The Refrigeration Cycle
Using suction, a compressor draws in refrigerant by creating this inside the evaporator.
What is low pressure?
This is the person a technician should speak with first when troubleshooting a problem.
Who is the building owner?
These symbols convey health, physical, and environmental hazard information assigned to a GHS category.
What are Hazard Pictograms?
Mechanical fittings are required when you are joining these types of metal joints.
What are dissimilar metals?
This is the term for a liquid’s resistance to flow.
What is viscosity?
This heat-exchanging device is specifically designed to expel or reject heat from the system.
What is a condenser?
This is the specific item listed in the very first column of a troubleshooting chart.
What is the problem?
This is the greatest hazard associated with using a hand tool.
What is using it for a purpose other than that for which it was intended?
This is the only type of refrigerant system that generally uses steel pipe to circulate refrigerant.
What is ammonia?
This type of heat is added to a substance to cause a change of state without raising its temperature.
What is latent heat?
As refrigerant exits the condenser, it is in this physical state and pressure level.
What is high-pressure liquid?
This tool type is unique because it features only single-cut teeth.
What is a mill file?
When cutting or removing asbestos, you must run a ventilation system equipped with this specific filter.
What is a HEPA filter?
When swaging, the length of the overlap of the two pieces of tubing should equal this measurement of the tubing.
What is the outside diameter?
This is the range of temperatures at which individual refrigerants in a zeotropic blend change phase.
What is temperature glide?
This state of refrigerant is capable of absorbing the most amount of heat compared to other stages in the cycle.
What is low-pressure liquid?
To check a thermometer for accuracy, you should dip it in this to get a reading close to 32 degrees F
What is a mix of ice and water?
These are signs of heat-related illness, which include nausea, weakness, dizziness, and fainting.
What are elevated body temperature, headache, and confusi
This action is the recommended method for removing an external bending spring from tubing after it has been bent.
What is twisting the spring?
This test determines the temperature at which wax separates out of a mixture of lubricant and refrigerant.
What is a floc test?
These components equalize pressure between the high and low sides during the OFF cycle and work with the suction line as a heat exchanger.
What are capillary tubes?
When using a wrench, you should always perform these two specific actions to loosen and tighten, respectively.
What are pull to loosen and push to tighten?
This type of "investment" is the only item listed that an estimator does not add to a bid.
What is emotional investment?
When brazing, this specific event indicates that the correct brazing temperature has finally been reached.
What is when the filler metal melts and is drawn into the seam?
This is the result of calculating the square root of 2025
What is 45?