Exam 4: General Safety Practices

Refrigerants from a refrigeration system that has a burned out motor-compressor assembly can be dangerous because it could contain a high concentration of ____________________.

Oil must never be used around a(n) ____________________ cylinder.

-A cylinder with 1,500 sq. in. of internal surface contains R-22 and is in a service truck body at 120°F. What is the total outward force of the refrigerant against the inner wall of the cylinder in tons of pressure?

When transferring refrigerants from a cylinder to a refrigeration system or any other container, you should always wear ____.

In electrical circuits, the _____ wire protects the operator.

Why should a ground fault interrupter be used with portable electric tools?

When turning off the electrical power at a disconnect panel to work on an electrical circuit, what should you do to ensure that no one will turn the power on until you have finished and are ready?

What safety precaution is required before starting an electric motor?

Fires that involve electrical equipment are classified as Type _____ fires.

Aluminum ladders are safe to use around electrical equipment as long as they have insulation pads on the bottom of the rungs.

Fire extinguishers that can be used on any type of fire, A, B, or C generally contain a _____ to extinguish the fire.