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Refrigerators
Does the light really go out when we close the door? From the early icebox to the modern built-in frost-free stainless steel double door works of art, refrigerators have improved greatly over the years, and we seldom think about them until they don't work right. From cleaning methods to repairs, this category is the place to get advice and answers to your questions about refrigerators.
3,286 Questions
What is the average amp of a GE refrigerator?
Look at its nameplate. Divide its power rating by its voltage rating -this will tell you how much current flows when the refrigerator is running on its cooling cycle.
Is the ice maker water dispenser in a refrigerator ruined if it sits unplugged for a year?
No. Unless its cracked from being dried out or anything like that. It should be fine. Just make sure you clean it well before hooking everything up. And don't eat the first set of ice cubes it makes.
Are refrigerators and air conditioners examples of heat engines?
No, refrigerators and air conditioners are not examples of heat engines. Heat engines typically convert heat into mechanical work, while refrigerators and air conditioners transfer heat from one location to another using a refrigeration cycle.
What is the ozone free refrigerant?
One example of an ozone-free refrigerant is HFC-134a, often used as a replacement for CFC-12 in air conditioning and refrigeration systems. It does not contribute to ozone depletion but has a high global warming potential, so alternatives like HFO-1234yf are being developed. These alternatives have lower global warming potential and are more environmentally friendly.
Are magnets a danger for health on refrigerators?
No, magnets used on refrigerators are not a danger to health. They are safe and do not pose any risks to people.
Urine urea nitrogen is a measure of protein breakdown in the body. A test can be done to measure the amount of urea in the urine.
Alternative NamesUrine urea nitrogen
How the test is performedA 24-hour urine sample is needed.
- On day 1, urinate into the toilet when you get up in the morning.
- Afterwards, collect all urine in a special container for the next 24 hours.
- On day 2, urinate into the container when you get up in the morning.
- Cap the container. Keep it in the refrigerator or a cool place during the collection period.
- Label the container with your name, the date, the time of completion, and return it as instructed.
For an infant, thoroughly wash the area around the urethra. Open a urine collection bag (a plastic bag with an adhesive paper on one end), and place it on the infant. For males, place the entire penis in the bag and attach the adhesive to the skin. For females, place the bag over the labia. Diaper as usual over the secured bag.
This procedure may take a couple of attempts -- lively infants can move the bag, causing the urine to be absorbed by the diaper. Check the infant frequently and change the bag after the infant has urinated into it. Drain the urine from the bag into the container provided by your health care provider.
Deliver it to the laboratory or your health care provider as soon as possible upon completion.
How to prepare for the testNo special preparation is needed. If the collection is being taken from an infant, a couple of extra collection bags may be necessary.
How the test will feelThe test involves only normal urination, and there is no discomfort.
Why the test is performedThis test is mainly used to determine a person's protein balance and the amount of dietary protein needed by severely ill patients. It is also used to determine how much protein a person takes in.
Urea is excreted by the kidneys, so excretion of urea can reflect kidney function.
Normal ValuesNormal values range from 12 to 20 grams per 24 hours.
The examples above are common measurements for results of these tests. Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your doctor about the meaning of your specific test results.
What abnormal results meanLow levels usually indicate:
- Malnutrition (inadequate protein in diet)
- Kidney problems
High levels usually indicate:
- Too much protein intake
- Increased protein breakdown in the body
There are no risks.
ReferencesLandry DW, Bazari H. Approach to the patient with renal disease. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 116.
Reviewed ByReview Date: 08/21/2011
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
The freezer is located at the top of the refrigerator. Explain why?
My freezer is at the bottom. The freezer being at the top isn't universal, it was just a common design for a time.
What state is refrigerant leaving receiver?
Refrigerant exits the receiver in a liquid state as it is stored and accumulated in this component after leaving the condenser. It serves as a temporary storage vessel before entering the expansion device in the system.
What material the make the fridge?
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What gas is present in the middle space of the refrigerators?
The gas present in the middle space of refrigerators is usually a refrigerant such as Freon or a more environmentally friendly alternative. This gas is compressed and expanded in a continuous cycle to transfer heat and keep the inside of the refrigerator cool.
