Steam Boilers, Engines, Nozzles and Turbines A nozzle is said to be a convergent nozzle When the cross-section of the nozzle increases 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 When the cross-section of the nozzle decreases continuously from entrance 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 first decreases from entrance to throat and then increases from its throat to exit When the cross-section of the nozzle decreases continuously from entrance to exit None of these ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The artificial draught is produced by Steam jet Centrifugal fan Chimney Both (A) and (B) Steam jet Centrifugal fan Chimney Both (A) and (B) ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value 1 – moisture content (1- moisture content) (1 + moisture content) 1 + moisture content 1 – moisture content (1- moisture content) (1 + moisture content) 1 + moisture content ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The increase in pressure Lowers the boiling point of a liquid Raises the boiling point of a liquid Reduces its volume Does not affects the boiling point of a liquid Lowers the boiling point of a liquid Raises the boiling point of a liquid Reduces its volume Does not affects the boiling point of a liquid ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The ratio of heat equivalent to brake power to the energy supplied in steam is known as Overall efficiency Brake thermal efficiency Mechanical efficiency Indicated thermal efficiency Overall efficiency Brake thermal efficiency Mechanical efficiency Indicated thermal efficiency ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The principal function of a stop valve is to Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required Increase the temperature of saturated steam without raising its pressure Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required Increase the temperature of saturated steam without raising its pressure Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler ANSWER DOWNLOAD EXAMIANS APP
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