Which of the following refrigerant has the least tendency to leak:

After ______ the servicing of R-22-based systems will rely on recycled refrigerants

For all commercial appliances that have a refrigerant charge of more than 50 pounds, the trigger leak rates shall be ______ for a 12-month period so that the owner or operator must take corrective action.

In halide leak test, if there is a freon refrigerant leak the flame will turn ______:

A dense _____ smoke forms when the ammonia comes in contact with the sulfur dioxide

The hydrolysis rate for the Freon compounds as a group is _____ compared with other halogenated compounds.

Latent heat of refrierant is expressed in Btu per second

Which of the following refrigerant has least density:

Fluorocarbons decompose when exposed directly to ____ temperatures

High molecular weight of the Freon compounds contributes to ____ specific heat values

Which of the following refrigerants are used in the standard absorption type of refrigeration system:

Which of the following is not a desirable property for a good refrigerant:

Freons R-12 and R-22 have the ______ specific volumes as vapors:

A _____ specific heat is desirable property of the refrigerant:

A refrigeration should have a _____ latent heat of evaporation per unit of weight: