Approved refrigerant - Study guides, Class notes & Summaries

1. 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: A. Raising the condenser liquid level to the maximum B. Lowering the chilled water set point C. Raising the condenser head pressure D. Lowering the condensing pressure - Answer-D. Lowering the Condensing Pressure 2. The heat removed from the refrigerant in a condenser is: A. Sensible and latent heat B. Latent ...

FDNY Z51 RMO Set Test Questions And Verified Correct Solutions | Updated 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: a. Raising the condenser liquid level to the maximum b. Lowering the chilled water set point c. Raising the condenser head pressure d. Lowering the condensing pressure d. Lowering the condensing pressure The heat removed from the refrigerant in ...

R-12 is a _______________ type of refrigerant CFC Section 608 HVAC/R Technicians cannot buy refrigerant in quantities less than ________________ 20 LBS According to ____________ service shops must certify to the EPA that they own approved recovery. CAA Skin or eye contact with fluorocarbon refrigerants can result in IRRITATION, FROSTBITE, DEATH T/F Refrigerant are lighter than air: FALSE Which of the following refrigerants has minimum or zero ozone depletion potential: ...

EPA 608 Exam Practice Questions 1-100EPA 608 Exam Practice Questions 1-100 Ozone depletion is caused by _______ in HFC refrigerants. - Answer chlorine CFCs and HCFCs ________ making them capable capable of reaching the stratospheric ozone layer. - Answer do not dissolve in water or easily break down in the atmosphere According to the Rolanda-Molina theory, ________ are destroyed by each chlorine atom in the stratosphere. - Answer 100,000 ozone molecules The stratospheric ozone layer prote...

HVAC: EPA 608 Certification Exam Questions and Answers Latest Updated 2024/2025 (GRADED A+) What type of lubricant is used with HCFCs? CORRECT ANSWERAlkylbenzene lubricant What is difference b/w ternary blend a azeotropic blend? CORRECT ANSWERTernary blends are threepart mixtures whereas azeotropic blends are blends of two or more compounds that act like a single compound. What is the trait of a hygroscopic lubricant? CORRECT ANSWERIt absorbs (takes on) moisture What is temperature glide and...

Recovery equipemnt used for the service or repair of small appliances must be certified by an EPA approved lab if the recovery equipment was made after November 15, 1993 Recovery devices made before 11-15-93 and are used for recovery of refrigerant from small appliances must be capable of: recovering 80% of the refrigerant whether or not the compressor is operating or achieving a 4 inch vacuum under conditions of ARI 740-1993 EPA's definition of a small appliance includes: a device manufac...

FDNY Z-51 EXAM TEST ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A+ 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 What happens when a steam turbine reaches critical speed Turbine will vibrate violently What Device automatically controls the speed of a steam turbine Governor valve Under what circumstances is...

FDNY Z51 EXAM 2024 WITH 350+ REAL EXAM QUESTIONS AND 100% CORRECT ANSWERS GRADED A/ REAL FDNY Z-51 EXAM 2024/2025 LATEST VERSION(BRAND NEW!!) What happens when a steam turbine reaches critical speed? - ANSWER-Turbine will vibrate violently In a steam turbine, what is the function of the kingsbury thrust bearing - ANSWER-Maintain axial positioning of the rotor shaft The efficiency of the refrigerant cycle is affected by the operation of the condenser. of the following. a more efficient...

EPA Certification Exam |Questions and Verified Answers| 100% Correct| Grade A (Latest 2023/ 2024 Update) Q: The Molecule found in the stratosphere that indicates stratospheric ozone depletion is taking place is: Answer: Chlorine monoxide Q: The following actions would violate the clean air act (CAA): Answer: Knowingly releasing Class 1 Class 2 substances failing to keep or falsifying required records failing to tech the required evacuation levels before opening a systems ...

EPA 608 CERTIFICATION LATEST ACTUAL EXAM 2024 VERSION 2 WITH 200 QUESTIONS AND CORRECT ANSWERS (100% CORRECT VERIFIED ANSWERS) Recovery equipment is certified by _________. - ANSWER-an EPA-approved laboratory The EPA defines this as maintenance, service, or repair that involves removal of the appliances compressor, condenser, evaporator, or auxiliary heat exchanger coil - ANSWER-Major maintenance When recovering refrigerant from small appliances, you must recover _________. - ANSWE...