Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
|
Which refrigerants contain the most Chlorine? A. HCFC B. HFC C. CFC D. Ammonia |
C. CFC |
|
|
As of what date did it become unlawful to intentionally release class one and class two refrigerants to the atmosphere? A. July 1, 1992 B. July 1, 1993 C. November 14, 1994 D. January 1, 1996 |
A. July 1, 1992 |
|
|
Which refrigerants have the lowest ozone depletion potential (OPD)? A. CFC B. HCFC C. HFC D. Temary blends of HCFC |
C. HFC |
|
|
The molecule found in CFC and HCFC refrigerants that destroys ozone in the Stratosphear is A. Fluorine B. Carbon C. Hydrogen D. Chlorine |
D. Chlorine |
|
|
Stratospheric ozone consists of A. One oxygen atom B. Two oxygen adams C. Three oxygen adams D. Four oxygen adams |
C. Three oxygen atoms |
|
|
Stratospheric ozone depletion a _________ problem A. American B. Global C. Local D. United nations |
B. Global |
|
|
The gas in the stratosphere that protects us from ultraviolet radiation is A. Radon B. Sulfur dioxide C. Carbon dioxide D. ozone |
D. Ozone |
|
|
Which refrigerant is a CFC A. R-134a B. R-123 C. R-22 D. R-12 |
D. R-12 (R11, R500, R502) |
|
|
Which refrigerant is a HCFC A. R-134a B. R-123 C. R-22 D. B and C above |
D. B and C above |
|
|
Which refrigerant is an HFC A. R-134a B. R-123 C. R-22 D. R-12 |
A. R-134a |
|
|
Which refrigerant contains no chlorine A. R-134aB. R-123C. R-22 |
A. R-134a |
|
|
The molecule found in the stratosphere that indicates stratospheric ozone depletion is taking place is A. Carbon dioxide B. Carbon monoxide C. Chlorine monoxide D. Radon |
C. Chlorine monoxide |
|
|
The following actions would violate in the clean air act (CAA) A. Knowingly releasing class one and class two substances B. Failing to keep or falsifying required records C. Failing to reach the required evacuation levels before opening a system to the atmosphere for service D. All of the above |
D. All of the above |
|
|
One time (disposable) refrigerant cylinders are used for A. Sending refrigerant for reclaim B. Containing recovered refrigerant C. Recycling refrigerant D. Virgin refrigerant |
D. Virgin refrigerant |
|
|
The rule of thumb for refilling approve cylinders is a maximum of _______ percent liquid A. 60% B. 70% C. 80% D. 90% |
C. 80% |
|
|
The time it takes to properly evacuated and dehydrate a system prior to charging with refrigerant is determined by the A. Total volume of the system B. Amount of non condensables (moisture) in the system C. Ambient temperature D. All of the above |
D. All of the above |
|
|
A system that fails to hold a vacuum after evacuation process A. Has a restriction B. May contain moisture C. May have a leak D. B and C above |
D. B and C above |
|
|
To REVOVER refrigerant is to A. Removed refrigerant in any condition from a system in either an active or passive manner, and store it in an external container without necessarily testing or processing B. Reduce contaminants in used refrigerant by oil separation through filter dryers C. Reprocess refrigerant to new product specifications D. Removed refrigerant and change ownership |
A. Removed refrigerant in any condition from a system in either an active or passive manner, and store it in an external container without necessarily testing or processing |
|
|
The process that reduces contaminants in used refrigerant by oil separation with single and multiple passes through devices such as replaceable filter core dryers, which reduce moisture, acidity, and particulate matter is A. Restoring B. Recovery C. Recycling D. Reclaim |
C. Recycling |
|
|
The synthetic lubricant use with HCFC-based temary blends is A. Alkylbenzene B. PAG C. Mineral D. Ester |
A. Alkylbenzene |
|
|
R-134a is a "drop-in" refrigerant for A. R-12 B. R-22 C. R-11 D. R-12 (must change oil) |
D. R-12 (must change oil) |
|
|
The refrigerant condition and state entering the condenser of an air conditioner is a A. Subcooled liquid B. Superheated vapor C. Subcooled vapor D. Liquid |
B. Superheated vapor |
|
|
The condition in state of the refrigerant leaving the receiver is A. Subcooled liquid B. Subcooled vapor C. Superheated vapor D. Superheated liquid |
A. Subcooled liquid |
|
|
The component of an air-conditioning system that changes a low-pressure vapor to a high-pressure vapor is the A. Condenser B. Metering device C. Evaporator D. Compressor |
D. Compressor |
|
|
Refrigerant cylinders should be shipped A. Upside down B. In the vertical upright position C. Parallel with a truck axle D. In crates |
B. In the vertical upright position |
