A. 71%
C. In between 37 & 71%
D. None of these
Correct Answer: 71% ✔
Last Updated: March 08, 2019
Related MCQs
- Quantity of coke produced from metallurgical coal may be around __________ percent?
- The liquid used for the washing of coal in an industrial coal washery is a mixture of water and __________?
- Which of the following constituents of coal is the most important in the production of coke ?
- The combustion reaction, C + O2 = CO2, is __________?
- Orsat apparatus is meant for __________?
- Yield of coke oven gas in low temperature carbonisation of coal is about __________ Nm3 /ton of dry coal?
- Blast furnace gas burns with a bluish flame, because of the presence of__________?
- Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about__________?
- Fuel gases containing hydrocarbons (e.g. coke oven gas) are not preheated before burning, mainly because __________?
- Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter?
- Calorific value of bituminous coal may be around __________ Kcal/kg?
- Stack heat losses can be minimised by__________?
- Method of maintaining fires in furnace during standby periods without undue consumption of fuel is called__________?
- Anthracite coal __________?
- By-products are __________ recovered in ‘Beehive ovens’ ?
- A coal containing very high percentage of durain is called __________ coal?
- The function of secondary combustion air is to __________?
- Temperature of coke oven gas just before entering into saturator (for recovery of NH3) is about __________ °C?
- Producer gas containing least amount of tar is produced by the__________?
- Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases?
- Which of the following is used for making the explosive „TNT‟ ?
- Safe condition for storage of high V.M. bituminous coal is that __________?
- Flue gas from the heating chamber of by product coke ovens is removed by__________?
- Mineral matter, ‘M’ and ash percentage ‘A’ in coal are roughly related as__________?
- Calorific value of dry wood may be around __________ Kcal/kg?
- Combustion of pulverised coal as compared to that of lump coal __________?
- During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass?
- Coal tar fuel – 200 (CTF 200) is a mixture of __________?
- Sometimes water is sprayed during coal charging in the coke oven, which helps in __________?
- The sequence of absorption in flue gas analysis by Orsat’s apparatus is respectively__________?
- Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its__________?
- Critical Air Blast (CAB) value of coke is a direct measure of its__________?
- A particular coal is said to be free burning when it __________?
- Ultimate analysis of coal determines its __________ content?
- Higher efficiency in the combustion of solid fuel cannot be achieved by__________?
- If oxygen content in the flue gas rises too high, fuel is being wasted by __________?
- During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the__________?
- __________ process is meant for direct hydrogenation of coal to produce liquid fuel?
- One kg of carbon for theoretically complete combustion requires __________ kg of air?
- When incomplete combustion loss is high, the flue gas analysis shows large amount of __________?
- Naphthalene recovered from coke oven gas is used__________?
- Grindability index of a coal is 100. It implies that the __________?
- In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the__________?
- Which of the following is not a manufactured fuel ?
- Prime coking coal is always blended with medium or non- coking coal before carbonisation__________?
- Low temperature carbonisation of coal takes place at __________ °C?
- With increase in calorific value of fuels, their adiabatic flame temperatures__________?
- Which of the following is not applicable to fluidised bed combustion of coal ?
- Efficiency of the combustion of a fuel is judged by the __________ the flue gas?
- Preheating of a gaseous fuel results in increased__________?
- Mineral matter content (M) and ash content A. in coal are approximately related as __________?