Refrigeration Systems and Regulations Quiz

<p>Three oxygen atoms per molecule (O3). (B)</p> Signup and view all the answers

<p>The size of the vacuum pump and the suction line diameter. (A)</p> Signup and view all the answers

<p>All of the above. (D)</p> Signup and view all the answers

<p>They can enact stricter regulations but cannot ease or reduce the federal Clean Air Act/EPA regulations. (A)</p> Signup and view all the answers

<p>It readily absorbs moisture from the air. (C)</p> Signup and view all the answers

<p>Liquid charged into a deep vacuum will cause the refrigerant to boil and may lower temperatures enough to freeze the water in the tubes. (B)</p> Signup and view all the answers

<p>Trapped water may freeze due to the rapid pressure drop. (B)</p> Signup and view all the answers

<p>Shaft seal (C)</p> Signup and view all the answers

<p>Maintain system pressure slightly above atmospheric. (C)</p> Signup and view all the answers

<p>35% (D)</p> Signup and view all the answers

<p>System water pumps, the recovery compressor, and the recovery condenser water should all be on. (C)</p> Signup and view all the answers

<p>The evaporator (D)</p> Signup and view all the answers

<p>The top of the condenser (A)</p> Signup and view all the answers

<p>three-part (D)</p> Signup and view all the answers

<p>condenser (B)</p> Signup and view all the answers

<p>According to the EPA there are no 'drop-in' replacements (B)</p> Signup and view all the answers

<p>assure refrigerant is recovered and recycle the metal (A)</p> Signup and view all the answers

<p>chlorine, fluorine, carbon (D)</p> Signup and view all the answers

<p>recover the refrigerant (C)</p> Signup and view all the answers

<p>flushing with liquid refrigerant to clean tubing (C)</p> Signup and view all the answers

<p>all of the above (D)</p> Signup and view all the answers

<p>It captures refrigerant in a non-pressurized container. (A)</p> Signup and view all the answers

<p>They form hydrochloric and hydrofluoric acids. (C)</p> Signup and view all the answers

<p>Sales are restricted to EPA certified technicians only. (A)</p> Signup and view all the answers

<p>Repairing a leak if more than 35% of the charge escapes in 12 months. (A)</p> Signup and view all the answers

<p>Domestic refrigerators (D)</p> Signup and view all the answers

<p>It is advisable to recover all vented refrigerant. (D)</p> Signup and view all the answers

<p>All of the above. (D)</p> Signup and view all the answers

<p>None of the listed refrigerants need recovery devices. (B)</p> Signup and view all the answers

<p>15% (B)</p> Signup and view all the answers

<p>R-22 (A)</p> Signup and view all the answers

<p>R-123 (B)</p> Signup and view all the answers

<p>excessive superheat (A)</p> Signup and view all the answers

<p>the appliance contains over 15 pounds of refrigerant (C)</p> Signup and view all the answers

<p>using a filter drier (A)</p> Signup and view all the answers

<p>receiver (B)</p> Signup and view all the answers

<p>to pinpoint refrigerant leaks (D)</p> Signup and view all the answers

<p>Because any comparisons to a pressure-temperature chart is only valid if both the pressure and temperature of the refrigerant are stable. (D)</p> Signup and view all the answers

<p>It can only function as a recovery device with a non-pressurized container. (B)</p> Signup and view all the answers

<p>It can be vented. (B)</p> Signup and view all the answers

<p>They can refuse to process the refrigerant and return it. (B), They can agree to destroy the refrigerant for a fee. (C)</p> Signup and view all the answers

<p>To connect the recovery device to an appliance and prevent refrigerant loss when disconnected. (A)</p> Signup and view all the answers

<p>It must recover 95% of the refrigerant from appliances regardless of compressor functionality. (C)</p> Signup and view all the answers

<p>It can be destroyed for a fee but not processed otherwise. (A)</p> Signup and view all the answers

<p>Potential refrigerant loss during disconnection. (D)</p> Signup and view all the answers

A mixture composed of three different refrigerants.

Converts high pressure vapor to high pressure liquid in a refrigeration system.

According to the EPA, there are no approved drop-in replacements for R-12.

All refrigerant must be recovered and the cylinder rendered useless before recycling.

Contain chlorine, fluorine, and carbon.

You must recover the refrigerant before disposing of any system.

Flushing with liquid refrigerant for cleanup is not an approved technique.

Leak in uneven amounts due to different vapor pressures.

Refers to preventing liquid refrigerant from being trapped between service valves during transfer.

Safe pressure for leak testing can be determined by the low-side test-pressure data-plate value.

Technicians must recover mixed refrigerants (like R-502 in R-22) into a separate tank.

Ozone in the stratosphere consists of molecules of three oxygen atoms.

The size of the vacuum pump and suction line influences the length of dehydration time.

Technician should explain that refrigerant recovery is vital for health and environmental protection.

State and local governments can create stricter regulations than the Clean Air Act/EPA guidelines.

Hygroscopic oil readily absorbs moisture from the environment.

A recovery device that never needs a pump, compressor, or heat for small appliances.

Restricted to technicians who are EPA certified in refrigerant recovery.

It is not mandatory to repair a small appliance leak but is recommended when over 35% of the charge escapes a year.

A passive recovery device can be used on domestic refrigerators.

It is critical to inspect, replace damaged cores, and cap the schrader ports to prevent leakage.

Exposure to high temperatures can decompose these refrigerants into hydrochloric and hydrofluoric acids.

Any refrigerant vented from a graduated charging cylinder must be recovered.

Recover the refrigerant from the high side of the system is crucial for efficient recovery.

Allows for accurate pressure readings in recovery cylinders.

Used as an active recovery device only in combination with a non-pressurized container.

Nitrogen can be vented when used to pressurize or blow debris.

A reclamation plant can refuse processing or charge for destruction.

Connect recovery devices with minimal refrigerant loss when disconnected.

Must recover 95% of refrigerant from small appliances prior to disposal.

Standards for recovering refrigerant to protect the environment.

Pressure and temperature of refrigerant must be stable for valid comparisons.

EPA regulations mandate repairs if leak exceeds 15% per year.

Leaking industrial refrigerant must be repaired if leaks exceed 35% per year.

Older residential ACs typically use R-22 refrigerant.

An equipment room monitor is required for R-123 refrigerant.

Leak checks on R-134a systems should be done using pressurized nitrogen.

Excessive superheat in a high-pressure system may indicate a leak.

Used to pinpoint refrigerant leaks effectively.

Refrigerant exits the receiver as a high pressure liquid.

Introducing refrigerant vapor into the system before liquid charging to avoid freezing.

Using a large vacuum pump can freeze trapped water in the system.

The shaft seal on a low-pressure chiller with an open compressor is prone to leaks.

Maintain system pressure slightly above atmospheric to prevent air accumulation.

Commercial systems must be repaired when the leak rate exceeds 35% per year.

During vapor recovery, all system water pumps, the recovery compressor, and recovery condenser water should be on.

After leaving the purge unit, refrigerant goes to the evaporator in a low-pressure centrifugal system.

Replacement of an evaporator coil is always considered a major repair under EPA regulations.