Grade 4 Stationary Engineer License Practice Exam Questions And Answers 100% Solved

Grade 4 Stationary Engineer License Practice Exam Questions And Answers 100% Solved what is a boiler - answera closed metal container (pressure vessel) which water is heated to produce steam or heated water what is steam - answerthe vapor that forms when water is heated to its boiling point when did the greatest impact of the use of steam power occur - answerduring the industrial revolution 18th and early 19th century who invented the steam engine and when - answerJames Watt of Scotland in 1736 How is steam produced - answerwater is heated to 212 degrees at atmospheric pressure state the first law of thermodynamics - answerenergy cannot be created or destroyed but may be changed from one form to another state the second law of thermodynamics - answerheat always flows from a material at a high temperature to a material at a low temperature what is sensible heat - answerheat that causes a temperature change that can be measured with a thermometer or sensed by a person what is latent heat - answerhead identified by a change of state and no temperature change what is a BTU - answerthe amount of energy required to raise the temperature of 1 lb of water 1 degree fahrenheit name 3 ways heat is transferred - answerconduction, convection, and radiation How is heat generated in a boiler - answerby the combustion of a fuel name the 3 conditions of combustion - answerperfect, complete. or incomplete name the 3 classifications of combustion air - answerprimary air, secondary air, and excess air describe the 4 systems all steam boilers operate using - answerfeedwater system, fuel system, draft system, and steam system