370) The balanced draft furnace is one using

induced draft fan and chimney

induced draft fan and forced draft fan

forced draft fan and chimney

any one of the above

Answer is:

induced draft fan and forced draft fan

remain unaffected

improve

worsen

may improve/worsen depending on size

Answer is:

unburnt carbon in ash

incomplete combustion

ash content

flue gases

Answer is:

supply of excess, air

supply of excess coal

burning CO and unburnts in upper zone of furnace by supplying more air

fuel bed firing

Answer is:

inherent moisture and surface moisture are different things

in some coals moisture may be present upto 40%

some moisture in coal helps in better burning which is not possible with completely dry coal

it increases thermal efficiency

Answer is: