A. Bituminous coal
B. Coke
C. Semi-bituminous coal
D. Anthracite
Correct Answer: Coke ✔
Last Updated: March 08, 2019
Related MCQs
- Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal ?
- High sulphur content in a fuel __________ of the flue gases?
- Low temperature oxidation of stored coal results in the__________?
- High rate of heating of coke ovens__________?
- ombustion of pulverised coal compared to the lumpy coal __________?
- Supply of excess air for complete combustion of fuel is necessitated to facilitate__________?
- Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about __________°C?
- Coke oven gas burns with a yellowish flame, because of the presence of __________?
- With increase in moisture content of coal, its__________?
- In general, the limit of inflammability/explosion limit of fuel gases is widened by the__________?
- Traces of tar fog present in the coke oven gas is removed by__________?
- C/H ratio is the maximum in case of__________?
- The bright glow of a combustion process is the characteristic of __________ temperature oxidation of coal?
- Largest constituent of blast furnace gas is__________?
- A travelling grate stoker is meant for the efficient burning of __________ coal?
- Lurgi coal gasifier is a pressurised __________ bed reactor?
- The fuel ratio of a coal is__________?
- Presence of free moisture in coal is most disadvantageous during__________?
- Fuel for a nuclear reactor (thermal) is __________?
- The calorific value of ‘LPG’ (50% propane + 50% butane) is about __________ kcal/Nm3?
- With increase in the oxygen content of the coal, its __________ decreases?
- Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher __________?
- Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in__________?
- Catalyst used in Fischer-Tropsch process is__________?
- Dry air required to burn 1 kg of carbon completely may be around __________ kg?
- ‘Fat coals’ are those coals which have very high__________?
- With increase in C/H ratio of a fuel, the amount of CO2 formed on its complete combustion__________?
- Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the__________?
- Advantages of fluidised bed combustion are __________?
- The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to__________?
- Desirable “Micum Index” values of metallurgical coke are __________?
- Which of the following fuels is the best for burning on chain grate stoker ?
- “Overfire burning” in a furnace is a phenomenon characterised by the __________?
- A coal gasifier operating at 20 atm. (e.g. Lurgi gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having __________?
- For every 10% increase in the excess air; the fuel consumption increases by __________ percent?
- Main use of hard coke produced by high temperature carbonisation is in the __________ ?
- Percentage of carbon monoxide in blast furnace gas may be around __________ ?
- Which is the most matured coal ?
- Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its __________?
- Incomplete combustion of a fuel is characterised by the high __________ in the flue gas?
- Very __________ coals are completely devoid of cokability i.e., it is non-coking ?
- High excess air in combustion of fuels results in__________?
- “Micum Index” of a coke is a measure of its__________?
- __________ has the widest inflammability limit (explosion limit) of all the gases?
- A good metallurgical coke__________?
- The cuprous chloride used in orsat apparatus can absorb__________?
- A gaseous fuel in order to develop luminosity on burning, must contain __________?
- L.D. converter gas (produced in steel plant) comprises mainly of __________?
- Highly caking coals__________?
- The hottest part of the flame lies in its __________ zone?
- The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be__________?