- Study guides, Class notes & Summaries

Comprehensive Solutions Manual for Engineering Economy, 9th Edition by Leland Blank and Anthony Tarquin. This manual provides fully worked-out solutions to end-of-chapter problems, covering the essential principles of engineering economy. Topics include time value of money, cash flow analysis, interest and rate of return calculations, replacement and depreciation, benefit-cost analysis, and decision-making under risk and uncertainty. An essential study aid for engineering students and profes...

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11 pages

Written in 2025/2026

Grade A+

LECTARTHUR

Unlock the ultimate bridge between academic theory and elite engineering practice. The Elite Universal Test Bank: Engineering Circuit Analysis is an S-Tier, premium academic resource engineered for high-achieving students and future professionals. This meticulously crafted document bypasses rote memorization, teaching you to architect, troubleshoot, and optimize complex electrical networks with diagnostic precision. Exact Contents Included: The "Critical Axioms" Cheat Sheet: A foundati...

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19 pages

Written in 2026/2027

Grade A+

SilverBack

Welcome to the ultimate S-Tier academic and professional resource designed exclusively for mastering the ACI Shotcrete Nozzleman Board Certification. This is not a standard study guide; it is an elite, universal test bank forged to bridge the gap between rigorous academic standards (ACI 506R, ACI 506.2, ACI 305R) and high-stakes field execution. Designed for apex practitioners, structural engineers, and heavy civil contractors, this comprehensive document completely eliminates the guesswork f...

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22 pages

Written in 2026/2027

Grade A+

Kanteez

General Studies & Engineering Aptitude Full Exam |Already Graded A+

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10 pages

Written in 2026/2027

Grade A+

Studyclub

ELDT Theory Unit, Part 1 - Mastery Test with all Correct & 100% Verified Answers |Latest Version |Already Graded A+

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5 pages

Written in 2025/2026

Grade A+

Studyclub

Prepare for your Principles of Engineering semester final with confidence. This comprehensive study guide and testbank is designed for high school PLTW POE students, college engineering technology majors, and self-learners who want to master key concepts before exam day.

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9 pages

Written in 2025/2026

Grade A+

ProfessorVincent

2 - Refrigerant cylinders should be transported in the upright position to ensure; correct answer C - Pressure relief valve 3 - Tools used during the installation or service of systems charged with a flammable refrigerant must be; correct answer D - rated for use with flammable refrigerants 4 - The first stage of the evacuation process which removes non-condensables from a system is called; correct answer A - Degassing 5 - Once a flammable refrigerant has been recovered and stored in a ...

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7 pages

Written in 2025/2026

Grade A+

starwid

A complex process that cleans, filters, and tests a refrigerant to meet the "like-new" purity level specified in AHRI Standard 700 is correct answer reclamation A metric that is used to measure a refrigerant's environmental impact as a greenhouse gas is correct answer Global Warming Potential (GWP) A refrigerant blend behaves like a single compound refrigerant is called a(n) correct answer azeotropic blend A refrigerant oil that is hygroscopic will correct answer absorb moistur...

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3 pages

Written in 2025/2026

Grade A+

starwid

____ __ __________ is a measurement of the amount of heat released when a substance, in this case, a refrigerant, burns. correct answer Heat of combustion (HOC) ______ ___________ _______ can activate mechanical ventilation systems, activate a solenoid to force the systems into a pump down, de-energize the system completely, or a combustion of mitigation responses using control logic electronics. correct answer Active refrigerant sensors _______ ________ can form when any fluoride-containi...

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5 pages

Written in 2025/2026

Grade A+

starwid

___ is used as the baseline measurement for global warming potential and has a value of 1. correct answer CO₂ A refrigerant's _____ _________ _________ (___) measures its ability to destroy ozone in the stratosphere. correct answer ozone depletion potential (ODP) Additional components that may be installed on the high side of a refrigeration circuit are ________ and ______ ____ _____. correct answer receiver and liquid line dryer Additional components that may be installed on the l...

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4 pages

Written in 2025/2026

Grade A+

starwid

2 - Refrigerant cylinders should be transported in the upright position to ensure; correct answer C - Pressure relief valve 3 - Tools used during the installation or service of systems charged with a flammable refrigerant must be; correct answer D - rated for use with flammable refrigerants 4 - The first stage of the evacuation process which removes non-condensables from a system is called; correct answer A - Degassing 5 - Once a flammable refrigerant has been recovered and stored in a ...