Is a magnet on front of a refrigerator friction?
No, a magnet on the front of a refrigerator does not create friction. Friction occurs when two surfaces rub against each other, creating resistance to motion. The magnet on the refrigerator attaches due to magnetic force, not friction.
What is the most common refrigerant used in household refrigerators is?
The most common refrigerant used in household refrigerators is R-134a.
Yes, inhaling R134a can cause dizziness, headaches, and respiratory irritation. In high concentrations, it can lead to asphyxiation by displacing oxygen in the air. It's important to handle and use R134a with proper safety precautions and in well-ventilated areas.
Where does the heat go in a refrigerator?
In a refrigerator, heat is removed from the interior compartment and expelled into the surrounding room through the condenser coils located at the back or bottom of the refrigerator. This process allows the interior of the refrigerator to stay cool while the heat is dissipated into the room, helping to maintain a cold environment inside the fridge.
How can metal help to close a fridge door?
Magnets can be used to help a metal fridge door close by attracting and holding the door in place. Adding a small metal plate to the door or using magnetic strips along the edges can create a stronger seal when the door is closed.
Do refrigerator filters remove chloramines?
Yes, most refrigerator filters are effective in removing chloramines, which are a combination of chlorine and ammonia often used as a disinfectant in water treatment. These filters typically use activated carbon to adsorb chloramines and other impurities from the water, providing you with cleaner and safer drinking water.
What is the evaporator cycle in refrigeration?
The evaporator cycle in refrigeration involves the refrigerant absorbing heat from the surrounding space, causing it to evaporate and turn into a low-pressure gas. This process cools the space and allows the refrigerant to carry the absorbed heat to the condenser for release. The cycle repeats as the refrigerant circulates through the system to maintain the desired temperature.
What is the purpose of an evaporator in the refrigeration cycle is to?
The purpose of the evaporator in the refrigeration cycle is to absorb heat from the space being cooled, causing the refrigerant to evaporate and turn into a gas. This process cools the air inside the space and allows the refrigerant to carry the absorbed heat to the compressor for further processing.
What is the purpose of primary refrigerant?
Primary refrigerants are used in refrigeration systems to absorb and release heat as they circulate through the system, enabling the cooling process. They play a key role in transferring thermal energy, allowing for effective cooling and maintaining desired temperatures in various applications such as HVAC systems, refrigerators, and freezers.
Why have refrigerator have dubble wall?
Refrigerators have a double wall to provide better insulation. The space between the two walls is usually filled with a gas or foam insulation to help maintain a consistent temperature inside the refrigerator, making it more energy efficient and reducing the workload on the compressor.
Why must no foreign vapors be left in a refrigeration system?
Foreign vapors left in a refrigeration system can contaminate the refrigerant and cause a decrease in system efficiency, potentially leading to system malfunctions or failures. It can also cause chemical reactions or create harmful byproducts that may be harmful to the system components or environmental health. Proper purging is essential to maintain the system's performance and longevity.
If the compressor in a refrigerator stopped working, the heat transfer cycle would be disrupted because the compressor is responsible for circulating refrigerant and compressing it to remove heat from the interior of the refrigerator. Without the compressor, the refrigerant cannot absorb heat from the interior and release it to the surroundings, resulting in a lack of cooling inside the refrigerator.
Why is the cooling unit of a refrigerator made at the top?
The cooling unit of a refrigerator is typically placed at the top because hot air rises, allowing for easier dissipation of heat. Placing the unit at the top also prevents it from being blocked by food items in the fridge. Additionally, having the cooling unit at the top helps maintain a consistent temperature throughout the refrigerator.
Non condensables in a refrigeration system result in what?
Non-condensable gases in a refrigeration system can lead to reduced system efficiency and cooling capacity. They can cause increased pressure, temperature, and energy consumption, which can result in decreased cooling performance and potentially damage system components over time.
What metal is a fridge made of?
A fridge is typically made of stainless steel. This material is preferred for its durability, resistance to corrosion, and ease of cleaning. Some fridges may also contain components made of aluminum, copper, and plastic.
