Stationary Engineer License Practice Grade 4 Questions with 100% Correct Answers What is a boiler Correct Answer a closed metal container (pressure vessel) which water is heated to produce steam or heated water
What is steam Correct Answer the vapor that forms when water is heated to its boiling point
When did the greatest impact of the use of steam power occur Correct Answer during the industrial revolution 18th and early 19th century
Who invented the steam engine and when Correct Answer James Watt of Scotland in 1736
How is steam produced Correct Answer water is heated to 212 degrees at atmospheric pressure
State the first law of thermodynamics Correct Answer energy cannot be created or destroyed but may be changed from one form to another
State the second law of thermodynamics Correct Answer heat always flows from a material at a high temperature to a material at a low temperature
What is sensible heat Correct Answer heat that causes a temperature change that can be measured with a thermometer or sensed by a person
What is latent heat Correct Answer head identified by a change of state and no temperature change
What is a BTU Correct Answer the amount of energy required to raise the temperature of 1 lb of water 1 degree fahrenheit
Name 3 ways heat is transferred Correct Answer conduction, convection, and radiation
How is heat generated in a boiler Correct Answer by the combustion of a fuel
Name the 3 conditions of combustion Correct Answer perfect, complete. Or incomplete
Name the 3 classifications of combustion air Correct Answer primary air, secondary air, and excess air Describe the 4 systems all steam boilers operate using Correct Answer feedwater system, fuel system, draft system, and steam system
What does the feedwater system do? Correct Answer supplies the proper amount of water to the boiler
What does the draft system regulate? Correct Answer the flow of air to and from the boiler
What does the fuel system do Correct Answer provides fuel for combustion to generate the necessary heat in the boiler
What does the steam system do? Correct Answer collects, controls, and distributes the steam produced an the boiler
What are symbols used for Correct Answer to represent lines, boiler fittings, and accessories on drawings
What is MAWP Correct Answer Maximum Allowable Working Pressure. The recommended maximum pressure at which a boiler can be safely operated
What is the MAWP of a low pressure boiler Correct Answer not more than 15 psi
What is the MAWP of a high pressure boiler Correct Answer more than 15 psi
What is a firetube boiler Correct Answer a boiler in which heat and gases of combustion
pass through tubes surrounded by water
What is a watertube boiler Correct Answer a boiler in which water passes through tubes
surrounded by gases of combustion
What is a cast iron boiler Correct Answer a boiler that has gases of combustion flowing around cast iron sections that contain water
What is an electric boiler Correct Answer a boiler that generates heat by electrical resistance or an electric are
What is a condensing boiler Correct Answer a boiler designed to recover some of the heat normally discharged to the atmosphere in the gases of combustion
What does a safety valve do Correct Answer prevents the boiler from exceeding its MAWP and is the most important valve on a boiler
What is the safety valve capacity Correct Answer the amount of steam in pounds per hour that the safety valve is capable of venting at its rated pressure
What is steam Correct Answer the vapor that forms when water is heated to its boiling point
When did the greatest impact of the use of steam power occur Correct Answer during the industrial revolution 18th and early 19th century
Who invented the steam engine and when Correct Answer James Watt of Scotland in 1736
How is steam produced Correct Answer water is heated to 212 degrees at atmospheric pressure
State the first law of thermodynamics Correct Answer energy cannot be created or destroyed but may be changed from one form to another
State the second law of thermodynamics Correct Answer heat always flows from a material at a high temperature to a material at a low temperature
What is sensible heat Correct Answer heat that causes a temperature change that can be measured with a thermometer or sensed by a person
What is latent heat Correct Answer head identified by a change of state and no temperature change
What is a BTU Correct Answer the amount of energy required to raise the temperature of 1 lb of water 1 degree fahrenheit
Name 3 ways heat is transferred Correct Answer conduction, convection, and radiation
How is heat generated in a boiler Correct Answer by the combustion of a fuel
Name the 3 conditions of combustion Correct Answer perfect, complete. Or incomplete
Name the 3 classifications of combustion air Correct Answer primary air, secondary air, and excess air Describe the 4 systems all steam boilers operate using Correct Answer feedwater system, fuel system, draft system, and steam system
What does the feedwater system do? Correct Answer supplies the proper amount of water to the boiler
What does the draft system regulate? Correct Answer the flow of air to and from the boiler
What does the fuel system do Correct Answer provides fuel for combustion to generate the necessary heat in the boiler
What does the steam system do? Correct Answer collects, controls, and distributes the steam produced an the boiler
What are symbols used for Correct Answer to represent lines, boiler fittings, and accessories on drawings
What is MAWP Correct Answer Maximum Allowable Working Pressure. The recommended maximum pressure at which a boiler can be safely operated
What is the MAWP of a low pressure boiler Correct Answer not more than 15 psi
What is the MAWP of a high pressure boiler Correct Answer more than 15 psi
What is a firetube boiler Correct Answer a boiler in which heat and gases of combustion
pass through tubes surrounded by water
What is a watertube boiler Correct Answer a boiler in which water passes through tubes
surrounded by gases of combustion
What is a cast iron boiler Correct Answer a boiler that has gases of combustion flowing around cast iron sections that contain water
What is an electric boiler Correct Answer a boiler that generates heat by electrical resistance or an electric are
What is a condensing boiler Correct Answer a boiler designed to recover some of the heat normally discharged to the atmosphere in the gases of combustion
What does a safety valve do Correct Answer prevents the boiler from exceeding its MAWP and is the most important valve on a boiler
What is the safety valve capacity Correct Answer the amount of steam in pounds per hour that the safety valve is capable of venting at its rated pressure
