Steam Boilers, Engines, Nozzles and Turbines In locomotives, the draught is produced by Steam jet draught Chimney Both combined (A) and (B) Induced draft fan Steam jet draught Chimney Both combined (A) and (B) Induced draft fan ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In an impulse reaction turbine, the pressure drops gradually and continuously over None of these Both fixed and moving blades Moving blades Fixed blades None of these Both fixed and moving blades Moving blades Fixed blades ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle) Vb = V cosα Vb = 0.5 V cosα Vb = 0.5 V² cosα Vb = V² cosα Vb = V cosα Vb = 0.5 V cosα Vb = 0.5 V² cosα Vb = V² cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines A nozzle is said to be a convergent nozzle When the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit None of these When the cross-section of the nozzle increases continuously from entrance to exit When the cross-section of the nozzle decreases continuously from entrance to exit When the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit None of these When the cross-section of the nozzle increases continuously from entrance to exit When the cross-section of the nozzle decreases continuously from entrance to exit ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Tertiary air is the air used to Convert CO (formed in lower zone of furnace) into CO₂ at higher zone Cool the scanners Transport and dry the coal Provide air around burners for obtaining optimum combustion Convert CO (formed in lower zone of furnace) into CO₂ at higher zone Cool the scanners Transport and dry the coal Provide air around burners for obtaining optimum combustion ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The saturation temperature of steam with increase in pressure increases Inversely Rapidly first and then slowly Slowly first and then rapidly Linearly Inversely Rapidly first and then slowly Slowly first and then rapidly Linearly ANSWER DOWNLOAD EXAMIANS APP