Related Questions

Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.
A Natural
B Induced
C Forced
D Chimney
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?
A CO2
B N2
C O2
D CO
27°C তাপমাত্রায় একটি গ্যাসের বর্গমূল গড় বর্ণবেগ a msec-1 হলে 927°C তাপমাত্রায় তার বর্গমূল গড় বর্গবেগ (msec-1) কত?
A a/2
B 2a
C 3a
D 6a
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
A Tar
B Coke oven gas
C Pitch
D Pulverised coke
The maximum discharge through a chimney occurs when the height of chimney is
A Infinitely long
B Around 200 meters
C Equal to the height of the hot gas column producing draught
D Outside temperature is very low
Stack (chimney) height in a big thermal power plant is dictated by the
A Pollution control aspect
B Draught to be created
C Limitation of constructional facilities
D None of these
The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by
A $${\text{V}} = \sqrt {2{\text{gH}}'} $$
B $${\text{V}} = \sqrt {\frac{{2{\text{g}}}}{{{\text{H}}'}}} $$
C $${\text{V}} = \frac{{{\text{H}}'}}{{\sqrt {2{\text{g}}} }}$$
D $${\text{V}} = 2{\text{g}}\sqrt {{\text{H}}'} $$
Flue gas outlet temperature from the chimney of any furnace should be ideally about __________ °C.
A 50
B 100
C 150
D 250
Smoke density of the flue gas going out of the chimney is measured by a
A Polarograph
B Thermal conductivity meter
C Photo electric cell
D Chromatograph
A device used to heat feed water by utilizing the heat in me exhaust flue gases before leaving through the chimney, is known as
A Economizer
B Fusible plug
C Superheater
D Stop valve

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