Steam Boilers, Engines, Nozzles and Turbines Film boiling occurs at Atmospheric pressures Medium pressures Very low pressure Very high pressures Atmospheric pressures Medium pressures Very low pressure Very high pressures 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 = 0.5 V² cosα Vb = V cosα Vb = 0.5 V cosα Vb = V² cosα Vb = 0.5 V² cosα Vb = V cosα Vb = 0.5 V cosα Vb = V² cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In an impulse reaction turbine, the pressure drops gradually and continuously over Moving blades Both fixed and moving blades None of these Fixed blades Moving blades Both fixed and moving blades None of these Fixed blades ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The height of chimney in a power plant is governed by The draft to be created Quantity of flue gases to be handled Control of pollution Limitation of construction facilities The draft to be created Quantity of flue gases to be handled Control of pollution Limitation of construction facilities ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The high pressure and low pressure cylinders in a receiver type compound engine are regarded as having cranks None of these 180° to each other 90° to each other 0° to each other None of these 180° to each other 90° to each other 0° to each other ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The friction present between the steam and the nozzle surfaces reduces the heat drop by 25 to 40% 15 to 25% 10 to 15% 40 to 60% 25 to 40% 15 to 25% 10 to 15% 40 to 60% ANSWER DOWNLOAD EXAMIANS APP