A. Hydrogen
B. Methane
C. Unsaturated hydrocarbons
D. All A., B. and C.
Correct Answer: Hydrogen ✔
Last Updated: March 08, 2019
Related MCQs
- If CO2 is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as__________?
- Presence of force moisture in coal is most disadvantageous during its __________?
- High ash coals __________?
- Moisture loss is determined by the __________?
- Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis?
- Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces __________?
- Yield of blast furnace gas is about __________ Nm3 /ton of pig iron?
- Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of__________?
- Which of the following is a rich fuel gas ?
- With increases in carbonisation temperature__________?
- 64-132) rank coal (ASTM) means a coal with 64%__________?
- A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the__________?
- Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant ?
- Main constituent of natural gas is __________?
- Froth floatation is used for__________?
- Anthracite can be used for__________?
- Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent?
- Which of the following accounts for maximum energy loss in a boiler ?
- Naphthalene is used for making__________?
- Dry air requirement for burning 1 Nm3 of CO to CO2 may be around __________ Nm3 ?
- In flue gas analysis by Orsat’s apparatus, oxygen is absorbed by__________?
- Blast furnace coke is made from coal by__________?
- For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will__________?
- Low temperature carbonisation of coal produces__________?
- Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr?
- A coal having higher volatile matter content will necessarily have lower__________?
- Function of secondary air in pulverised coal firing is to__________?
- The advantage of firing pulverised coal in the furnace lies in the fact, that it__________?
- Calorific value of both the solid & liquid fuels can be determined by using __________ calorimeter?
- The most matured coal out of the following is__________?
- (64-132) rank coal (ASTM) means a coal with 64%__________?
- Ignition temperature decreases progressively from anthracite to lignite, because__________?
- For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3), while the C.V. is same on weight basis (i.e., kcal/kg) ?
- A good metallurgical coke should have very low__________?
- Washing of coal__________?
- Insitu theory and drift theory are related to the__________?
- 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 ?