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. Clinker Formation is Dependent on which of the following property a. Ash Fusion Temperature b. Ash Diffusion Temp c. Flash Point d. Hardgrove Index 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. 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. Methane & Ethane d. Ethane 4 / 20 4. In an ideal gas mixture, all the gases are ideal gases and they obey this equation of state given by a. pVM=RT b. pV = MRT c. pV=RTt d. pM=VRT 5 / 20 5. What is Purpose of Excess air…….. (Select most relevant answer) a. To create turbulence b. To dilute average temp of Flue gas c. To ensure complete combustion d. Not At all required in practical condition 6 / 20 6. Which Fuel Contain Highest Moisture (%) a. Bituminous b. Subbituminous c. Lignite d. Anthracite 7 / 20 7. Which Chemical reaction result in to highest release of Heat out of Following : a. S + O2 = SO2……… ……….. Per kg of Sulphur b. H2+ (1/2) O2 = H2O……… ……….. Per kg of Hydrogen c. 2C +O2= 2CO……… ……….. Per kg of Carbon d. C+ O2 = CO2 ……… ……….. Per kg of Carbon 8 / 20 8. To Control Sox Level ,Which APCD (Air Pollution Control Device) is required to install. a. MFT b. FGD c. CFD d. Catalystic Convertor 9 / 20 9. Lignite Contain _____ to _____ % Fixed Carbon a. 90%-95% b. 30-40% c. 95-98% d. 60-72% 10 / 20 10. What is 3T (TTT) , which is very important in Combustion context a. Time , Temperature & Trash b. Temperature , Turbulence & Temperature c. Time , Temperature &Titration d. Time , Temperature & Turbulence 11 / 20 11. Higher the mesh size lower the size of particle that can pass through it ? a. False b. True 12 / 20 12. The most commonly used combustion system (Fuel Firing) in India for the thermal power plant boiler is the _______________ Combustion system. a. Travelling grate stoker firing b. Fluidized bed c. Pulverized fuel d. Circulating fluidized bed 13 / 20 13. Which Type of Coal is having Highest Gross Calorific Value? a. Bituminous b. Brown coal c. Lignite d. Subbituminous 14 / 20 14. Which of the following fuel utilized Burner for combustion? a. Gaseous Fuel b. Liquid Fuel c. All of the above d. Pulverized Coal 15 / 20 15. 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. 64 b. 63 c. 92 d. 44 16 / 20 16. Heat Transferred in Boiler , Inside combustor is utilize through which of the following mode of heat transfer? a. Conduction Mode b. All of the above c. Radiation Mode d. Convection Mode 17 / 20 17. 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. 128 c. 44 d. 64 18 / 20 18. 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. H2O b. SO2 c. CO2 d. H2 19 / 20 19. Higher the Combustion efficiency, Lower will be the Overall Heat rate keeping other parameter constant. a. False b. True 20 / 20 20. Which gas not generate out of combustion ? a. NO2 b. SiO2 c. CO2 d. SO2 Your score is
