EPA 608 Type III Study
To check for leaks in the water box (with water removed), place the probe ________.
A) at the outlet of the purge unit
B) around the vent valve
C) at the leak test plug
D) in the drain valve opening - answerD) in the drain valve opening
The owners and operators of any system that has 50 or more pounds of refrigerant charge must keep
records of refrigerant added, leak inspections, initial verification tests, and follow-up verification tests
for at least ________.
A) 2 years
B) 3 years
C) 5 years
D) 8 years or the life of the appliance, whichever is less - answerB) 3 years
Leak testing a low-pressure refrigeration system at pressures above 10 psig could damage the ________.
A) compressor
B) condenser
C) purge unit
D) rupture disc - answerD) rupture disc
After a leaking system that has been repaired has passed the initial verification leak test, when must the
follow-up verification test be conducted?
A) within 5 days
B) within 10 days
C) within 30 days
D) No follow-up verification test is required. - answerB) within 10 days
A hydrostatic tube test kit is used to ________.
A) find if there is a leak in the tube
B) flush water from tubes
C) expand replacement tubes into the chiller core
D) clean deposits from the water-side of the chiller - answerA) find if there is a leak in the tube
Water must be circulated through a chiller during refrigerant evacuation to avoid ________.
A) acid buildup
B) oil overheating
C) freezing of the water
D) system isothermalization - answerC) freezing of the water
, For a commercial refrigeration system with a charge of 50 pounds or more of refrigerant, a substantial
(or threshold) leak rate will be reduced to ________ after January 1, 2019.
A) 5%
B) 10%
C) 20%
D) 30% - answerC) 20%
When charging a low-pressure chiller with R-245ca, first introduce the refrigerant as a vapor until the
pressure is greater than 18 inches Hg vacuum to prevent ________.
A) the purge unit from venting excess refrigerant into the air
B) the purge unit from overheating
C) the chiller water from freezing
D) over-pressurization of the system and burst disk failure - answerC) the chiller water from freezing
ASHRAE Standard 15 calls for the activation of an alarm and mechanical ventilation when the ________.
A) TLV-TWA is exceeded
B) UTL (upper threshold limit) is exceeded
C) oxygen level drops below 16%
D) EEL (emergency exposure limit) is exceeded by 10% - answerA) TLV-TWA is exceeded
What is the Safety classification of R-123?
A) A1
B) A2
C) A2L
D) B1 - answerD) B1
The ________ is a common leak spot in systems with open-drive type compressors.
A) chiller endplate
B) rotating shaft seal on the compressor
C) service valve packing
D) pressure relief valve seat - answerB) rotating shaft seal on the compressor
When must the leak rate be calculated?
A) When topping off or recharging a system due to a loss of charge
B) When the system charge is more than 50 pounds
C) When you have topped off or changed the system at least twice in a calendar year
To check for leaks in the water box (with water removed), place the probe ________.
A) at the outlet of the purge unit
B) around the vent valve
C) at the leak test plug
D) in the drain valve opening - answerD) in the drain valve opening
The owners and operators of any system that has 50 or more pounds of refrigerant charge must keep
records of refrigerant added, leak inspections, initial verification tests, and follow-up verification tests
for at least ________.
A) 2 years
B) 3 years
C) 5 years
D) 8 years or the life of the appliance, whichever is less - answerB) 3 years
Leak testing a low-pressure refrigeration system at pressures above 10 psig could damage the ________.
A) compressor
B) condenser
C) purge unit
D) rupture disc - answerD) rupture disc
After a leaking system that has been repaired has passed the initial verification leak test, when must the
follow-up verification test be conducted?
A) within 5 days
B) within 10 days
C) within 30 days
D) No follow-up verification test is required. - answerB) within 10 days
A hydrostatic tube test kit is used to ________.
A) find if there is a leak in the tube
B) flush water from tubes
C) expand replacement tubes into the chiller core
D) clean deposits from the water-side of the chiller - answerA) find if there is a leak in the tube
Water must be circulated through a chiller during refrigerant evacuation to avoid ________.
A) acid buildup
B) oil overheating
C) freezing of the water
D) system isothermalization - answerC) freezing of the water
, For a commercial refrigeration system with a charge of 50 pounds or more of refrigerant, a substantial
(or threshold) leak rate will be reduced to ________ after January 1, 2019.
A) 5%
B) 10%
C) 20%
D) 30% - answerC) 20%
When charging a low-pressure chiller with R-245ca, first introduce the refrigerant as a vapor until the
pressure is greater than 18 inches Hg vacuum to prevent ________.
A) the purge unit from venting excess refrigerant into the air
B) the purge unit from overheating
C) the chiller water from freezing
D) over-pressurization of the system and burst disk failure - answerC) the chiller water from freezing
ASHRAE Standard 15 calls for the activation of an alarm and mechanical ventilation when the ________.
A) TLV-TWA is exceeded
B) UTL (upper threshold limit) is exceeded
C) oxygen level drops below 16%
D) EEL (emergency exposure limit) is exceeded by 10% - answerA) TLV-TWA is exceeded
What is the Safety classification of R-123?
A) A1
B) A2
C) A2L
D) B1 - answerD) B1
The ________ is a common leak spot in systems with open-drive type compressors.
A) chiller endplate
B) rotating shaft seal on the compressor
C) service valve packing
D) pressure relief valve seat - answerB) rotating shaft seal on the compressor
When must the leak rate be calculated?
A) When topping off or recharging a system due to a loss of charge
B) When the system charge is more than 50 pounds
C) When you have topped off or changed the system at least twice in a calendar year
