ESCO Low GWP A2L Refrigerant Safety &
HVACR Concepts – Practice Questions with
Answers – Exam Preparation Material
Introduction:
This document covers essential concepts related to low GWP A2L
refrigerants, including safety procedures, regulatory requirements,
and HVACR system components. It includes structured practice
questions and precise answers on topics such as flammability
classifications, refrigerant properties, EPA regulations, and safe
handling practices.
The material is designed to support exam preparation and reinforce
key knowledge for technicians working with modern refrigerant
systems. It also reflects current industry transitions toward
environmentally friendly refrigerants and safety standards.
Exam Questions and Answers:
When charging a new A2L system, ___ _____ ______ & ____ __
______ must be recorded on a label affixed to the unit by the
installing technician. ---Correct precise answer---the total weight &
date of charge
Most, if not all, 2L refrigerants still fall under the jurisdiction of ---
Correct precise answer---EPA Section 608
,Refrigerant cylinders may be transported in the _______ position ---
Correct precise answer---upright/horizontal position
When working with refrigerant, flammable or non-flammable,
always refer the ______ for specific hazards and hazard mitigation
actions. ---Correct precise answer---Safety Data Sheets (SDS)
DOT regulations require refrigerant cylinders containing over 2.2
lbs of a 2L refrigerant to be equipped with a ______ _______ ______
instead of a rupture disc. ---Correct precise answer---Pressure
Relief Valve
OSHA requires that if flammable refrigerant cylinders are to be
stored in an enclosure, the enclosure is to be _______ and
__________. ---Correct precise answer---secured and ventilated
When servicing or installing equipment charged with a flammable
refirgerant, the job site should be evaluated for safety hazards,
such as possible ignition sources or the presence of flammable
vapors _____ __ _________ any work. ---Correct precise answer---
prior to beginning
, Specific applications and use limitations for the installation of A2L
equipment can be found in the _____________ __________. ---
Correct precise answer---manufacturers' literature
When working with a flammable refrigerant, recomended PPE can
be found in the ______ ____ ______. ---Correct precise answer---
Safety Data Sheets (SDS).
With proper ventilation on a jobsite or work area, flammable
refrigerants can be kept below their _____ ___________ ____ should
a leak occur. ---Correct precise answer---lower flammability limit
(LFL)
Accumulation of a flammable refrigerant in a combined space can
lead to a ______ ________ _____ or ____________. ---Correct
precise answer---severe ignition event or asphyxiation
Underwriters Laboratories' (UL) standards require that systems
charged with a flammable refrigerant have a label affixed to the
unit that is filled out by ___ __________ ____. ---Correct precise
answer---the installing tech
EPA Section 608 regulations require that if a system is charged
with a flammable refrigerant, the equipment must have ___
________ on the service and access valves which must extend at
HVACR Concepts – Practice Questions with
Answers – Exam Preparation Material
Introduction:
This document covers essential concepts related to low GWP A2L
refrigerants, including safety procedures, regulatory requirements,
and HVACR system components. It includes structured practice
questions and precise answers on topics such as flammability
classifications, refrigerant properties, EPA regulations, and safe
handling practices.
The material is designed to support exam preparation and reinforce
key knowledge for technicians working with modern refrigerant
systems. It also reflects current industry transitions toward
environmentally friendly refrigerants and safety standards.
Exam Questions and Answers:
When charging a new A2L system, ___ _____ ______ & ____ __
______ must be recorded on a label affixed to the unit by the
installing technician. ---Correct precise answer---the total weight &
date of charge
Most, if not all, 2L refrigerants still fall under the jurisdiction of ---
Correct precise answer---EPA Section 608
,Refrigerant cylinders may be transported in the _______ position ---
Correct precise answer---upright/horizontal position
When working with refrigerant, flammable or non-flammable,
always refer the ______ for specific hazards and hazard mitigation
actions. ---Correct precise answer---Safety Data Sheets (SDS)
DOT regulations require refrigerant cylinders containing over 2.2
lbs of a 2L refrigerant to be equipped with a ______ _______ ______
instead of a rupture disc. ---Correct precise answer---Pressure
Relief Valve
OSHA requires that if flammable refrigerant cylinders are to be
stored in an enclosure, the enclosure is to be _______ and
__________. ---Correct precise answer---secured and ventilated
When servicing or installing equipment charged with a flammable
refirgerant, the job site should be evaluated for safety hazards,
such as possible ignition sources or the presence of flammable
vapors _____ __ _________ any work. ---Correct precise answer---
prior to beginning
, Specific applications and use limitations for the installation of A2L
equipment can be found in the _____________ __________. ---
Correct precise answer---manufacturers' literature
When working with a flammable refrigerant, recomended PPE can
be found in the ______ ____ ______. ---Correct precise answer---
Safety Data Sheets (SDS).
With proper ventilation on a jobsite or work area, flammable
refrigerants can be kept below their _____ ___________ ____ should
a leak occur. ---Correct precise answer---lower flammability limit
(LFL)
Accumulation of a flammable refrigerant in a combined space can
lead to a ______ ________ _____ or ____________. ---Correct
precise answer---severe ignition event or asphyxiation
Underwriters Laboratories' (UL) standards require that systems
charged with a flammable refrigerant have a label affixed to the
unit that is filled out by ___ __________ ____. ---Correct precise
answer---the installing tech
EPA Section 608 regulations require that if a system is charged
with a flammable refrigerant, the equipment must have ___
________ on the service and access valves which must extend at
