Steam Boilers, Engines, Nozzles and Turbines Which is not the correct statement about moisture in coal? Some moisture in coal helps in better burning which is not possible with completely dry coal Inherent moisture and surface moisture are different things In some coals moisture may be present up to 40% It increases thermal efficiency Some moisture in coal helps in better burning which is not possible with completely dry coal Inherent moisture and surface moisture are different things In some coals moisture may be present up to 40% It increases thermal efficiency ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines By compounding the expansion of steam in two or more cylinders, the length of stroke Decreases Does not change None of these Increases Decreases Does not change None of these Increases ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity ‘V’ at inlet) Vb = V cos α Vb = 0.5 V cosα Vb = 0.5 V² cosα Vb = V² cos α Vb = V cos α Vb = 0.5 V cosα Vb = 0.5 V² cosα Vb = V² cos α ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The indicated thermal efficiency is defined as the Ratio of heat equivalent to indicated power to the energy supplied in steam Ratio of brake power to the indicated power Ratio of thermal efficiency to the Rankine efficiency Product of thermal efficiency and Rankine efficiency Ratio of heat equivalent to indicated power to the energy supplied in steam Ratio of brake power to the indicated power Ratio of thermal efficiency to the Rankine efficiency Product of thermal efficiency and Rankine efficiency ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The expansion of steam, as it flows over the blades in reaction turbine, represents Throttling process Isothermal process Isentropic process Free expansion process Throttling process Isothermal process Isentropic process Free expansion process ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines On Millier chart, the constant pressure lines Diverge from left to right Diverge from right to left Are equally spaced throughout First rise up and then fall Diverge from left to right Diverge from right to left Are equally spaced throughout First rise up and then fall ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS