STATIONARY ENGINEER LICENSE PRACTICE GRADE 4 QUESTIONS AND VERIFIED COMPLETE WELL EXPLAINED ANSWERS WITH RATIONALES 100% CORRECT VERIFIED BY EXPERTS LATEST UPDATE 2024 GRADED A+ GUARANTEED SUCCESS AFTER DOWNLOAD (ALL YOU NEED TO PASS YOUR EXAMS what is a boiler a closed metal container (pressure vessel) which water is heated to produce steam or heated water what is steam the vapor that forms when water is heated to its boiling point when did the greatest impact of the use of steam power occur during the industrial revolution 18th and early 19th century who invented the steam engine and when James Watt of Scotland in 1736 How is steam produced water is heated to 212 degrees at atmospheric pressure state the first law of thermodynamics energy cannot be created or destroyed but may be changed from one form to another state the second law of thermodynamics heat always flows from a material at a high temperature to a material at a low temperature what is sensible heat heat that causes a temperature change that can be measured with a thermometer or sensed by a person what is latent heat head identified by a change of state and no temperature change what is a BTU the amount of energy required to raise the temperature of 1 lb of water 1 degree fahrenheit name 3 ways heat is transferred conduction, convection, and radiation How is heat generated in a boiler by the combustion of a fuel name the 3 conditions of combustion perfect, complete. or incomplete name the 3 classifications of combustion air primary air, secondary air, and excess air describe the 4 systems all steam boilers operate using feedwater system, fuel system, draft system, and steam system what does the feedwater system do? supplies the proper amount of water to the boiler what does the draft system regulate? the flow of air to and from the boiler what does the fuel system do provides fuel for combustion to generate the necessary heat in the boiler what does the steam system do? collects, controls, and distributes the steam produced an the boiler what are symbols used
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