Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

ESCO EPA Type III Practice Test: Questions and Answers for Low-Pressure Chiller Systems, Exams of Refrigeration and Air Conditioning

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

2024/2025

Available from 10/30/2024

Lectjoshua
Lectjoshua 🇺🇸

4.8

(6)

8.3K documents

1 / 3

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
ESCO EPA TYPE III PRACTICE TEST
QUESTIONS WITH CORRECT ANSWERS
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-15
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
- correct answer -25 mm of Hg absolute.
When charging a low-pressure system, refrigerant should be introduced to the system as a vapor to
raise the system's saturation temperature to a minimum of; - correct answer -36 degrees.
When installing more than one, pressure relief valves must be installed; - correct answer -in parallel with
each other.
pf3

Partial preview of the text

Download ESCO EPA Type III Practice Test: Questions and Answers for Low-Pressure Chiller Systems and more Exams Refrigeration and Air Conditioning in PDF only on Docsity!

ESCO EPA TYPE III PRACTICE TEST

QUESTIONS WITH CORRECT ANSWERS

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

  • correct answer -25 mm of Hg absolute. When charging a low-pressure system, refrigerant should be introduced to the system as a vapor to raise the system's saturation temperature to a minimum of; - correct answer -36 degrees. When installing more than one, pressure relief valves must be installed; - correct answer -in parallel with each other.

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)