CFC Core Exam Questions and Answers 100% Correct
__are fluorocarbon refrigerants that cause no harm to stratospheric ozone.
A.CFCS
B.HCFCS
C.HFCs
D.HalonsTM - ANSWER-C
2.The Clean Air Act_.
A.calls for the phaseout of PFC refrigerant production
B.requires that all leaks be fixed within 30 days
C.requires OSHA to set standards for the recovery of refrigerants prior to appliance disposal
D.prohibits CFC/HCFC venting as of July 1,1992 - ANSWER-D
3.Refrigerant__is the type of contamination that is the most difficult for a reclaiming facility to
eliminate.
A.with air
B.with moisture
C.from an acid burnout
D.containing particulate contaminants - ANSWER-C
__is a CFC refrigerant.
A.R-134a
B.R-123
C.R-22
D.R-12 - ANSWER-D
_is an HCFC refrigerant.
A.R-11
B.R-22
C.R-114
D.R-717 - ANSWER-B
__is an HFC refrigerant.
A.R-134a
B.R-115
C.R-22
D.R-11 - ANSWER-A
The strongest evidence that CFCs are in the stratosphere is_.
A.theory only B.measurements of CFCs in air samples from the lower atmosphere
C.measurements of CFCs in air samples from the stratosphere
D.measurements of other man-made compounds in air samples from the stratosphere - ANSWER-C
Ozone depletion in the stratosphere is a__problem.
A.local
B.regional
C.national
D.global - ANSWER-D
The ozone layer protects the planet's surface from_.
A.losing oxygen
B.chlorine monoxide
C.UV radiation
D.hydrogen chloride - ANSWER-C
One of the most serious results of damage to the ozone layer is.
A.increased growth of marine plants
B.increased volcanic activity
C.increases in human skin cancer
D.higher natural background radioactivity - ANSWER-C
The size(capacity)of a vacuum pump and suction line size determine
A.vacuum polarity
B.evacuation time
C.refrigerant used
D.oil viscosity - ANSWER-B
__is the element in refrigerants that causes ozone depletion.
A.Fluorine
B.Chlorine
C.Carbon
D.Hydrogen - ANSWER-B
Some state and local governments may establish laws that_.
A.counteract EPA regulations
B.are not as strict as the Clean Air Act and EPA regulations
C.contain stricter regulations than the Clean Air Act and EPA regulations
D.supersede EPA regulations - ANSWER-D
Whenever dry nitrogen from a portable cylinder is used in service and installation practice,the
most important safety consideration is that.
A.the regulator has a new set of gauges
B.the gauges are clean C.a relief valve is inserted in the downstream line from the pressure regulator
D.no refrigerant lines can leak - ANSWER-C
Personal protective equipment(gloves,safety glasses,safety shoes,etc.)must be wom when.
A.reporting for work
B.handling and filling refrigerant cylinders
C.climbing ladders
D.lifting - ANSWER-B
__is a chlorine-free refrigerant.
A.HFC-134a
B.CFC-2
C.HCFC-22
D.HCFC-124 - ANSWER-A
When leak checking a unit that has lost a complete charge,__is/are the gas(es)that would
cause the least damage to the environment.
A.dry nitrogen and R-22
B.compressed air and R-12
C.dry nitrogen
D.dry nitrogen and R-12 - ANSWER-C
When evacuating a system,the use of a large vacuum pump could cause_to freeze.
A.trapped oil
B.trapped refrigerant
C.trapped water
D.valves - ANSWER-C
In order to verify the allowable refrigeration system test pressure,check
A.with the equipment owner or representative
B.refrigerant pressure tables
C.the design pressure on the equipment nameplate
D.with the local utility company - ANSWER-C
To determine the safe pressure for leak testing a system,a technician should use_.
A.low-side test-pressure data-plate value
B.discharge operating pressure
C.ambient+300temperature/pressure value
D.ambient at standby condition - ANSWER-A
__is a gas that helps form a protective shield around the Earth.
A.Methane
B.Radon
C.Stratospheric ozone
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