Pick the odd man out?
Carbon Content by weight in air dried wood may be about __________ percent?
Which of the following has the least calorific value (kcal/Nm3) ?
Turndown ratio of a gas burner is equal to the __________ ?
Which of the following gaseous fuels has the lowest calorific value ?
Ignition temperature of a fuel in air is __________ that in pure oxygen?
Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of __________?
Higher percentage of ash in coal meant for the production of metallurgical grade coke __________?
Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis?
Beehive coke oven__________?
Gross and net calorific value of a fuel will be the same__________?
Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal?
Fussain __________?
Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent?
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__________?

Pick out the wrong statement ?

A. High concentration of oxygen in flue gas means high stack loss
B. Gaseous fuels require the least % excess air for complete combustion
C. The ratio of fixed carbon to volatile matter percentage in coal is called its ‘fuel ratio’
D. Calorific value of natural gas is more than that of LPG

Correct Answer: Calorific value of natural gas is more than that of LPG ✔

Last Updated: March 11, 2019