Fuels and Combustion Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature? Heat transfer rate to the stock in the furnace Calorific value of the fuel Flame temperature achieved Speed of combustion of fuel Heat transfer rate to the stock in the furnace Calorific value of the fuel Flame temperature achieved Speed of combustion of fuel ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of __________ in a dry gaseous fuel does not contribute to its calorific value. Carbon Oxygen Hydrogen Sulphur Carbon Oxygen Hydrogen Sulphur ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent. < 37% In between 37 & 71% None of these >71% < 37% In between 37 & 71% None of these >71% ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Stack heat losses can be minimised by Controlling the excess air Oxygen enrichment of combustion air Maintaining proper draft in the furnace Using low c.v. fuels Controlling the excess air Oxygen enrichment of combustion air Maintaining proper draft in the furnace Using low c.v. fuels ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Highly reactive coke have lower Coke reactivity index (CRI) Porosity Critical air blast (CAB) value Both B and C Coke reactivity index (CRI) Porosity Critical air blast (CAB) value Both B and C ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the 'carpet loss'. The carpet loss may be of the order of __________ cms. 20 to 40 3 to 4 1 to 2 5 to 15 20 to 40 3 to 4 1 to 2 5 to 15 ANSWER DOWNLOAD EXAMIANS APP
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