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Fuels and Combustion

Fuels and Combustion
Orsat apparatus

All of these
Can
Gives flue gas analysis on dry basis
Determines N₂ in flue gas indirectly

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Fuels and Combustion
Height of coke oven is limited (say maximum upto 7 metres) mainly by the

Buckling of ram of pusher car at the time of coke pushing
Structural strength of silica bricks
Problem in door cleaning
Problem of uniform heating along its height

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Fuels and Combustion
Width of the coke oven towards coke side is slightly more than that on pusher side to

Facilitate easy discharging of coke as it swells during carbonisation
None of these
Increase the output of the coke
Facilitate uniform heating of the oven

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Fuels and Combustion
Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing?

Ash disposal problem
High power consumption in its transportation
Excessive fly-ash discharge from the stack
Erosion of induced draft fan blades

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Fuels and Combustion
Which of the following is used for making the explosive 'TNT'?

Pyridine
Benzol
Cerosote
Toluene

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Fuels and Combustion
Which of the following has the least calorific value (kcal/Nm³) ?

Blast furnace gas
Sewage gas
Natural gas
Coke oven gas

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