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Fuels and Combustion

Fuels and Combustion
Ionisation potential applied across the electrodes of electrostatic tar precipitator is around

230 V DC
60 KV DC
60 KV AC
230 V AC

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Fuels and Combustion
Temperature of coke oven gas just before entering into saturator (for recovery of NH₃) is about __________ °C.

180
65
120
30

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Fuels and Combustion
Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.

O₂ content
Dew point
CO content
CO₂ content

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Fuels and Combustion
Which of the following will be unsuitable for dust cleaning from flue gas at 400°C from a pulverised coal fired boiler ?

Bag filter
Hydrocyclones
Wet scrubber
Multicyclones

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Fuels and Combustion
Coke oven gas is stripped of its H₂S and mercaptans content by

Adsorption on bog iron bed
Adsorption on silica gel
Bubbling it through dilute sulphuric acid
Absorption in wash oil

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Fuels and Combustion
Preheating of __________ the flame temperature.

Either the fuel or the air or both, increases
Combustion air decreases
Either the fuel or the air does not affect
The gaseous fuel before combustion decreases

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