Steam Boilers, Engines, Nozzles and Turbines The critical pressure ratio is given by (where p₁ = Initial pressure of steam, and p₂ = Pressure of steam at throat or critical pressure) p₁ + p₂ p₂/p₁ p₁/p₂ p₁. p₂ p₁ + p₂ p₂/p₁ p₁/p₂ p₁. p₂ ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The economiser is used in boilers to Increase thermal efficiency of boiler Extract heat from the exhaust flue gases Increase flue gas temperature Economize on fuel Increase thermal efficiency of boiler Extract heat from the exhaust flue gases Increase flue gas temperature Economize on fuel ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The high steam and low water safety valve is not used in Locomotive boiler Cochran boiler Lancashire boiler Cornish boiler Locomotive boiler Cochran boiler Lancashire boiler Cornish boiler ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Which is not correct statement about effect of sulphur in fuel? It leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low It erodes furnace walls It has heating value It helps in electrostatic precipitation of ash in flue gases It leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low It erodes furnace walls It has heating value It helps in electrostatic precipitation of ash in flue gases ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The best suited coal for chain or traveling grate stoker boiler is High sulphur coal Coking coal Non-coking or free burning coal Pulverized coal High sulphur coal Coking coal Non-coking or free burning coal Pulverized coal ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Pick up wrong statement about desired properties of a good fuel High ignition point Produce minimum smoke and gases High calorific value Ease in storing High ignition point Produce minimum smoke and gases High calorific value Ease in storing ANSWER DOWNLOAD EXAMIANS APP
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