Environmental Engineering in CE
In troposphere (the weather domain), the temperature 't' at height 'h' above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

t = 15 - 0.0065h
t = 15 - 0.0035h
t = 15 + 0.0065h
t = 0.0035h -15

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Environmental Engineering in CE
Smoke is produced due to

Poor design & overloading of furnace
All of these
Poor quality of fuel and improper mixing of fuel & combustion air
Insufficient supply of combustion air and insufficient time for combustion

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