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17 pages

Written in 2025/2026

Grade A+

starwid

________ of a combustible gas is the rate at which a flame front spreads relative to the unburned gas ahead of the flame. correct answer Burning velocity _________ is equal to 760,000 microns. correct answer Atmospheric Pressure (0 psig) __________ can form when any flouride-containing refrigerant, even non-flammable A1 refrigerants, undergoes complete or incomplete combustion, or thermal decomposition. correct answer Hydrogen Fluoride (HF) __________ requires that if flammable refriger...

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7 pages

Written in 2025/2026

Grade A+

starwid

___________ are designed and installed to prevent accumulation and/or ignition of flammable refrigerant vapors should a leak occur. correct answer mitigation strategies ___________ can activate mechanical ventilation systems, activate a solenoid to force the system into a pump down, de-energize the system completely, or a combination of mitigation responses using control logic electronics. correct answer active refrigerant sensors ___________ can form when any fluorine-containing refrigera...

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15 pages

Written in 2025/2026

Grade A+

starwid

A complex process that cleans, filters and tests a refrigerant to meet the like new level specified IN AHRI standard 700 is correct answer Reclamation A refrigerant oil that is Hydro scopic will correct answer Absorb moisture An uppercase letter designation ( R - 407A , R- 407B , R - 407C ) is used when refrigerant blends are : correct answer Composed of the same refrigerants , but with different percentages of each . Atmospheric pressure OPSIG ) is equal to approximately correct answer...

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4 pages

Written in 2025/2026

Grade A+

starwid

____ ______ climate necessitates slightly lower airflow 325-350 cfms per ton of cooling correct answer High humidity climates A _____ refrigerant blend is a mixture of two or more refrigerant that can separate or fractionate into its original components correct answer Zeotropic a globally recognized, independent safety certification organization. Approves additional refrigeration system components. correct answer Underwriters laboratories UL A proper ______/_____ procedure should be use...

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11 pages

Written in 2025/2026

Grade A+

starwid

A2L class types. Class 1 correct answer all mechanical components and equipment is housed in occupied spaces. A2L class types. Class 2 correct answer compressors are in outside areas or separate plant rooms. A2L class types. Class 3 correct answer all refrigerant equipment is sited outside, or in a plant room A2L class types. Class 4 correct answer all refrigeration containing parts are located in a ventilated enclosure DSEAR meaning. correct answer Dangerous substances and explosive...

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6 pages

Written in 2025/2026

Grade A+

starwid

______________________ is used to classify a refrigerant according to the potential hazards involved with its use, specifically toxicity and flammability correct answer ASHRAE Standard 34 2L refrigerants have a burning velocity of ____________________________ or less, making them less likely to sustain combustion after the initial ignition source has been removed. correct answer 10 cm/s (3.9 inches per second) A complex process that cleans, filters, and tests a refrigerant to meet the "...

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8 pages

Written in 2025/2026

Grade A+

starwid

A complex process that cleans, filters, and tests a refrigerant to meet the "like new" purity level specified in AHRI standard 700 is______________ correct answer Reclamation A metric that is used to measure a refrigerant environmental impact as a greenhouse gas is_________________ correct answer Global warming potential(GWP) A refrigerant blend behaves like a single component refrigerant is called a_________________ correct answer azeotropic blend A2L refrigerant have a flammabil...

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7 pages

Written in 2025/2026

Grade A+

starwid

____ is a near-azeotropic, refrigerant blend that has a GWP of 466. It is an HFC/HFO blend madeup HFC-32 and HFO-1234yf. It is charged as a liquid to avoid fractionation and has a very lowtemperature glide (about 2.5°F). correct answer R-454B _____ is a single-compound, HFC refrigerant that has a GWP of 675. It can be charged as a liquid or avapor and does not fractionate or have a temperature glide. correct answer R-32 _____ is an HFO refrigerant with a GWP of less than 1. It is primaril...

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10 pages

Written in 2025/2026

Grade A+

starwid

A refrigerant's ____ measures its ability to destroy the ozone in the stratosphere correct answer ODP (Ozone Depletion Potential) Additional components that may be installed on the high side of a refrigeration circuit are correct answer Liquid line drier and Receiver Additional components that may be installed on the low side of a refrigeration circuit are correct answer Suction line drier and Accumulator CO2 is the baseline measurement for GWP and has a value of correct answer 1 ...

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3 pages

Written in 2025/2026

Grade A+

starwid

A cyllinder of R-410a stored at 70 degrees F should show what pressure? correct answer 200.8 psig A manifold gauge is properly connected to the suction and discharge valves on a compressor, in order to read the high and low side, what position should the gauge manifold valves be in? correct answer n order to read the high and low side pressures in the system, the valves should be fully clockwise A system with a thermostatic expansion valve (TXV) will try to maintain a constant..? correct a...

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12 pages

Written in 2025/2026

Grade A+

starwid