What is a btu - Study guides, Class notes & Summaries

The component in which liquid vapor by absorbing heat is called? - ANSWER Evaporator Select the best answer electrical grounding method? - ANSWER Metal stake drive 8 foot into the ground. A _____ valve should be used for throttling purpose? - ANSWER Globe What is the acceptable range for residual sodium sulfite in the boiler maintain? - ANSWER 30-70 What is the BTU content of a gallon of #4? - ANSWER 146,000

NATE Gas Heating Exam Verified Questions and answers 2023 Latest Update Since 1992, the United States Department of Energy has required that all furnaces sold and installed from that date on must have an AFUE of no less than: A: 70% B: 75% C: 78% D: 80% - correct answer C: 78% Many pre-1992 furnaces have efficiencies around . A: 10% B: 40% C: 60% D: 80% - correct answer C: 60% Today, furnaces with AFUE ratings greater than are available. A: 85% B: 90% C: 100% D: 110% - correct ...

NATE CORE STUDY GUIDE(correct answers)to passWhich of the following is not the product of incomplete combustion: Oxides of nitrogen An oil trap is required at the base of the discharge line of the vertical riser is _____ or above 8 feet A diode allows current to flow in one direction: True 1 Watt = _____ Btu 3.41 Current in a closed circuit is limited by which of the following: resistance An oil separator is located in the _____: Discharge line ___...

what is the fire triangle? - Answer- oxygen, fuel, and heat what is the fire tetrahedron? - Answer- oxygen, fuel, heat, and a self-sustained chemical chain reaction what is potential energy? - Answer- stored energy possessed by an object that can be released in the future to perform work what is kinetic energy? - Answer- the energy possessed by a moving object what is the british thermal unit (BTU)? - Answer- the amount of heat required to raise the temperature of 1 pound of water 1 ...

MA 2nd Class Fireman's Practice Exam Questions with 100% Verified Correct Answers At 0 PSIG, how many BTU are necessary to change 1 lb of water at 212 degrees Fahrenheit into 1 lb of steam? a) 144 b) 180 c) 970 d) 1,190 - Correct Answer c) 970 Radiation is a) the movement of liquids or gases created by a temperature difference. b) the transfer of heat by direct molecular contact. c) the weight of a substance compared to unity. d) a form of heat transfer by waves. - Correct Answer ...

MN Boiler License Questions and Answers Already Passed a question an answer what are the conditions necessary for good combustion? a) low sulfur content b) Thermal, thermocoupler, tubular c) turbulence, temperature, time 3T's c) turbulence, temperature, time 3T's why is secondary air necessary in hand fired boilers? a) Necessary to burn the combustible gases b) if primary air should fail c) used only if sulfur content is high a) Necessary to burn the combustible gases when p...

IFSTA 7th Edition Chapter 4: Fire Dynamics True or False: Oxidizers affect a fire because they are combustible - ANSWER False. Oxidizers are not combustible but will support or enhance combustion Physical science is the study of what two things? - ANSWER Matter and energy Oxidation - ANSWER A chemical reaction involvi...

HVAC PRETEST BOMA EXAM QUESTIONS AND ANSWERS Two basic categories of chillers are the ___. a. Compression cycle and absorption b. purge and absorption c. absorption and lithium bromide d. purge and lithium bromide - ANS a. Compression cycle and absorption The five requirements for comfort are proper temperature, humidity, filtration, _____, and ventilation. a. circulation b. velocity c. . d. none of the above - ANS a. circulation The primary function of an expansion dev...

BPI Study Test Questions and Answers 100% Solved What is a BTU? Correct answer British Thermal Unit - the amount of energy required to heat 1 pound of water 1 degrees Fahrenheit Why does warm air rise? Correct answer Warm air is less dense than cool air What is a thermal boundary? Correct answer A line or plane defined by insulation and air barrier What is NOT a goal of air leakage control? Correct answer Meeting code (no code exists for air leakage)

At 0 PSIG, how many BTU are necessary to change 1 lb of water at 212 degrees Fahrenheit into 1 lb of steam? a) 144 b) 180 c) 970 d) 1,190 - Answer-c) 970 Radiation is a) the movement of liquids or gases created by a temperature difference. b) the transfer of heat by direct molecular contact. c) the weight of a substance compared to unity. d) a form of heat transfer by waves. - Answer-d) a form of heat transfer by waves. Steam at 100 PSI and 400 degrees Fahrenheit is a) saturated. ...