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

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 i...

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

Which type of heat transfer takes place by actual physical contact, from molecule to molecule, without displacing the molecules? correct answer: Conduction When designing a boiler, special consideration must be given to heat transmission by... correct answer: Radiation, Conduction and Convection If a boiler produces saturated steam at 212°F at atmospheric pressure, what quantity of heat needs to be added to 10 lbs of water to convert it into steam? correct answer: 11,500 btu (Sat. L...

HVAC NATE Heat Pump Exam (Latest 2024 / 2025 Update) 100% Correct Questions and Verified Answers | Grade A Question: What is the capability of electronic programmable room thermostat to reset the set point early so that the space temperature reaches a set temperature at a specific time called? Answer: Computed recovery Question: What is an important reason for using electronic controls? Answer: They can make decisions based on many inputs. Question: When using a dou...

The Main function of a steam separator in a steam power plant is to correct answer: increase steam quality The MAIN purpose of a dip tube in a low-pressure hot water system is to correct answer: prevent air from entering the main The rating of a unit ventilator is usually determined by a(n) correct answer: anemometer What device is used to record the air-flow-steam-flow relationship of a boiler in a steam plant? correct answer: Steam-flow meter What gas fuel type has the highest ...

A 40 ton gantry crane has been out of service for more than 6 months for structural repair. It is required to be proof tested at ______?? Before being used? 50 tons A body that has a definite volume but no definite shape is? A liquid A cage on a fixed ladder on a commercial ladder cannot extend any closer than how many feet from the ground? OSHA 1910.27 "cages shall extend down the ladder to a point of not less than 7 feet or more than 8 feet above the base of the ladder". ...

G2 Gas Technician Exam (2024/ 2025 Update) Questions and Verified Answers| 100% Correct| Grade A Q: Installation of a propane tank under 1000 USWG what would be the minimum distance from a regulator to a building opening? Answer: 3' Q: If an appliance is less than 85% efficient and non positive it would be considered a? Answer: Category 2. Q: For a steam boiler what would be the most important safety control? Answer: Low water cut off. Q: For a low pressure s...

Gas Technician G2 Exam Review (Latest 2024/ 2025) Questions and Verified Answers| 100% Correct| Grade A Q: A regulator is sized for the load it is to serve by: Answer: Checking the appliance rating place and selecting a regulator for that input range. Q: A propane vaporizer shall not raise the pressure in a tank in excess of: Answer: 215 PSIG Q: Which of the following best describes a bellows type meter? Answer: One which uses pressure differential across an...

Michigan Residential Builder’s License - Questions with 100% Correct Answers What is a network of perforated pipes in bedded in Sand and gravel? A drain field What is BTU? British thermal unit What is the term that means the amount of energy needed to raise 1 pound of water 1°C? BTU What is any thick insulation material that comes in pre-cut widths designed to fit between framing members? Batt What is the most common material for bats and blankets? Fiberglass What is an advantage of blown-i...

HVAC Pretest BOMA Questions and Answers Rated A+ 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 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 a. circulation The primary function of an expansion device is to _...