A. More explosive and inflammable
B. Less poisonous
C. Lighter
D. All A., B. and C.
Correct Answer: D. All A., B. and C. ✔
Last Updated: March 08, 2019
Related MCQs
- Which of the following reactions occuring during coal gasification is called the Neumann reversal reaction ?
- Calorific value of gobar gas (containing CH4 = 60% , H2 = 10% ; CO2 = 30%) may be about __________ Kcal/Nm3?
- Calorific value as determined by bomb calorimeter is the__________?
- Which adsorbent is used for removing sulphur compounds (S Q, H2S, RSH etc.) removal from coke oven gas in by-products recovery plant ?
- Which of the following fuels has the highest calorific value per unit mass (kcal/kg) ?
- Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker?
- The calorific value of natural gas is about __________ kcal/Nm3?
- High amount of sulphur and phosphorous in coke causes __________ ?
- A coal containing high amount of volatile matter will have__________?
- Coke oven gas is a better fuel than blast furnace gas, because of its higher__________?
- Which of the following is not a micro component present in coal ?
- Which of the following would require maximum amount of % excess air for complete combustion ?
- Coking time in a commercial high temperature coal carbonisation plant is about __________ hours?
- With increase in C/H ratio of a fuel, the dew point of flue gases__________?
- High temperature carbonisation of coal takes place at __________ °C?
- When the coal is heated in absence of air, it is called its __________?
- Out of the following fuels, the difference between gross and net calorific value will be minimum in case of__________?
- A good quality coal should have __________?
- Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around __________ percent?
- Which of the following is a measure of the agglutinating (i.e., binding) property of coal ?
- By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of__________?
- Low temperature oxidation of coal is accelerated by the__________?
- As the C/H ratio of the fuel increases, the amount of CO2 formed on combustion __________ for the same percentage of excess air?
- Preheating of __________ the flame temperature?
- With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases?
- 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__________?