J175 Theory

List four (4) typical self-contained hydrocarbon system types

Hydrocarbons will only ignite when within a ____% to _____% mixture with air or oxygen.

List four sources of ignition applicable to Hydrocarbon refrigerants.

Acts and Regulations are legal documents produced by _______________ and _____________ governments to protect the individual members of their societies.

List four types of compressor lubricants that can be used with Hydrocarbon refrigerants

What special precautions must be taken when servicing self-contained hydrocarbon system?

List below the design operating pressures of a R600a frost free refrigerator with design evaporation temperature of -23°C and a design condensing temperature of 45°C.

What safety precautions must be undertaken when disposing of compressor lubricant from a Hydrocarbon system?

List three acceptable methods of removing a Hydrocarbon refrigerant from a system and the safety precautions required for each method

What gas is used to “Flush” a Hydrocarbon system after the Hydrocarbon refrigerant has been removed and explain why flushing is required.