REFRIGERANT AND INSULATION - Quiz

1) Which property is desirable for an ideal refrigerant?

High boiling point High freezing point High specify volume High latent heat value

2) What is the category of R 290 refrigerant?

Halocarbons Azeotropes Hydrocarbons Organic compounds

3) What type of heat is absorbed by primary refrigerant?

Total heat Latent heat Specific heat Sensible heat

4) How much is the maximum capacity of refrigerant to be filled in a returnable service cylinder?

Up to 95% Up to 90% Up to 85% Up to 80%

5) What is the desirable property of POE lubricant?

Hygroscopic Miscible with HFCs Forms acid with moisture Toxic gas produced during brazing