Furnace efficiency is - Study guides, Class notes & Summaries

How do you determine if a boiler has sufficient safety valve capacity - Answer-The accumulation test determines if the valve will discharge all the steam pressure, without allowing the pressure to rise more than 6% more than valve setpoint If a safety valve opens at 100 psi, what pressure should it close at? What requirements governors safety valve blowdowns? - Answer-A: 96-98 psi, with no chatter, with a blowdown of no more than 4 psi of set pressure. A safety valve is limited to how many...

HVAC NATE Gas Heat Exam (New 2024/ 2025 Update) Questions and Verified Answers 100% Correct | A Grade QUESTION A damaged section of double wall vent pipe is to be replaced with a section produced by a different manufacturer: Answer: The installer should check the new section for compatible locking joints. QUESTION If too much primary air is used the flame will: Answer: Lift off the burner. QUESTION What is the problem when a flame on a high efficien...

HESI A2 ENTRANCE EXAM: READING COMPREHENSION, CHEMISTRY, GRAMMAR, BIOLOGY, VOCABULARY & GENERAL KNOWLEDGE, CRITICAL THINKING, ANATOMY & PHYSIOLOGY AND MATH VERSION 2 (With answers) Reading Comprehension Neurologists and biological psychologists have witnessed a sharp increase in the knowledge and understanding of particular structures of the brain over the past two decades. As technology becomes ever more advanced, scientists are able to isolate the functions of even small regions of ...

. If the draft through an appliance is too high, what adjustment should be made. - • Adjust the barometric damper to more of a closed position . One advantage to lightweight combustion chambers is they: - cool down quickly . What is the temperature range of combustion with a new burner and boiler or furnace combination - •d. 450° to 500°F . When testing an ignition transformer using the arc test method , the arc should be a minimum of: - 1/4" 101. The function of the barometric dra...

Oil Burners Questions and Answers Rated A+ According to NFPA31-2001, what is the minimum size of the vent pipe on an oil storage tank 1 1/4 inch Nozzles are available with three different spray patterns: Solid, semi-hollow, hollow What type of motor is used on a residential high pressure oil burner Split phase The most common motor speeds used in amerian made burners are 1725 and 3250 rpm If an oil has a high viscosity It is a thicker oil A service technician performs a com...

BPI Building Science Principles Vocabulary; Questions and Answers 100% Solved the difference in measured air pressure between two areas Correct answer delta P the difference in temperature between two areas Correct answer delta T a material used for controlling air flow Correct answer air barrier how air exchange rate is typically expressed Correct answer ACH (air changes per hour) "a measure of how efficiently a furnace or boiler converts fuel to heat, on average, over a typical year...

What is the 1st offense penalty for engaging in the practice of residential building without a license? - Answer Not less than $5K and not more than $25K and/or 1 year What is the penalty for engaging in the practice of residential building, resulting in a death? - Answer Not less than $5K and not more than $50K and/or 4 years On your individual builder's license application, what should you write as your "business address"? - Answer Your personal address What is the cost of the indi...

What precautions are required when mounting any gas furnace on a wood platform in an attic? Ans: None The gas control valve may be damaged if exposed to an inlet pressure above: Ans: 14 in. W.C. How many elbows and joints should a vent connector have: Ans: As few as possible to reduce resistance of flue gases What conditions, if any may a technician route the exhaust of the furnace into the exhaust vent of the water heater? Ans: Under no conditions may you use the water heater exhaust...

NATE Gas Heating Exam with Complete Solutions 100% Verified Graded A+ In a modern gas furnace, the component that separates the combustion gases from the supply air is the ______. a. gas valve b. heat exchanger c. inducer fan d. plenum box - Correct Answer b (heat exchanger) What type of furnace moves warm air through the conditioned space without a fan? a. Gravity b. Horizontal c. Lowboy d. Upflow - Correct Answer a (Gravity) Furnace heat exchangers generally are made of ______. ...

ABSA 4B Exam Questions with 100% Correct Answers 2024/2025 - answerWarm Air Heating System Equipment In a warm air heating system the cold air return registers are located a) in exterior walls b) in interior locations c) under windows d) in floors e) in ceilings - answerB The major disadvantage of an electric resistance coil furnace for warm air heating is a) the high cost of electricity b) the danger from electric shock c) the high cost of maintenance d) the large size of the fur...