Refrigeration system - Study guides, Class notes & Summaries
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Test Bank For Modern Refrigeration and Air Conditioning 21st Edition By Andrew D. Althouse, Carl H. Turnquist, Alfred F. Bracciano, Daniel C. Bracciano, Gloria M. Bracciano 9781635638776 Chapter 1-55 Complete Guide .
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Test Bank For Modern Refrigeration and Air Conditioning 21st Edition By Andrew D. Althouse, Carl H. Turnquist, Alfred F. Bracciano, Daniel C. Bracciano, Gloria M. Bracciano 8776, 1 . 6044, 1 
 
1 - Careers and Certification 
 
2 - Safety 
 
3 - Service Calls 
 
4 - Energy and Matter 
 
5 - Gases 
 
6 - Basic Refrigeration Systems 
 
7 - Tools and Supplies 
 
8 - Working with Tubing and Piping 
 
9 - Introduction to Refrigerants 
 
10 - Equipment and Instruments for Refrigerant Handling and Servi...
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EPA 609 Technician Certification Questions and Answers Already Passed
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EPA 609 Technician Certification Questions and Answers Already Passed 1. T/F Ozone at ground level ans at Stratosphere is a harmful pollutant FALSE 
2. For determining the Ozone Depletion Potential __________ having been assigned a factor of 1 CFC-11 
3. Ozone layer absorbs and scatters __________ form the sun Ultraviolet light 
4. T/F R-134 is a chlorine-free refrigerant TRUE 
5. a refillable refrigerant cylinder must not be filled above _________ of its full capacity 80% 
6. T/F Ester-based sy...
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NATE AC Service Certification Questions and Answers 2023
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A system is supplied from the factory with charge of 5 pounds 10 ounces for a 15 foot line set. The 
line set is 25 feet long. The manufacturer's instruction sheet specifies 0.6 ounces of refrigeration to be 
added for each added foot of refrigerant line set length. What is the total refrigerant charge for the 
system? 
A. 6 ounces 
B. 5 pounds 
C. 5 pounds 10 ounces 
D. 6 pounds - D. 6 pounds 
15ft - 25ft = 10ft x .6 = 6 ounces 
5 pounds + 10 ounces + 6 ounces 
5 pounds + 16 ounces = 6 pou...
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EPA 608 (TYPE II) Exam 2023 with correct answers
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When a new system has been assembled, the first thing to do is? 
Pressurize the system with an inert gas & leak check. 
 
 
 
After installation of a field-piped R-410A split heat pulp, the unit should first be? 
Pressurized with nitrogen then leak checked. 
 
 
 
The EPA regulations require that any appliances containing more than 50 pounds of refrigerant (except for commercial & industrial process refrigeration) must be repaired when the leak rate exceeds _________ of the charge per year? 
15%
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fdny z51 rmo questions answered 2023 verified graded A+ already passed!
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fdny z51 rmo questions answered 2023 verified graded A+ already passed!the efficiency of the refrigerant cycle is affected by the operation of the condenser. Of the following, a more efficient centrifugal compressor operation results from 
lowering the condenser pressure 
 
 
 
In most semi hermetic compressors, the suction vapor is used for 
cools the motor 
 
 
 
The amount of refrigerant that flows through the orifices of an economizer is determined by the 
difference between the high side an...
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Z-51 Written Exam Questions and Complete Solutions.
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Z-51 Written Exam Questions and Complete Solutions 
 
In a steam turbine, what is the function of a Kingsbury thrust bearing? 
 
A) Maintain first stage steam pressure. 
B) Compensate for coupling misalignment. 
C) Adjust shaft torque at start up. 
D) Maintain axial positioning of the rotor shaft. - Answer: D) Maintain axial positioning of the rotor shaft. 
 
The ratio of actual pressure of water pressure in the atmosphere to the saturated pressure of given temperature is 
 
A) partial pressure....
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Refrigeration System Study Guide 3 – Qs And As
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Refrigeration System Study Guide 3 – Qs And As
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EPA 608 Universal Exam ( ACTUAL EXAM ) Questions With Verified Solutions| ALREADY PASSED
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EPA 608 Universal Exam ( ACTUAL 
EXAM ) Questions With Verified 
Solutions| ALREADY PASSED. 
Refrigeration technicians who violate the Clean Air Act can: - - 
ANSWER Lose their EPA certification, be fined, be required to 
appear in Federal court. 
After 1995, any supplies of CFC refrigerants to service existing 
units in the USA can only come from: - - ANSWER recovery and 
recycling. 
Refrigerant that is recovered can be returned to: - - ANSWER 
the same system or other systems owned by the same...
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EPA 608 Certification Exam with 100% Correct Answers 2024 / 2025
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What date was the sale of CFC's & HCFC's restricted to technicians certified in 
refrigerant recovery? - Correct answer-November 14, 1994 
Section 608 of the Federal Clean Air Act requires technicians to what? - Correct 
answer-Recover all refrigerants. 
The objective of the Clean Air Act is to protect what? - Correct answer-The earth's 
stratosphere. 
HFC's - Correct answer-HydroFlouroCarbon's 
CFC's - Correct answer-ChloroFluoroCarbon's 
ODP - Correct answer-Ozone Depletion Potential 
Which in...
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Unit 9 - Chapter 3 - Refrigeration System Control and Operation Exam Questions and Answers
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Human Machine Interface (HMI) - Answer-Designed to allow operators to receive operational data and alarms on a screen or a series of screens allowing to make changes to set points or operational expectations. 
 
Refrigeration plan capacity must always equal the __________. - Answer-Cooling Load. 
 
Control systems respond to: - Answer-Temp, Pressure and Humidity. 
 
Temperature-Actuated Control (Thermostat) - Answer-Electric controls can be used for starting and stopping a compressor. A thermost...
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