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25 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Vacuum lines hoses should be |
A. Orange in color for safety reasons B. as long as possible C. smaller than pump intake connection D. equal to or larger than pump intake connection |
Equal to or larger than pump intake |
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Refrigerant Vapors or Mist in high concentrations should not be inhaled since: |
A. They are addictive B. they may lower the body temperature C. They may cause heart irregularities or unconsciousness D. they may cause skin cancer |
They may cause heart irregularities or unconsciousness |
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Which of the following gases help form the Earth's protective shield |
A. Methane B. radon C. stratospheric ozone D. carbon dioxide |
Stratospheric ozone |
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Ozone depletion in the stratosphere is what type of problem |
A. Local B. Regional C. National D. global |
Global |
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A refrigerant cylinder that has a gray body and a yellow top indicates the cylinder is designed to hold |
A. Acetylene B. inert gas C. only refrigerant hcfc-123 D. recover refrigerant |
Recovered refrigerant |
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Hydro chlorofluorocarbons hcfc refrigerants contain |
A. Water chlorine fluorine and carbon B. water hydrogen chlorine carbon C. hydrogen chlorine fluorine and carbon D. hydrogen chlorine fluorine and water |
Water chlorine fluorine and carbon |
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An example of a CFC refrigerant |
A. R134a B. r123 C. R22 D. R12 |
R12 |
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Which of the following refrigerants has the lowest ozone depletion potential |
A. R22 B. r123 C. R134a D. r502 |
R134a |
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How to refrigerant cylinders be positioned when they are shipped |
A. Inverted B. upright C. horizontally D. stacked |
Upright |
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What is one of the most serious results of damage to the ozone layer |
A. Increase growth of marine plants B. increased volcanic activity C. increases in human cancer D. higher natural background radioactivity |
Increases in human cancer |
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Chlorine in the stratosphere is believed to come from really from CFCs rather than from natural sources such as volcanoes because |
A. The rise and the amount of chlorine measured in the stratosphere over the past two decades matches the rise in the amount of flourine which has different natural sources than chlorine over the same period B. the rise and the amount of chlorine measured in the Stratosphere over the past two decades matches the rise in cfc admissions over the same period C. samples of air taken from the stratosphere over erupting volcanoes show that the volcanoes contribute a small quantity of chlorine to the stratosphere compared to cfc's D. all the above |
All the Above |
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What is being done in the US to stop damage to the stratospheric ozone layer |
Using natural gas instead of coal to generate electricity B. capturing and ultimately eliminating use of chlorofluorocarbons C. enforcing strict emission requirements on incinerators D. all the above |
All the Above |
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Disposing of disposable cylinders is accomplished by |
A. Bleeding refrigerant to ambient air and throwing cylinders into a trash dumpster B. ensuring that all refrigerant is recovered and that the cylinders are rendered useless then recycling the metal C. refilling the cylinders a second time at an approved facility D. giving the cylinders away to your friends to use as air tanks |
Assuring that are refrigerant is recovered and that the cylinders are rendered useless then recycling the middle |
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Service technicians who violate the Clean Air Act provisions |
A. May be fined B. May lose certification C. may be required to appear in federal court D. all the above |
All the Above |
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CFCs will no longer be manufactured or imported in the US after |
A. 1994 B. 1995 C. 1996 D. 2000 |
1995 |
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Which refrigerants must be recovered before opening or disposing of appliances |
A. R12 B. R22 C. R500 D. all of the above |
All the Above |
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Under epa's regulations what standards must reclaimed refrigerant meet before it can be resold |
A. Ari 700 B. EPA 700 C. ashrae 700 D. Ul 700 |
ARI 700 |
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All devices used for refrigerant recovery must |
A. Be portable B. contain a heavy duty Shield C. have a 20000 BTU per hour rating D. meet EPA standards |
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The term used to describe the fact that a refrigerant blend has a range of boiling and condensing points at a constant pressure is |
A. Pressure slump B. mixture Glide C. fractionation D. temperature Glide |
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Which of the following is an approved drop in service replacement for R12 |
A. HFC 134a B. HFC 125 C. CFC 502 D. NONE OF THE ABOVE |
None of the above |
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A compound pressure gauge for the low side of the system measures pressure in |
A. Psia B. torrs and microns C. PSIG and inches of D. mercury to PSI and microns |
PSIG in inches of mercury |
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The state of the refrigerant entering the compressor of a refrigeration system is |
A. Low pressure liquid B. low-pressure Vapor C. high pressure liquid D. high pressure vapor |
Low-pressure vapor |
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Which process applies to cleaning refrigerant for immediate reuse buy a separation and single or multiple passes through devices like replaceable core filter driers which reduce moisture and acidity |
A. Recycling B. recovery C. reclaiming D. restoring |
Recycling |
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Which of the following Leak Detection methods is considered to be the most effective for locating the general area of a small leak |
A. Standing vacuum test B. electronic or ultrasonic tester C. halide torch D. out of sight |
Standing vacuum test |
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Well Servicing a system the technician discovers that some r502 was added to an R22 system the technician should |
A. Vent the refrigerant since it cannot be reclaimed B. recycle the refrigerant C. recover the refrigerant into a separate cover attack D. recover and use in another system |
Recover the refrigerant into a separate recovery time |
