Stationary Engineer License Practice Grade 4-with 100% verified solutions 2024-2025, Exams of Advanced Education

Download Stationary Engineer License Practice Grade 4-with 100% verified solutions 2024-2025 and more Exams Advanced Education in PDF only on Docsity! Stationary Engineer License Practice Grade 4-with 100% verified solutions 2024-2025 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? how often should a try lever test be performed every 30 days the boiler is in operation at what pressure should the try lever test be performed a minimum of 5 psi who should make adjustments or repairs to a safety valve the manufacturer or an authorized representative of the manufacturer what is a pop test test performed to determine if a safety valve opens at the proper pressure within allowable tolerances what does a steam pressure gauge do displays the amount of pressure in the boiler what is hydrostatic pressure the weight of water (0.433 psi per vertical foot) what is a siphon provides a water seal to prevent contact with live steam what is a vacuum gauge indicates the amount of vacuum (pressure below atmospheric pressure) present in the boiler who should make repairs to a pressure gauge manufacturer or authorized representative of the manufacturer why should you never add water to a boiler if there is no water in a gauge glass adding water to a boiler with a low water condition could cause a boiler explosion what is the purpose of a water column a water column reduces the turbulence of boiler water to provide an accurate water level in the gauge glass what does a gauge glass indicate water level in the boiler what are try cocks used for to determine the boiler water level if the gauge glass is not functiona how is sludge and sediment removed from the gauge glass and water column blowdown what are bottom blowdown valves used for to release water from the bottom of the boiler describe the bottom blowdown valve order the valve closest to the boiler is always opened first and closed last what is the purpose of the bottom blowdown water level control, sludge and sediment removal, and dumping the boiler name 3 components that prevent damage to the sewer system a blowdown tank, blowdown separator, and heat exchanger when should a boiler never be dumped when hot what is a fusible plug a warning device used to indicate extreme overheating of the boiler from a low water condition