

Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
A series of questions and answers related to the epa type iii certification for low-pressure chiller systems. It covers topics such as refrigerant recovery, leak detection, system pressurization, and safety standards. Useful for individuals preparing for the type iii certification exam or those seeking to understand the practical aspects of low-pressure chiller maintenance and repair.
Typology: Exams
1 / 3
This page cannot be seen from the preview
Don't miss anything!
To repair a chiller operating with R-22, the technician; - correct answer -must have a Type II certification. What can be used to pressurize a chiller system before opening the system for a non-major repair? - correct answer -Controlled hot water A low-pressure chiller used for comfort cooling must be repaired if it has an annual leak rate of ____ of the total charge. - correct answer -10 percent When pressurizing a low-pressure system for leak-detection purposes, do not exceed - correct answer - 10 psig Which of the following best describes the refrigerant recovery process from an R-123 system? - correct answer -Start with liquid removal and then switch over to vapor recovery. The Standard for machine room safety is; - correct answer -ASHRAE- The owner must keep records of refrigerant added to a low-pressure system during service and maintenance if the system charge is; - correct answer -50 pounds or greater. The EPA-required evacuation level for recovery or recycling equipment used on low-pressure systems is
Because a low-pressure system operates below atmospheric pressure (in a vacuum), - correct answer - leaks in gaskets or fittings will cause air and moisture to enter the system. What type of equipment can be worked on with Type III certification? - correct answer -Low-pressure The most efficient method of leak checking a charged low-pressure refrigeration unit is to; - correct answer -pressurize the system using controlled hot water or heater blankets. After all the liquid has been removed from an average 350-ton, low-pressure appliance, approximately how much vapor refrigerant remains in the system? - correct answer -100 pounds Under ASHRAE Standard 34, R-134a is classified as; - correct answer -A The rupture disk on a low-pressure chiller has a burst pressure of; - correct answer -15 psig In a low-pressure chiller, air and other non-condensables collect at the; - correct answer -top section of the condenser. Where is refrigerant added to a low-pressure system during the charging process? - correct answer -The lowest access point on the system such as the evaporator charging valve. When leak testing a low-pressure chiller, the maximum pressure to use is; - correct answer -10 psig. If a strong odor is detected during the recovery process, - correct answer -a compressor burn-out may have occurred. Where is the purge unit located in a low-pressure system? - correct answer -The top of the condenser. Which of the following refrigerants has a safety classification of B-1 - correct answer -HCFC-123 (R-123)