Type II Flashcards
In a high-pressure system, one indicator that there is a leak in the system is ______.
Excessive superheat
Which component of a large open-type compressor is most likely to leak if the unit has not been operated in more than 2 months?
Rotating shaft seal
-operating the unit for a short time every month will help prevent leaking.
When you have no other choice but to use a refrigerant trace has, which refrigerant should be used for leak detection?
R-22
HCFC 22 has only a small percentage of ozone destroying chemical.
This mixture should only be used in small amounts along with nitrogen.
What is the first thing that should be done when a new air conditioning system has first been assembled and is ready for testing?
Pressurize the system with nitrogen and perform a leak test.
Mixture of ________ that are used as holding charges or as leak test gases are not subject to the July 1, 1992 prohibition.
Nitrogen and R-22
Which of the following statements is true of recovery and recycling equipment manufactured after November 15, 1993
A. It must meet stricter vacuum standards than those met by equipment manufactured before Nov. 15, 1993
B. It must be tested by an EPA-approved third party.
C. It must be equipped with low-loss fittings.
D. All of the above
All of the above
The EPA is authorized to pay awards of up to ________ to any person who furnishes info that leads to a criminal conviction of another person for violation of the Clean Air Act.
$10,000
Hydrochlorofluorocarbon (HCFC) refrigerant contain ________.
Hydrogen, chlorine, fluorine and carbon
HFC contain ________.
Hydrogen, fluorine, carbon
R-134a is an example of a HFC
HFC fluorocarbon refrigerants cause no harm to the stratospheric ozone, they have ______.
Zero ODP
_______ is the result of damage to the Earths ozone layer?
A. Skin cancers
B. Cataracts
C. Reduced crop yields
D. All three
All three
The existence of _______ in the upper stratosphere indicates that the ozone layer is being destroyed.
Chlorine monoxide
Since what date has it been illegal to knowingly release CFC and HCFC refrigerants during the service, maintenance, repair or disposal of appliances,
July 1, 1992
Which refrigerant is it illegal to knowingly release during the service, maintenance, repair and disposal of appliances?
HFC, CFC, HCFC (all 3 have been illegal to dispose of since Nov. 15, 1995)
The equipment covered by EPA regulations includes all A/C and refrigeration equipment containing and using ________ refrigerants.
CFC, HFC, HCFC and any other toxics.
