4th Class Power Engineering Unit A12 Chapter 1: Combustion Rated A+

4th Class Power Engineering Unit A12 Chapter 1: Combustion Rated A+ The amount of air delivered for combustion above the theoretical air is called: Select one: a. free air b. tertiary air c. secondary air d. excess air d The exact amount of air required to supply oxygen for complete combustion is called: Select one: a. theoretical air b. tertiary air c. secondary air d. excess air a Very fine particles, which are a product of the combustion of solid fuels, which are carried out of the furnace with the flue gas: Select one: a. fluidized ash b. particle ash c. fly ash d. flue ash c This is a measure of an oils internal resistance to flow: Select one: a. shear point b. specific gravity c. viscosity d. relative density c The gaseous emissions from anaerobic degradation of organic matter by bacteria is known as: Select one: a. biomass b. biogas c. anaerogas d. bactogas b A mechanically operated fuel feeding mechanism and a grate, used for feeding solid fuel into a furnace over the grate is a: Select one: a. stoker b. spreader c. burner d. sprayer a This combustion recovers energy and decreases the volume of solid waste destined for landfills: Select one: a. municipal solid waste combustion b. herbaceous fuel combustion c. bagasse fuels combustion d. hog fuel combustion a Liquid fuels used for boiler firing that derive from petroleum are often referred to collectively as: Select one: a. gasolines b. fuel oils c. viscous oils d. gaseous fuels b This temperature resistant ceramic material is used in boiler furnaces to protect metal surfaces around burners: Select one: a. insulation b. refractory c. baffling d. fireblock b This type of fuel is made of organic material, usually plant based: Select one: a. biomass b. coal c. hog fuel