EPA Certification Exam – Questions With A+ Solutions
When operating recycling or recovery equipment and handling recovery
cylinders wear _______ and _________ Right Ans - Bury-lined gloves , safety
glasses
The flammability and toxicity refrigerants group A Right Ans - Low toxicity
The flammability and toxicity refrigerants
Group b Right Ans - High toxicity
Hcfc-123 Right Ans - B1 high toxicity
High concentrations of refrigerant should not be inhaled since it may cause
what ? Right Ans - Heart irregularities or asphyxia
When recovering of disposable cylinders, any remaining refrigerants need to
be recovered using what ? Right Ans - A recovery machine
The container must be evacuated to at least _____ Psig Right Ans - 0
Recovery cylinders must be approved by ? Right Ans - Dot
Pressure exerted by the fluid at equilibrium at a given point within the fluid.
Right Ans - Hydrostatic pressure
Refrigerant cylinders should never be filled above _____ % Right Ans - 80
Filling limit devices vary from one machine to another , some of which include
float switches, ______________ _______ ___________, and weighing scales Right Ans
- Thermistor type sensors
Recovery cylinders should be tested at least 1 every _____. Years . Right Ans
-5
A gas that is found in both the stratosphere and troposphere is ? Right Ans
- Ozone
, Ozone is a form of oxygen gas whose molecules consist of ___ __________ _________
Right Ans - 3 oxygen atoms
Proof that chlorine atoms have reached the stratosphere can be found by ?
Right Ans - High altitude air sampling
CFC Right Ans - Chlorofluorocarbons
HCFC Right Ans - Hydrochlorofluorocarbons ( hydrogen, chlorine, fluorine,
and carbon)
Most commonly used refrigerants ? Right Ans - HCFC-123 and HCFC-22
The ability of any chemical to deplete the ozone layer is called _________ _______
_________ Right Ans - Ozone depletion potential (ODP)
_________ has 20 times the ozone depleting potential of HCFC-22 Right Ans -
CFCs
CFCs are R-___ , R-____, R-____,R-_____, R-_____, and R-______ Right Ans - R-11,
R-12, R-113, R-114, R-500 , R-502
HCFCs are R-____, R-_____ Right Ans - R-22, R-123
HFC R-____ Right Ans - R-134a
A mixture of 2 or more refrigerants where the mixture behaves like a single
new refrigerant is ? Right Ans - Azeotropes
The ODP of HFC-134a is ____ Right Ans - 0
Two types of recovery systems Right Ans - Passive and active
(System dependent) uses the internal pressure of the system or the systems
compressor to aid in the refrigerant recovery process. Right Ans - Passive
(Self contained) is the method used by the tech to remove refrigerants
through the use of certified self-contained recovery machine Right Ans -
Active
When operating recycling or recovery equipment and handling recovery
cylinders wear _______ and _________ Right Ans - Bury-lined gloves , safety
glasses
The flammability and toxicity refrigerants group A Right Ans - Low toxicity
The flammability and toxicity refrigerants
Group b Right Ans - High toxicity
Hcfc-123 Right Ans - B1 high toxicity
High concentrations of refrigerant should not be inhaled since it may cause
what ? Right Ans - Heart irregularities or asphyxia
When recovering of disposable cylinders, any remaining refrigerants need to
be recovered using what ? Right Ans - A recovery machine
The container must be evacuated to at least _____ Psig Right Ans - 0
Recovery cylinders must be approved by ? Right Ans - Dot
Pressure exerted by the fluid at equilibrium at a given point within the fluid.
Right Ans - Hydrostatic pressure
Refrigerant cylinders should never be filled above _____ % Right Ans - 80
Filling limit devices vary from one machine to another , some of which include
float switches, ______________ _______ ___________, and weighing scales Right Ans
- Thermistor type sensors
Recovery cylinders should be tested at least 1 every _____. Years . Right Ans
-5
A gas that is found in both the stratosphere and troposphere is ? Right Ans
- Ozone
, Ozone is a form of oxygen gas whose molecules consist of ___ __________ _________
Right Ans - 3 oxygen atoms
Proof that chlorine atoms have reached the stratosphere can be found by ?
Right Ans - High altitude air sampling
CFC Right Ans - Chlorofluorocarbons
HCFC Right Ans - Hydrochlorofluorocarbons ( hydrogen, chlorine, fluorine,
and carbon)
Most commonly used refrigerants ? Right Ans - HCFC-123 and HCFC-22
The ability of any chemical to deplete the ozone layer is called _________ _______
_________ Right Ans - Ozone depletion potential (ODP)
_________ has 20 times the ozone depleting potential of HCFC-22 Right Ans -
CFCs
CFCs are R-___ , R-____, R-____,R-_____, R-_____, and R-______ Right Ans - R-11,
R-12, R-113, R-114, R-500 , R-502
HCFCs are R-____, R-_____ Right Ans - R-22, R-123
HFC R-____ Right Ans - R-134a
A mixture of 2 or more refrigerants where the mixture behaves like a single
new refrigerant is ? Right Ans - Azeotropes
The ODP of HFC-134a is ____ Right Ans - 0
Two types of recovery systems Right Ans - Passive and active
(System dependent) uses the internal pressure of the system or the systems
compressor to aid in the refrigerant recovery process. Right Ans - Passive
(Self contained) is the method used by the tech to remove refrigerants
through the use of certified self-contained recovery machine Right Ans -
Active
