Safety
The US law that governs labor and workplace safety requirements.
What is OSHA?
Types of refrigerant compressors.
What is hermetic, semi-hermetic, and open-drive?
Dip it in a bath of ice water.
How do you calibrate a thermometer?
A service valve stem turned fully clockwise.
What is front-seated?
These should be stored in a vertical position with the valve upward.
What is a refrigerant cylinder?
A location with limited airflow that may be dangerous when entered.
What is a confined space?
A valve on the high side of a system.
What is the discharge service valve?
At sea level, this is the reading on a gauge for 19.7 PSIA.
What is 5 PSIG?
Low suction pressure, bubbles in the sight glass, and low discharge pressure.
What are symptoms of a shortage of refrigerant?
A classification system to identify the toxicity and flammability of refrigerants.
What is ASHRAE Standard 34?
The acronym that denotes the correct usage of a fire extinguisher.
What is PASS (Pull, Aim, Squeeze, Sweep)?
This is the placement of a service valve when only checking pressures.
What is cracked open?
This is used to evaporate refrigerant and moisture in a system at room temperature.
What is a vacuum pump?
UV Dye, Electronic sniffer, Ultrasonic detector.
What are some methods used for leak detection?
The saturation temp for calculating subcooling using 400 series zeotrope blend refrigerants.
What is Bubble Point?
A condition of activity that may result in injury or death.
What is a hazrd?
These are often made using Schrader Valves.
What are access ports?
This only measures from 0 to 14.7 PSIA.
What is a vacuum gauge?
This is the systematic analysis of a problem.
What is troubleshooting?
This means least toxicity and least flammability.
What is ASHRAE Standard 34 Class A1?
Frostbite from refrigerant exposure is an example of this.
What is a refrigerant or temperature hazard?
Constantly adjusts to maintain proper superheat.
What is the Thermostatic Expansion Valve (TXV)?
This part of a pressure gauge straightens as pressure rises.
What is the Bourdon tube?
This system primarily uses superheat when troubleshooting.
What is a capillary tube (fixed orifice) system?
134a with an SP of 25psig and ST of 42F.
What is 13F of Superheat?