1
EPA 608 TYPE 3 TEST ACTUAL EXAM 210
QUESTIONS AND CORRECT DETAILED
ANSWERS
On low pressure chillers, moisture typically enters the refrigerant system through
- (ANSWER)air leaks from areas with gaskets or fittings
The maximum test pressure for leak testing a low pressure centrifugal is: -
(ANSWER)10 psig
Leak test and repair the chiller to reduce refrigerant loss from a pruge unit on
CFC-11 chiller - (ANSWER)...
A hydrostatic tube test kit is used to: - (ANSWER)determine if a tube leaks
Commercial and industrial process refrigeration systems must be repaired when
the leak rate exceeds ____ of the charge per year. - (ANSWER)35%
Refrigerant recovery typically start with liquid recovery it is faster. - (ANSWER)...
A rupture disc on a recovery vessel for a low pressure refrigerants relieves at: -
(ANSWER)15 psig
, 2
According to ASHRAE Guideline 3-1996, if the pressure in a system rises from 1
mm Hg to a level above ____ during a standing vacuum test, the system should be
checked for leaks. - (ANSWER)2.5 mm Hg
The primary water source for a recovery unit condensing coil is _____. -
(ANSWER)local municipal water supply
When recharging a refrigeration system with R-11, what vaporpressure is
necessary in the shells before changing with liquid? - (ANSWER)16.9" Hg vacuum
After recovering the liquid refrigerant you must: - (ANSWER)recover the vapor
refrigerant
According to the EPA there is approximately _____ refrigerant vapor left in an
average 350 ton R-11 chiller at 0 psig pressure once all the R-11 liquid has been
removed. - (ANSWER)100 pounds
Charging refrigerant liquid into a refrigeration system when it is under a 29 inch
Hg vacuum can cause the: - (ANSWER)system water to freeze
A system does not have to be evacuated all the way to the required level when: -
(ANSWER)leaks in the appliance make evacuation to the prescribed level
unattainable
, 3
Which of the foloowing repairs would ALWAYS be considered "major" under EPA's
- (ANSWER)replacement of evaporator coil
Under EPA's regulation's _______ is used to pressurize a low pressure chiller for
the purpose of opening the system for a non major repair? - (ANSWER)warming
the refrigerant
If you are using a recovery machine manufactored AFTER 11-15-93 you must
evacuate an low pressure appliance to _______ before making a major repair. -
(ANSWER)25 mm of Hg absolute
After reaching the required recovery vacuum on a chiller, you should -
(ANSWER)Wait for at least a few minutes to see if the system pressure rises,
indicating that there is till refrigerant in a liquid form or in the oil
The pressure corresponding to 32 F for R-123 - (ANSWER)20 inches of HG vacuum
When evacuating a system the use of too large a vacuum pump can cause? -
(ANSWER)trapped water to freeze
Refrigerant-11 at a pressure of 17 inches HG vacuum has a saturation
temperature of: - (ANSWER)35F
EPA 608 TYPE 3 TEST ACTUAL EXAM 210
QUESTIONS AND CORRECT DETAILED
ANSWERS
On low pressure chillers, moisture typically enters the refrigerant system through
- (ANSWER)air leaks from areas with gaskets or fittings
The maximum test pressure for leak testing a low pressure centrifugal is: -
(ANSWER)10 psig
Leak test and repair the chiller to reduce refrigerant loss from a pruge unit on
CFC-11 chiller - (ANSWER)...
A hydrostatic tube test kit is used to: - (ANSWER)determine if a tube leaks
Commercial and industrial process refrigeration systems must be repaired when
the leak rate exceeds ____ of the charge per year. - (ANSWER)35%
Refrigerant recovery typically start with liquid recovery it is faster. - (ANSWER)...
A rupture disc on a recovery vessel for a low pressure refrigerants relieves at: -
(ANSWER)15 psig
, 2
According to ASHRAE Guideline 3-1996, if the pressure in a system rises from 1
mm Hg to a level above ____ during a standing vacuum test, the system should be
checked for leaks. - (ANSWER)2.5 mm Hg
The primary water source for a recovery unit condensing coil is _____. -
(ANSWER)local municipal water supply
When recharging a refrigeration system with R-11, what vaporpressure is
necessary in the shells before changing with liquid? - (ANSWER)16.9" Hg vacuum
After recovering the liquid refrigerant you must: - (ANSWER)recover the vapor
refrigerant
According to the EPA there is approximately _____ refrigerant vapor left in an
average 350 ton R-11 chiller at 0 psig pressure once all the R-11 liquid has been
removed. - (ANSWER)100 pounds
Charging refrigerant liquid into a refrigeration system when it is under a 29 inch
Hg vacuum can cause the: - (ANSWER)system water to freeze
A system does not have to be evacuated all the way to the required level when: -
(ANSWER)leaks in the appliance make evacuation to the prescribed level
unattainable
, 3
Which of the foloowing repairs would ALWAYS be considered "major" under EPA's
- (ANSWER)replacement of evaporator coil
Under EPA's regulation's _______ is used to pressurize a low pressure chiller for
the purpose of opening the system for a non major repair? - (ANSWER)warming
the refrigerant
If you are using a recovery machine manufactored AFTER 11-15-93 you must
evacuate an low pressure appliance to _______ before making a major repair. -
(ANSWER)25 mm of Hg absolute
After reaching the required recovery vacuum on a chiller, you should -
(ANSWER)Wait for at least a few minutes to see if the system pressure rises,
indicating that there is till refrigerant in a liquid form or in the oil
The pressure corresponding to 32 F for R-123 - (ANSWER)20 inches of HG vacuum
When evacuating a system the use of too large a vacuum pump can cause? -
(ANSWER)trapped water to freeze
Refrigerant-11 at a pressure of 17 inches HG vacuum has a saturation
temperature of: - (ANSWER)35F
