Fuels And Combustion | Test For NTS PPSC FPSC, TEST

Pick out the wrong statement ?

A. Percentage of ash in coke produced from medium coking coal is more than that in coal
B. The calorific value (kcal/Nm3) of coke oven gas reduces on removal of hydrogen from it by
cryogenic method
C. Ash is normally removed as ‘fly-ash’ in Kopper-Totzek process of coal gasification
D. Coal based fertiliser plants in India at Talcher (Orissa) and Ramagundam (A.P) employ
Kopper-Totzek process of coal gasification

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Category: Fuels and Combustion

To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in___________________?

Washing of coal decreases its_________________?

Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about ______________°C?

Steam is intermittently admitted into the fuel bed during the production of producer gas to__________________?

When incomplete combustion loss is high, the flue gas analysis shows large amount of ________________?

In flue gas analysis by Orsat’s apparatus, carbon dioxide is absorbed by______________________?

‘Wind loss’ resulting from unscientific storage of coal may be the order of about _____________ percent?

Gas yield in the Kopper-Totzek coal gasifier is about ______________ Nm3/ton coal (ash = 35%)?

If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be_____________?

Pick out the wrong statement ?