EPA Section 608 Universal Master Practice Exam
(Types 1, 2, & 3) With Questions And Correct Verified
And | Expert Rationales (3 VERSIONS) GRADED A+
SECTION A: TYPE I — SMALL APPLIANCES
Question 1
What is the maximum quantity of factory-charged refrigerant
allowed in a system to classify it as a Type I small appliance under
EPA regulations?
A) 1 pound
B) 2 pounds
C) 5 pounds
D) 10 pounds
VERIFIED ANSWER: C) 5 pounds
EXPLANATION: The EPA defines a small appliance as any
system that is manufactured, charged, and hermetically
sealed in a factory containing 5 pounds or less of a regulated
refrigerant.
,Question 2
When using a system-dependent (passive) recovery process on a
small appliance with an inoperative compressor, the technician
must achieve what metrics?
A) 70% recovery or 0 psig
B) 80% recovery or 4 inches of Hg vacuum
C) 90% recovery or 10 inches of Hg vacuum
D) 100% recovery or 15 inches of Hg vacuum
VERIFIED ANSWER: B) 80% recovery or 4 inches of Hg vacuum
EXPLANATION: If the appliance's compressor is not running,
system-dependent recovery equipment must successfully
extract 80% of the refrigerant charge or pull the system
down to an internal vacuum of 4 inches of mercury (Hg).
Question 3
If a technician uses active (self-contained) recovery equipment on
a small appliance with a functional compressor, what is the
required evacuation level?
A) 0 psig
B) 4 inches of Hg vacuum
C) 10 inches of Hg vacuum
D) 15 inches of Hg vacuum
,VERIFIED ANSWER: C) 10 inches of Hg vacuum
EXPLANATION: Self-contained recovery equipment
manufactured after November 15, 1993, must be able to
evacuate small appliances to 10 inches of Hg vacuum if the
system compressor is operational.
Question 4
Which of the following refrigerants is a highly flammable
hydrocarbon (HC) permitted in modern domestic small appliances,
subject to strict weight limits?
A) R-22
B) R-134a
C) R-410A
D) R-600a
VERIFIED ANSWER: D) R-600a
EXPLANATION: R-600a (isobutane) is an A3 highly flammable
refrigerant that is approved for use in new household
refrigerators and small appliances, provided the charge does
not exceed safety weight limits.
, Question 5
What is the maximum allowable charge limit for hydrocarbon
refrigerants like R-200 or R-600a in a newly manufactured
domestic refrigerator?
A) 50 grams
B) 150 grams
C) 300 grams
D) 500 grams
VERIFIED ANSWER: B) 150 grams
EXPLANATION: To mitigate risks associated with flammability,
the EPA enforces a strict safety limit of 150 grams
(approximately 5.3 ounces) of hydrocarbon refrigerant in any
individual domestic small appliance.
Question 6
When installing a piercing valve onto a small appliance for
refrigerant recovery, the valve should always be leak-tested
before:
A) The recovery cylinder is weighed
B) The recovery process begins
C) The compressor is turned on
D) The system is scrapped
(Types 1, 2, & 3) With Questions And Correct Verified
And | Expert Rationales (3 VERSIONS) GRADED A+
SECTION A: TYPE I — SMALL APPLIANCES
Question 1
What is the maximum quantity of factory-charged refrigerant
allowed in a system to classify it as a Type I small appliance under
EPA regulations?
A) 1 pound
B) 2 pounds
C) 5 pounds
D) 10 pounds
VERIFIED ANSWER: C) 5 pounds
EXPLANATION: The EPA defines a small appliance as any
system that is manufactured, charged, and hermetically
sealed in a factory containing 5 pounds or less of a regulated
refrigerant.
,Question 2
When using a system-dependent (passive) recovery process on a
small appliance with an inoperative compressor, the technician
must achieve what metrics?
A) 70% recovery or 0 psig
B) 80% recovery or 4 inches of Hg vacuum
C) 90% recovery or 10 inches of Hg vacuum
D) 100% recovery or 15 inches of Hg vacuum
VERIFIED ANSWER: B) 80% recovery or 4 inches of Hg vacuum
EXPLANATION: If the appliance's compressor is not running,
system-dependent recovery equipment must successfully
extract 80% of the refrigerant charge or pull the system
down to an internal vacuum of 4 inches of mercury (Hg).
Question 3
If a technician uses active (self-contained) recovery equipment on
a small appliance with a functional compressor, what is the
required evacuation level?
A) 0 psig
B) 4 inches of Hg vacuum
C) 10 inches of Hg vacuum
D) 15 inches of Hg vacuum
,VERIFIED ANSWER: C) 10 inches of Hg vacuum
EXPLANATION: Self-contained recovery equipment
manufactured after November 15, 1993, must be able to
evacuate small appliances to 10 inches of Hg vacuum if the
system compressor is operational.
Question 4
Which of the following refrigerants is a highly flammable
hydrocarbon (HC) permitted in modern domestic small appliances,
subject to strict weight limits?
A) R-22
B) R-134a
C) R-410A
D) R-600a
VERIFIED ANSWER: D) R-600a
EXPLANATION: R-600a (isobutane) is an A3 highly flammable
refrigerant that is approved for use in new household
refrigerators and small appliances, provided the charge does
not exceed safety weight limits.
, Question 5
What is the maximum allowable charge limit for hydrocarbon
refrigerants like R-200 or R-600a in a newly manufactured
domestic refrigerator?
A) 50 grams
B) 150 grams
C) 300 grams
D) 500 grams
VERIFIED ANSWER: B) 150 grams
EXPLANATION: To mitigate risks associated with flammability,
the EPA enforces a strict safety limit of 150 grams
(approximately 5.3 ounces) of hydrocarbon refrigerant in any
individual domestic small appliance.
Question 6
When installing a piercing valve onto a small appliance for
refrigerant recovery, the valve should always be leak-tested
before:
A) The recovery cylinder is weighed
B) The recovery process begins
C) The compressor is turned on
D) The system is scrapped
