Evaporator Study guides, Class notes & Summaries
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Z-51 REFRIGERATION TEST With Correct Solutions 2024 Update
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Z-51 REFRIGERATION TEST With Correct Solutions 
2024 Update 
Efficiency of the refrigerant cycle is affected by the operations of the condenser. Of the following, a more 
efficient centrifugal compressor operation results from: - Answer -Lowering the condensing pressure 
The heat removed from the refrigerant in a condenser is: - Answer -Sensible and latent heat 
The refrigerant unit that you have been assigned to is being taken out of service for a major repair. You 
have been assigned to withdr...
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RETA CARO Test | Questions with 100% Correct Answers | Verified
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Which refrigerant has the highest mass flow requirement at the same evaporator and condensing 
temperature? - CFC-12 
which refrigerant is the first to be phased out by Montreal Protocol - CFC-12 
As the ratio between the evaporator and condensing pressure increases - the theoretical 
discharge temperature increases 
Under the Montreal Protocol - as long as a technician does not perform work on the 
refrigerant containing portions of a system they do not need to be certified 
Refrigerant leaks a...
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ASE A7 Heating Air Conditioning Exam
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A CCOT system has a high high side. Technician A says to suspect the thermostatic expansion valve. Technician B says this system contains an orifice tube. Who is correct? - ANSWER-TECH B is correct. A clogged orifice tube will result in high high side pressure. It can become clogged with contaminants, debris from a damaged compressor, or a broken desiccant bag releasing desiccant into the refrigerant. 
 
A vehicle's air conditioning performance is reduced at low speeds and stop lights, but cool...
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Refrigeration Excellence Questions and Answers Already Passed
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Refrigeration Excellence Questions and 
 
Answers Already Passed 
 
8. Dry type evaporators operate most efficiently with the superheat setting of approximately 
A. 8°F to 12°F 
B. 13°F to 19°F 
 
C. 20°F to 30°F 
 
D. 31°F to 40°F A. 8°F to 12°F 
 
9. An evaporator used to chill liquids is operating within normal superheat setting. But the 
system is not cooling the product properly. Which of the following is most likely the cause? 
A. Overcharge of refrigerant 
B. Undercharge of refr...
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Professional Home Inspector Exam NHIE / TREC Questions with correct Answers
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The inspector is not required to determine ____ ___ of any system or component. - Answer- -Years of age 
-Life expectancy 
-Make model 
 
Horizontal waste pipe should slope ____ inch per foot - Answer- 1/4" per foot if < 3 inch pipe. 
1/8" per foot if > or = to 3 inch pipe 
 
Drip screed - Answer- Also called weep screed. 
Used at the base/bottom of stucco walls to release moisture. 
 
Pressure Vacuum Breaker (PVB) - Answer- Used for Backflow Prevention. 
Lawn Irrigation systems: install...
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HVAC Pretest BOMA Questions Answered Correctly – Expert Verified | Latest Version 2024/2025
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A control can be which of the following? 
a. electrical 
b. mechanical 
c. electrical and mechanical 
d. all of the above - d. all of the above 
A current magnetic relay opens and closes its contacts based on the ____. 
a. current in the start winding 
b. voltage across the start winding 
c. voltage across the run winding 
d. current in the run winding - d. current in the run winding 
A direct expansion-type evaporator is also called a ___. 
a. flooded evaporator 
b. dry-type evaporator 
c. mult...
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FULL NHIE EXAM PRACTICE - Questions and Answers (Complete Solutions)
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FULL NHIE EXAM PRACTICE - Questions and Answers (Complete Solutions) Where you have found evidence of footing settlement, how can you predict whether there will be further settlement? (a) You can count the number of planes of movement. (b) You can determine the type of foundation material. (c) You cannot predict settlement from a single inspection. (d) You can determine the depth of the footing. You typically identify a Freon leak (a) As an oil stain (b) As refrigerant coming out of the Freon ...
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Commercial Refrigeration Certification Correct 100%
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In a dry type (direct expansion) evaporator, liquid refrigerant must boil away as close to the end of the coil as possible in order to: 
A. operate at high efficiency. 
B. ensure that frost does not accumulate. 
C. sub-cool the compressor. 
D. ensure proper oil return. - ANSWER A. operate at high efficiency. 
 
The difference between the temperature of the refrigerant boiling in the evaporator and the temperature at the evaporator outlet is known as: 
A. evaporator superheat. 
B. latent heat. 
C...
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Refrigeration Excellence Complete Questions & Answers!!
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1. In a dry type (direct expansion) evaporator, liquid refrigerant must boil away as close to the end of the coil as possible in order to: 
A. Operate at high-efficiency 
B. Ensure that Frost is not accumulate 
C. Subcool the compressor 
D. Ensure proper oil return - ANSWER A. Operate at high-efficiency 
 
2. The difference between the temperature of the refrigerant boiling in the evaporator and the temperature at the evaporator outlet is known as 
A. Evaporator superheat 
B. Latent heat 
C. Eva...
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Z-51 WRITTEN TEST QUESTIONS AND ANSWERS
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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. 
B) relative humidity. 
C) humidity effect. 
D) absolu...
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