Sulphur dioxide present in the industrial chimney exhaust gases causes

Sulphur dioxide present in the industrial chimney exhaust causes

A

Respiratory and lung disease

B

Reduction in plant's productivity owing to acid rain

C

Corrosion building materials

D

All of the above

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

The draught produced, for a given height of the chimney and given mean temperature of chimney gases

A

decreases with increase in outside air temperature

B

increases with increase in outside air temperature

C

remains the same irrespective of outside air temperature

D

may increase or decrease with increase in outside air temperature

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

The draught produced by steel chimney as compared to that produced by brick chimney for the same height is

A

Less

B

More

C

Same

D

May be more or less

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

Temperature of gases at end of compression as compared to exhaust gases in a gas turbine is

A

Higher

B

Lower

C

Equal

D

Can't be compared

Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes

A

Fading of dyes on textiles

B

Corrosion, tarnishing & soiling of metals

C

Reduced strength of textiles

D

All of the above

Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of

A

Higher effectiveness of boiler

B

High calorific value coal being burnt

C

Fouling of heat transfer surfaces

D

Raising of steam temperature

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

$${\text{V}} = 2{\text{g}}\sqrt {{\text{H}}'} $$

Sulphur dioxide present in the industrial chimney exhaust gases causes

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