Pick out the correct statement ?
Pick out the wrong statement ?
Pick out the wrong statement ?
‘Wobbe index’ is a characteristic of__________?
Spontaneous combustion of coal on storage results due to__________?
White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is__________?
As the equilibrium moisture content of the coal increases, its__________?
Which of the following is not used as a binder in coal briquetting ?
Which of the following fuel gases has the highest calorific value ?
In Orsat’s apparatus, ammoniacal cuprous chloride is used for selectivity absorbing__________?
Which of the following is the most reactive (as regards the formation of CO + H2 from C + H2O) ?
Abel apparatus is used for those oils, whose flash points are __________°F?
Assam (India) coals suffers mainly from the disadvantage of high __________ content?
High temperature in gasification of coal favours__________?
During its calorific value determination by bomb calorimeter, coal is combusted by __________?
Kopper-Totzek coal gasifier__________?
Pensky-Marten apparatus is used for those oils, whose flash points are __________ °F?
The main product of high temperature carbonisation of coal is__________?
Which of the following is not a manufactured fuel ?
A coal having high amount of volatile matter__________?
Yield of charcoal in high temperature carbonisation of wood is about __________ percent?
Fixed carbon in coal is defined as__________?
During combustion of gaseous fuels, deficiency of air__________?
Calorific value of furnace oil is about __________ Kcal/kg?
Air/gas ratio for complete combustion will be the highest for__________?
Which of the following is not a by-product recovered in a high temperature coal carbonisation plant ?
The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always__________?
A good coking coal should have high __________ content?
Gross & net calorific value is the same for__________?
Removal of hydrogen from coke oven gas __________?
Fossil fuels mean__________?
Deficiency of combustion air during combustion of a gaseous fuel__________?
Junker’s calorimeter is used to determine the calorific value of__________?
Which of the following can be made into briquettes without the use of a binder ?
Light oil whose major component is Benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C?
‘Mixed gas’ used in steel plants is a mixture of__________?
Preheating of combustion air is done to __________?
The temperature at which plastic layer formation takes place during carbonisation of coal varies from __________ °C ?
Coal containing large quantity of __________ are difficult to wash?
Narrow coke ovens as compared to wider coke ovens__________?
Bomb calorimeter is used to determine the (where, GCV – Gross Calorific Value. NCV – Net Calorific Value.) ?
‘Fuel’ can be defined as a substance which produces heat by__________?
Actual flame temperature is always lower than the adiabatic flame temperature, because there is__________?
Fuel for a fast breeder nuclear reactor is__________?
C.V. (kcal/Nm3) of gaseous fuels __________ with increase in molecular weight?
Volatile matter content of metallurgical coke may be around __________ percent?
Coking coals are invariably__________?
Ratio of primary air to secondary air increases with increase in the rank of coal, because the__________?
Oxygen required for theoretically complete combustion of 1 Nm3 methane is __________ Nm3?
Calorific value of wood gas is about __________ kcal/Nm3?
The maximum adiabatic flame temperature in air as compared to that in pure oxygen is__________?

Pick out the wrong statement ?

A. Cokes of high reactivity are obtained from weakly coking coals
B. Cokes of high reactivity are obtained from strongly coking coals
C. Reactivity of coke is inversely proportional to its absolute density
D. Abrasion index of the coke is a measure of its hardness

Correct Answer: Cokes of high reactivity are obtained from strongly coking coals ✔

Last Updated: March 08, 2019