Heating Study guides, Class notes & Summaries

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 ...

Chapter 1: The Airways and Alveoli Test Bank MULTIPLE CHOICE 1. Which of the following structures is responsible for substantially increasing the surface area of the nasal cavity? a. Nasal septum b. Nares c. Turbinates d. Nasal fossae ANS: C The convoluted design of the turbinates greatly increases the surface area of the nasal cavity. DIF: Recall REF: 4 2. What type of epithelium covers the posterior two-thirds of the nasal mucosa? a. Squamous b. Squamous, nonciliated c. Pseudost...

AQA GCSE COMBINED SCIENCE: TRILOGY 8464/P/1H Higher Tier Physics Paper 1H Question Paper + Mark scheme [MERGED] June 2022 *junp1h01* IB/M/Jun22/E13 8464/P/1H For Examiner’s Use Question Mark 1 2 3 4 5 6 TOTAL Time allowed: 1 hour 15 minutes Materials For this paper you must have: • a ruler • a scientific calculator • the Physics Equations Sheet (enclosed). Instructions • Use black ink or black ball-point pen. • Pencil should be used for drawing. • Fill i...

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1/2" correct answers Sight Glass Minimum Connection 3/4" correct answers Low Water Cut-off Draw Minimum Connection 1" correct answers Water Column Minimum Connection 3/4" correct answers Control Manifold Minimum Connection 1/4" correct answers Sight Glass Drain Minimum Connection 1" correct answers Bottom Blow-Off Minimum Connection 2 1/2" correct answers Bottom Blow-Off Maximum Connection 2 1/2" correct answers Surface Blow-Down Maximum Connection 3" correct ans...

What must you do if you notice code violations in a homeowners house? - Answer Notify them and recommend ways to address them What must be done when performing an annual tune-up on a heating system? - Answer A combustion efficiency test and a copy must be posted on site Whenever a furnace, direct fired hot water heater, or boiler is installed the total installation must be brought into compliance with what requirements BEFORE appliance can be fired? - Answer NFPA 31 When an eme...

Esco Heating 208 Exam Questions and Answers

The following are types of what? LPG, CNG, piped natural gas or solid fuel (coke). - correct answer Portable fueled salamanders/space heaters National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL) for carbon monoxide - correct answer 35 parts per million (ppm) over an 8 hour period What is the third leading cause of fires in buildings under construction ? - correct answer temporary heating What is direct heat flow through matter? - correc...

Special Engineers Exam A. 10 sq ft heating surface - correct answer For the purpose of rating boiler horsepower for an engineers license only, how many boiler square feet of boiler shall be equivilent to one boiler horsepower on a Boiler? A. 10 sq. ft. heating surface B. 5 sq. ft. heating surface C. 2.5 sq ft heating surface D. 20 sq ft heating surface B. Boilers operating at a steam or other vapor pressure of 15 psig or less, or a hot water or other liquid boiler that doesnt exceed 16...