EPA TYPE III ACTUAL EXAM 2025 |LOW PRESSURE CHILLER|77 QUESTIONS
WITH VERIFIED ACCURATE SOLUTIONS
1. A low pressure chiller usually has a rupture disk set at
__________________________________________PSIG
8
10
12
15
2. If a technician discovers that air and noncondensables are
accumulating at the top of the condenser, what immediate
action should they take to
ensure the chiller operates efficiently?
Increase the refrigerant charge to compensate for the
loss of efficiency
Perform a leak check and evacuate the system to
remove the noncondensables
Adjust the expansion valve to increase
refrigerant flow Replace the condenser with
a new unit
3. The refrigerant R-134a belongs to the following
safety group. A2
, B1
A3
A1
4. During evacuation with large amounts of moisture it may
be necessary to increase pressure to counteract freezing
with a gas such as
R-
410A
R-22
, Air
Nitrogen
5. What is the purpose of introducing nitrogen during the
evacuation of systems with large amounts of water?
To increase the temperature of the system
To counteract freezing
To reduce the pressure in the system
To enhance the efficiency of the refrigerant
6. If a technician is charging a low-pressure chiller system
and the current saturation temperature is measured at 34
degrees, what should the technician do to ensure
compliance with safety standards?
Continue charging the system with liquid refrigerant.
Introduce vapor refrigerant until the saturation
temperature reaches at least 36 degrees.
Stop charging and check for leaks.
Evacuate the system completely before charging.
7. What is the minimum refrigerant charge weight that requires
the owner to maintain records of refrigerant added during
service and maintenance?
25 lbs.
30 lbs.
, 50 lbs.
75 lbs.
8. Explain why it is important for the owner to keep records of
refrigerant
added during service and maintenance for equipment with
charges of 50 lbs. or greater.
To comply with environmental regulations
WITH VERIFIED ACCURATE SOLUTIONS
1. A low pressure chiller usually has a rupture disk set at
__________________________________________PSIG
8
10
12
15
2. If a technician discovers that air and noncondensables are
accumulating at the top of the condenser, what immediate
action should they take to
ensure the chiller operates efficiently?
Increase the refrigerant charge to compensate for the
loss of efficiency
Perform a leak check and evacuate the system to
remove the noncondensables
Adjust the expansion valve to increase
refrigerant flow Replace the condenser with
a new unit
3. The refrigerant R-134a belongs to the following
safety group. A2
, B1
A3
A1
4. During evacuation with large amounts of moisture it may
be necessary to increase pressure to counteract freezing
with a gas such as
R-
410A
R-22
, Air
Nitrogen
5. What is the purpose of introducing nitrogen during the
evacuation of systems with large amounts of water?
To increase the temperature of the system
To counteract freezing
To reduce the pressure in the system
To enhance the efficiency of the refrigerant
6. If a technician is charging a low-pressure chiller system
and the current saturation temperature is measured at 34
degrees, what should the technician do to ensure
compliance with safety standards?
Continue charging the system with liquid refrigerant.
Introduce vapor refrigerant until the saturation
temperature reaches at least 36 degrees.
Stop charging and check for leaks.
Evacuate the system completely before charging.
7. What is the minimum refrigerant charge weight that requires
the owner to maintain records of refrigerant added during
service and maintenance?
25 lbs.
30 lbs.
, 50 lbs.
75 lbs.
8. Explain why it is important for the owner to keep records of
refrigerant
added during service and maintenance for equipment with
charges of 50 lbs. or greater.
To comply with environmental regulations
