Steam Boilers, Engines, Nozzles and Turbines Blow off cock 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 Increase the temperature of saturated steam without raising its pressure Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit Increase the temperature of saturated steam without raising its pressure Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required 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
Steam Boilers, Engines, Nozzles and Turbines The safety valve on boiler drum compared to safety valve on superheater is set at Lower value Higher value Lower/higher depending on steam flow Same value Lower value Higher value Lower/higher depending on steam flow Same value ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Fire tube boilers are limited to a maximum design working pressure of 100 kg/cm² 1 kg/cm 6 kg/cm 17 kg/cm² 100 kg/cm² 1 kg/cm 6 kg/cm 17 kg/cm² ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The best suited coal for chain or traveling grate stoker boiler is High sulphur coal Coking coal Pulverized coal Non-coking or free burning coal High sulphur coal Coking coal Pulverized coal Non-coking or free burning coal ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines A safety valve usually employed with stationary boilers is Dead weight safety valve High steam and low water safety valve All of the listed here Lever safety valve Dead weight safety valve High steam and low water safety valve All of the listed here Lever safety valve 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 40 to 60% 10 to 15% 25 to 40% 15 to 25% 40 to 60% 10 to 15% 25 to 40% 15 to 25% ANSWER DOWNLOAD EXAMIANS APP
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