A. Origin of petroleum oil
B. Origin of coal
C. Coalification
D. Variation of coal quality with depth
Correct Answer: Origin of coal ✔
Last Updated: March 08, 2019
Related MCQs
- Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced?
- Fuel combustion is never cent per cent efficient due to__________?
- A coal with high __________ content, would ignite most easily?
- Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas ?
- High ash containing coke__________?
- Low temperature oxidation of coal resulting from bad storage conditions does not decrease its__________?
- Bright coal__________?
- A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the ‘carpet loss’. The carpet loss may be of the order of __________ cms?
- A fuel with high heat release rate will__________?
- The pyrogallol solution used in Orsat apparatus can absorb__________?
- In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less?
- Percentage of nitrogen in blast furnace gas may be around__________?
- During coking of coal, the ash content (percentage)__________?
- Stack (chimney) height in a big thermal power plant is dictated by the__________?
- The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called ?
- Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent?
- The calorific value is the highest out of the following for__________?
- A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon __________?
- Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier?
- Ionisation potential applied across the electrodes of electrostatic tar precipitator is around__________?
- Coal tar (produced by high temperature carbonisation) is the main source of__________?
- Hard coke is manufactured from__________?
- Which of the following is a primary fuel ?
- Coking time in narrow by-product coke ovens is around __________ hours?
- Too much of excess air in combustion results in high__________?
- Washing of coal is done to reduce the__________?
- Efficient burning of anthracite coal requires__________?
- Water gas constitutes mainly of __________?
- Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the__________?
- Benzene is used__________?
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- During the carbonisation of coal__________?
- A coal that softens and fuses on heating is__________?
- Main use of soft coke is as __________ fuel?
- Gas yield in the Kopper-Totzek coal gasifier is about __________ Nm3/ton coal (ash = 35%)?
- Height of coke oven is limited (say maximum upto 7 metres) mainly by the__________?
- Steam is intermittently admitted into the fuel bed during the production of producer gas to__________?
- Which of the following coke has the least percentage of ash ?
- The weathering index of a coal__________?
- Blast furnace gas is a very poisonous gas because of its predominantly high __________ content?
- Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen?
- Adiabatic flame temperature of a fuel is dependent on the initial temperature of__________?
- Main constituents of Benzol are __________?
- Gobar gas is produced by the __________ of cow dung?
- Hard pitch is used for making__________?
- Undercharging of coal in the by-product coke ovens results in __________?
- Benzol is used__________?
- Pulverised coal used in boiler firing need not have__________?