cation exchange resin.  1. With 50 g HCl per litre of resin, a conversion of 60 % to the H+ form is achieved. With 50 g H2SO4, a conversion of only 40% is achieved. 2. Even expressed as equivalents, hydrochloric acid is more efficient: 36.5 g HCI (1 eq) will convert the resin to 45 %, whereas 49 g H2S04 (1 eq) convert only 39 %. 3. To obtain total conversion, i.e. 100 % in the H+ form, we need about 6.5 eq HCl (240 g/L) but 8 eq H2S04 (400 g/L). Most Important Post : How to calculate suction head in centrifugal pump Water Chemistry Interview Question With Answer  Boiler Feed Pump Interview Question With Answer  Top 16 Power System Interview Questions   Boiler Feed Pump (B.F.P) Starting Procedure In Thermal Power Plant Types of Mechanical Seals in Pump  Why pumps are used in parallel and series mode of operat