Decarburisation of steel Is favoured by CO₂ Affects its crystalline structure All of these Is the removal of carbon from iron carbide (Fe₃C) TRUE ANSWER : ? YOUR ANSWER : ?
The advantages of firing pulverised coal in the furnace lies in the fact that, it Permits the use of low fusion point ash coal Permits the use of high ash content coal Accelerates the burning rate and economises on fuel consumption All of these TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is the most suitable for preheating combustion air above 650°C ? None of these Regenerator Ceramic recuperator Metallic recuperator TRUE ANSWER : ? YOUR ANSWER : ?
Use of pulverised coal in boilers provides Better combustion Less erosion on furnace wall Higher calorific value Smokeless burning TRUE ANSWER : ? YOUR ANSWER : ?
In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time? Regenerator Waste heat boiler Recuperator None of these TRUE ANSWER : ? YOUR ANSWER : ?
In reverberatory furnace, charge is heated mainly by None of these Natural convection Conduction Radiation of heat from the roof of the combustion chamber TRUE ANSWER : ? YOUR ANSWER : ?
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent. 85 50 99 65 TRUE ANSWER : ? YOUR ANSWER : ?
Ostwald charts are meant for Computing the excess/deficiency of combustion air None of these Calculation of flue gas temperature Computation of flue gas analysis TRUE ANSWER : ? YOUR ANSWER : ?
__________ furnace is not an electric furnace. Induction Resistance Pot Arc TRUE ANSWER : ? YOUR ANSWER : ?
In low or standard frequency induction furnace, heat is produced by the Induction and resistance None of these Combination of induced current and skin effect Current flow through a heating element TRUE ANSWER : ? YOUR ANSWER : ?