L&T EduTech | JSW | Boiler Combustion and Maintenance | Apr’ 26 | Participant Feedback – Fill out form JSW_Boiler Combustion_ILT_Post Assessment JSW_Boiler Combustion_ILT_Post Assessment The number of attempts remaining is 2 1 / 20 1. What is Purpose of Excess air…….. (Select most relevant answer) a. Not At all required in practical condition b. To create turbulence c. To dilute average temp of Flue gas d. To ensure complete combustion 2 / 20 2. Radiation Heat transfer is directly proportion to temperature difference (Supplying & Receiving Surface) in the power of …………… a. T^5.67 b. T^1.25 c. T^4 d. T^1 3 / 20 3. Methane's combustion can be represented as follows: CH4 +2O2 = CO2 + 2H2O , 32 kg of CH4 Required How much kg O2 Stoichiometrically after combustion. (Note : Molecular Weight of reaction component Already Provided above can be use) a. 88 b. 44 c. 128 d. 64 4 / 20 4. Which of the following fuel utilized Burner for combustion? a. Liquid Fuel b. Pulverized Coal c. All of the above d. Gaseous Fuel 5 / 20 5. In an ideal gas mixture, all the gases are ideal gases and they obey this equation of state given by a. pVM=RT b. pM=VRT c. pV = MRT d. pV=RTt 6 / 20 6. Clinker Formation is Dependent on which of the following property a. Flash Point b. Ash Fusion Temperature c. Ash Diffusion Temp d. Hardgrove Index 7 / 20 7. Which Fuel Contain Highest Moisture (%) a. Anthracite b. Bituminous c. Subbituminous d. Lignite 8 / 20 8. Which Chemical reaction result in to highest release of Heat out of Following : a. S + O2 = SO2……… ……….. Per kg of Sulphur b. 2C +O2= 2CO……… ……….. Per kg of Carbon c. H2+ (1/2) O2 = H2O……… ……….. Per kg of Hydrogen d. C+ O2 = CO2 ……… ……….. Per kg of Carbon 9 / 20 9. It is generally observed that, higher the molecular weight higher the Specific heat ,Then which of the following gases have Lowest Specific Heat…. Molecular Weight is as listed Below , H2= 2 kg/Kmole , S = 32 kg/Kmole , O= 16 kg/Kmole , C = 12 kg/Mole a. H2 b. SO2 c. H2O d. CO2 10 / 20 10. Higher the Combustion efficiency, Lower will be the Overall Heat rate keeping other parameter constant. a. True b. False 11 / 20 11. Methane's combustion can be represented as follows: CH4 +2O2 = CO2 + 2H2O , 23 kg of CH4 generate How much kg CO2 Stoichiometrically after combustion. (Rounded off) a. 63 b. 64 c. 92 d. 44 12 / 20 12. On heating of pulverized coal sample in presence of air, Which entrapped thing inside the coal losses at 100-120 Deg Cel…………. a. Moisture b. Methane c. Ethane d. Methane & Ethane 13 / 20 13. Which gas not generate out of combustion ? a. SiO2 b. NO2 c. CO2 d. SO2 14 / 20 14. Which Type of Coal is having Highest Gross Calorific Value? a. Brown coal b. Subbituminous c. Bituminous d. Lignite 15 / 20 15. To Control Sox Level ,Which APCD (Air Pollution Control Device) is required to install. a. Catalystic Convertor b. MFT c. FGD d. CFD 16 / 20 16. Higher the mesh size lower the size of particle that can pass through it ? a. False b. True 17 / 20 17. What is 3T (TTT) , which is very important in Combustion context a. Time , Temperature & Turbulence b. Time , Temperature &Titration c. Time , Temperature & Trash d. Temperature , Turbulence & Temperature 18 / 20 18. Heat Transferred in Boiler , Inside combustor is utilize through which of the following mode of heat transfer? a. Conduction Mode b. Convection Mode c. Radiation Mode d. All of the above 19 / 20 19. Lignite Contain _____ to _____ % Fixed Carbon a. 60-72% b. 30-40% c. 95-98% d. 90%-95% 20 / 20 20. The most commonly used combustion system (Fuel Firing) in India for the thermal power plant boiler is the _______________ Combustion system. a. Pulverized fuel b. Fluidized bed c. Travelling grate stoker firing d. Circulating fluidized bed Your score is
