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EPA 608 TYPE 3 TEST ACTUAL EXAM
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EPA 608 TYPE 3 TEST ACTUAL EXAM
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EPA 608 TYPE 3 TEST ACTUAL EXAMIdentify the pressure corresponding to 32 degrees F for R-123: ________.
a) 23 inches of Hg vacuum
b) 20 inches of Hg vacuum
c) 17 inches of Hg vacuum
d) 11 inches of Hg vacuum - ANSWER: b) 20 inches of Hg vacuum
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
Excessive running of a purge system on a low pressure chiller generally indicates that
the: ___________.
a) air sensors are faulty
b) ambient temperature is too high
c) efficiency of the purge unit is too low
d) system is leaking - ANSWER: d) system is leaking
When recovering vapor from a low pressure refrigeration system: __________.
a) water pumps should all be on, and the recovery compressor should be off
b) system water pumps should be on, the recovery compressor should be on, and
the recovery condenser water should be off
c) the systems water pumps, the recovery compressor, and the recovery condenser
water should all be on
d) system water pumps should be off, and the recovery compressor should be on -
ANSWER: c) the systems water pumps, the recovery compressor, and the recovery
condenser water should all be on
ASHRAE Standard 15 - 1994 requires equipment room refrigerant sensors for what
safety group classifications?
a) A1
b) B2
c) A2
d) All refrigerant safety group classifications. - ANSWER: d) All refrigerant safety
group classifications
If you are using a recovery machine manufactured BEFORE November 15, 1993, you
must evacuate any low-pressure appliance to _______ before making a major repair.
,a) 0 psig
b) 15 inches of Hg vacuum
c) 25 inches of Hg vacuum
d) 25mm of Hg absolute - ANSWER: c) 25 inches of Hg vacuum
A rupture disc on a recovery vessel for low pressure refrigerants relieves at:
________.
a) 5 psig
b) 10 psig
c) 15 psig
d) 20 psig - ANSWER: c) 15 psig
The primary water source for a recovery unit condensing coil is: _________.
a) chilled water
b) condenser water
c) local municipal water supply
d) de-ionized water - ANSWER: c) local municipal water supply
Which of the following repairs that would ALWAYS be considered "major" under
EPA's regulations?
a) replacement of an evaporator coil
b) replacement of a filter-drier
c) replacement of a switch
d) replacement of a purge unit - ANSWER: a) replacement of an evaporator coil
According to the EPA, there is approximately ________ of refrigerant vapor left in an
average 350 ton R-11 chiller at 0 psig pressure once all the R-11 liquid has been
removed.
a) None.
b) 10 pounds.
c) 20 pounds.
d) 100 pounds. - ANSWER: d) 100 pounds.
A centrifugal chiller's rupture disk is connected to the chiller's: ________.
a) condenser
b) evaporator
c) liquid line
d) economizer - ANSWER: b) evaporator
When charging a chiller, refrigerant vapor is introduced into the system before
charging with liquid. That is because: ___________.
, a) vapor charging increases pressure slowly, preventing failure of the rupture disc
b) vapor charging is faster than liquid charging
c) liquid charging is more difficult to control than vapor charging
d) liquid charged into a deep vacuum will cause the refrigerant to boil and lower
temperatures enough to freeze the water in the tubes - ANSWER: d) liquid charged
into a deep vacuum will cause the refrigerant to boil and lower temperatures
enough to freeze the water in the tubes
To determine how much vapor to charge into an evacuated chiller, you should
charge with vapor until: __________.
a) the system pressure corresponds to a refrigerant saturation temperature of 36
degrees F
b) the recovery unit liquid level drops
c) you have charged with vapor for 15 minutes
d) the recovery unit pressure drops - ANSWER: a) the system pressure corresponds
to a refrigerant saturation temperature of 36 degrees F
When there is excessive moisture collecting in the purge unit of a low pressure
refrigeration system, this indicates that: _________.
a) the system was charged with contaminated refrigerant
b) the condenser or chiller barrel tubes are leaking
c) the purge unit is not operating properly
d) the purge unit needs adjustment - ANSWER: b) the condenser or chiller barrel
tubes are leaking
During chiller evacuation, water is circulated to: _________.
a) speed up the recovery process
b) prevent loss of refrigerant to the atmosphere
c) prevent freezing of the water
d) maintain constant refrigerant pressure - ANSWER: c) prevent freezing of the water
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
What is meant by the term "high efficiency purge unit"?
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