WorksheetsEPA and Refrigerants
Total questions: 35
Worksheet time: 26mins
Which of the following refrigerants are phased-out due to Montreal protocol on ozone layer depletion-
R11
R21
R12
R32
The ozone layer filters out most of the sun’s harmful
Infrared Radiation
Ultraviolet Radiation
Gamma Radiation
Alpha Radiation
The reduction of ozone in the stratosphere could cause
An increase in skin cancer and eye cataracts.
An increase in plant life growth
An increase in the earth’s polar ice
An increase in marine life growth
If the required charge level of refrigerant for and MVAC system is 40 ounces, which of these is the correct charge level measured in pounds?
1.75lb
4.50lb
3.75lb
2.50lb
Which of the following refrigerants is a CFC-type refrigerant?
R-22
R-123
R-134a
R-12
Which of the following refrigerants is considered an HFC-type of refrigerant?
R-134a
R-12
R-22
R-11
Which type of refrigerant has the highest Ozone Depletion Potential (ODP)?
HFC
HCFC
CFC
All have the same ODP.
The abbreviation for refrigerants containing chlorine, fluorine, carbon, and hydrogen is ____.
HFC
HCFC
CFC
HFAC
To remove the refrigerant from a system without any testing or processing and to be put back into the same system is called ____.
recovery
renew
reclaim
recycle
Refrigerants that are made up of two refrigerants that, when blended in the right proportions, combine to make a third stable refrigerant, are called ____.
blends
azeotropes
near azeotropes
mixtures
The DOT-approved cylinder used for recovering refrigerant is _________.
gray top yellow bottom
gray bottom white top
gray bottom yellow top
gray and yellow striped
over-evacuation of a system:
causes the tubes to collapse
damages the vacuum gauges
causes vacuum pump damage
does not occur
The state of the refrigerant entering the compressor is?
low pressure liquid
low pressure vapor
high pressure liquid
high pressure vapor
The component responsible for absorbing heat and changing liquid refrigerant to a vapor.
Evap.
Cond.
Comp.
Metering Device.
State of the refrigerant leaving the cond. coil
HPHT vapor
LPLT vapor
HPHT liquid
LPLT liquid
Device that restricts the flow of refrigerant based on the temperature of the refrigerant leaving the evap coil.
AXV
TXV
Capillary Tube
Piston
What will happen to a system with a blocked return air filter?
The evap. coil will freeze
The refrigerant won't be cooled in the condenser coil.
The metering device will become restricted
Nothing, the system will work fine.
What will happen to a system with a bad cond. fan?
The compressor will freeze
The system will work properly just have to work harder.
The refrigerant will not change state from a vapor to a liquid
The refrigerant will not change from a liquid to a vapor.
The line between the condenser coil and metering device is known as:
Suction Line
Water Line
Discharge Line
Liquid Line
The state of the refrigerant in the suction line?
LPLT Liquid
LPLT Vapor
HPHT Liquid
HPHT vapor
What is this?
Recovery Cylinder
Refrigerant bottle
Air tank
Expansion tank
What is this?
Vacuum Pump
Check valve
Recovery machine
Air compressor
What is atmospheric pressure?
