In Lurgi coal gasifier__________?
Which of the following has the highest flame velocity ?
Which of the following has the highest theoretical flame temperature ?
Which of the following will generate maximum volume of product of complete combustion (Nm3/Nm3 of fuel) ?
Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing ?
C/H ratio is the minimum in case of__________?
The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorific value will be__________?
The gasification reaction represented by, C + H2O = CO + H2, is__________?
Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around __________ Nm3?
For long flame and easy ignition, the coal used should have__________?
Coke oven gas is stripped of its H2S and mercaptans content by__________?
Presence of nitrogen in combustion air does not reduce the __________?
Coke oven gas constitutes mainly of __________?
Natural draft created by the chimney depends upon __________?
Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has__________?
Purity of coke means that, it is high in carbon and low in __________?
Which of the following is not a ‘manufactured’ fuel ?
Which of the following has the highest gross calorific value ?
With increase in moisture content of coal, its__________?
Calorific value of tar is about __________ Kcal/kg?
Orsat apparatus__________?
Shatter index of the coke is a measure of its__________?
Fuel consumption in coke making can be reduced by__________?
The cooling medium used in dry quenching of coke is__________?
Proximate analysis of coal determines its __________ content?
The maximum percentage of CO2 in a flue gas (from a carbonaceous fuel) can be__________?
Yield of pitch from distillation of high temperature tar is around __________ percent?
Hardgrove Grindability index of four coal samples are given below. Which of them is the easiest to grind ?
Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent?
‘Fat’ coal means a coal having __________?
Naphthalene is removed from coke oven gas by__________?
Octane number of 2, 2, 4 – trimethyl pentane is __________?
Which of the following has the highest calorific value ?
Flue gas obtained on complete combustion of pure acetylene (a hydrocarbon fuel) will contain __________?
Initial pressure of oxygen introduced into the ‘bomb’ of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm?
Which of the following has the highest heat of combustion ?
The calorific value of L.D. converter gas is about __________ Kcal/Nm3?
Abrasion index of blast furnace coke should be around __________ percent?
Power alcohol as compared to straight run gasoline has lower __________?
Which of the following petrographic constituents of coal is non-coking ?
The reaction, C + CO2 ↔ 2CO, taking place during coal gasification is called the __________ reaction?
Presence of phosphorous in metallurgical coal__________?
Which is the heaviest fuel gas out of the following ?
The calorific value of producer gas is around __________ kcal/Nm3?
Short/intense flame is produced during combustion of gaseous fuel by using__________?
During combustion of coal on grate, clinker formation is increased by the__________?
Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm3?
Softening temperature of coal ash is a measure of the __________ of coal?
A sample of natural gas containing 80% methane (CH4) and rest nitrogen (N2) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO, the Orsat analysis in volume percent is__________?
Higher fuel combustion efficiency cannot be achieved by__________?
Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ ppm?

Cannel coal__________________?

A. Is non-coking
B. Has a high volatile matter content and burns with a luminous smoky flame
C. Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is
so named
D. All A., B. and C.

Correct Answer: D. All A., B. and C. ✔

Last Updated: March 08, 2019