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