EPA 608 TYPE III EXPECTED QUESTIONS WITH
VERIFIED ANSWERS
Question 1.
What steps may be taken to prevent air accumulation into an idle low pressure refrigeration system?
a) Leave the purge unit on-line at all times.
b) System pressure should be maintained slightly above atmospheric.
c) Open the air vents on the condenser.
d) Intermittently operate the system with no load.
ANSWER
b) System pressure should be maintained slightly above atmospheric.
Question 2.
If you suspect a leak in the water box of a chiller, you should place the leak detector probe _________,
and sniff for refrigerants.
a) at the rupture disc
b) through the vent valve
c) through a test plug
d) through a drain valve
ANSWER
d) through a drain valve
Question 3.
What refrigerant(s) require an equipment room refrigeration sensor (as per ASHRAE Standard 15)?
1) R-12
2) R-134a
3) R-123
4) none of the above
5) all of the above
6) only 2 and 3
ANSWER
3) R-123
,Question 4.
According to ASHRAE Guideline 3-1996, if the pressure in a system rises from 1 mm Hg to above
__________ during a standard vacuum test, the system should be checked for leaks.
1) 1.5 mm Hg
2) 2.2 mm HG
3) 2.5 mm Hg
4) 0.5 mm Hg
ANSWER
3) 2.5 mm Hg
Question 5.
Under what code group of ASHRAE Standard 34 does R-123 fall?
1) A1
2) A2
3) B1
4) G2
5) B2
6) B123
ANSWER
3) B1
Question 6.
A hydrostatic tube test kit is used to: _________.
a) blow all water from the tubes
b) remove any water from the machine
c) vent refrigerant
d) determine if a tube leaks
ANSWER
d) determine if a tube leaks
,Question 7.
If you are using a water-cooled recovery unit, __________ is the primary water source for the recovery
unit's condensing coil.
1) chilled water
2) condenser water
3) local municipal water supply
4) de-ionized water
5) bottled water
ANSWER
3) local municipal water supply
Question 8.
What refrigerant(s) require an equipment room oxygen deprivation sensor (as per ASHRAE Standard
15)?
1) R-12
2) R-134a
3) R-11
4) none of the above
5) all of the above
6) only 2 and 3
ANSWER
5) all of the above
Question 9.
A system does not have to be evacuated all the way to the required level when: __________.
a) the repair is major
b) the repair is followed by an evacuation of the appliance to the environment
c) the appliance is being disposed of
d) leaks in the appliance make evacuation to the prescribed level unattainable
ANSWER
d) leaks in the appliance make evacuation to the prescribed level unattainable
, Question 10.
Which repair is a "major" repair under EPA's regulations?
1) Replacement of an evaporator coil.
2) Replacement of a filter-drier greater than 8 cubic inches,
3) Replacement of a run or start capacitor.
4) Replacement of a fan or water pump motor.
ANSWER
1) Replacement of an evaporator coil.
Question 11.
The PRIMARY purpose of a purge unit on a CFC-11 chiller is to: ___________.
a) remove CFCs from the system
b) condense air out of the system
c) condense water out of the system
d) remove non-condensables from the system
ANSWER
d) remove non-condensables from the system
Question 12.
After reaching the required recovery vacuum on an appliance, you should _________.
1) immediately disconnect the recycling or recovery equipment and open the system for service
2) wait for at least a few minutes to see if the system pressure rises, indicating that there is still
refrigerant in liquid form or in the oil
3) immediately break the vacuum with nitrogen and open the system for service
4) immediately pressurize the system with nitrogen and perform a leak check
ANSWER
2) wait for at least a few minutes to see if the system pressure rises, indicating that there is
still refrigerant in liquid form or in the oil
VERIFIED ANSWERS
Question 1.
What steps may be taken to prevent air accumulation into an idle low pressure refrigeration system?
a) Leave the purge unit on-line at all times.
b) System pressure should be maintained slightly above atmospheric.
c) Open the air vents on the condenser.
d) Intermittently operate the system with no load.
ANSWER
b) System pressure should be maintained slightly above atmospheric.
Question 2.
If you suspect a leak in the water box of a chiller, you should place the leak detector probe _________,
and sniff for refrigerants.
a) at the rupture disc
b) through the vent valve
c) through a test plug
d) through a drain valve
ANSWER
d) through a drain valve
Question 3.
What refrigerant(s) require an equipment room refrigeration sensor (as per ASHRAE Standard 15)?
1) R-12
2) R-134a
3) R-123
4) none of the above
5) all of the above
6) only 2 and 3
ANSWER
3) R-123
,Question 4.
According to ASHRAE Guideline 3-1996, if the pressure in a system rises from 1 mm Hg to above
__________ during a standard vacuum test, the system should be checked for leaks.
1) 1.5 mm Hg
2) 2.2 mm HG
3) 2.5 mm Hg
4) 0.5 mm Hg
ANSWER
3) 2.5 mm Hg
Question 5.
Under what code group of ASHRAE Standard 34 does R-123 fall?
1) A1
2) A2
3) B1
4) G2
5) B2
6) B123
ANSWER
3) B1
Question 6.
A hydrostatic tube test kit is used to: _________.
a) blow all water from the tubes
b) remove any water from the machine
c) vent refrigerant
d) determine if a tube leaks
ANSWER
d) determine if a tube leaks
,Question 7.
If you are using a water-cooled recovery unit, __________ is the primary water source for the recovery
unit's condensing coil.
1) chilled water
2) condenser water
3) local municipal water supply
4) de-ionized water
5) bottled water
ANSWER
3) local municipal water supply
Question 8.
What refrigerant(s) require an equipment room oxygen deprivation sensor (as per ASHRAE Standard
15)?
1) R-12
2) R-134a
3) R-11
4) none of the above
5) all of the above
6) only 2 and 3
ANSWER
5) all of the above
Question 9.
A system does not have to be evacuated all the way to the required level when: __________.
a) the repair is major
b) the repair is followed by an evacuation of the appliance to the environment
c) the appliance is being disposed of
d) leaks in the appliance make evacuation to the prescribed level unattainable
ANSWER
d) leaks in the appliance make evacuation to the prescribed level unattainable
, Question 10.
Which repair is a "major" repair under EPA's regulations?
1) Replacement of an evaporator coil.
2) Replacement of a filter-drier greater than 8 cubic inches,
3) Replacement of a run or start capacitor.
4) Replacement of a fan or water pump motor.
ANSWER
1) Replacement of an evaporator coil.
Question 11.
The PRIMARY purpose of a purge unit on a CFC-11 chiller is to: ___________.
a) remove CFCs from the system
b) condense air out of the system
c) condense water out of the system
d) remove non-condensables from the system
ANSWER
d) remove non-condensables from the system
Question 12.
After reaching the required recovery vacuum on an appliance, you should _________.
1) immediately disconnect the recycling or recovery equipment and open the system for service
2) wait for at least a few minutes to see if the system pressure rises, indicating that there is still
refrigerant in liquid form or in the oil
3) immediately break the vacuum with nitrogen and open the system for service
4) immediately pressurize the system with nitrogen and perform a leak check
ANSWER
2) wait for at least a few minutes to see if the system pressure rises, indicating that there is
still refrigerant in liquid form or in the oil
