Steam Boilers, Engines, Nozzles and Turbines A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit. Stop valve Fusible plug Safety valve Blow off cock Stop valve Fusible plug Safety valve Blow off cock ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle) V = 44.72 K hd V = 44.72 hd K V = 44.72 K hd V = 44.72 K hd V = 44.72 K hd V = 44.72 hd K V = 44.72 K hd V = 44.72 K hd ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines A fusible plug is fitted in small boilers in order to Control steam dome Extinguish fire if water level in the boiler falls below alarming limit Avoid excessive build up of pressure Avoid explosion Control steam dome Extinguish fire if water level in the boiler falls below alarming limit Avoid excessive build up of pressure Avoid explosion ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine. Three times Four times Equal to Twice Three times Four times Equal to Twice ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Proximate analysis of fuel is determination of percentage of Carbon, hydrogen, nitrogen, sulphur, moisture Higher calorific value Fixed carbon, ash, volatile matter, moisture Lower calorific value Carbon, hydrogen, nitrogen, sulphur, moisture Higher calorific value Fixed carbon, ash, volatile matter, moisture Lower calorific value ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The effect of friction on the flow of steam through a nozzle is to Increase the mass flow rate and to increase the exit temperature Increase the exit temperature without any effect on mass flow rate Decrease the mass flow rate and to decrease the wetness of steam Decrease the mass flow rate and to increase the wetness of steam Increase the mass flow rate and to increase the exit temperature Increase the exit temperature without any effect on mass flow rate Decrease the mass flow rate and to decrease the wetness of steam Decrease the mass flow rate and to increase the wetness of steam ANSWER DOWNLOAD EXAMIANS APP
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