REFRIGERATION DIRECT COOL - Quiz

1) Which is the hydrocarbon refrigerant?

R 12 R123 R 500 R 600a

2) Which refrigerant property is desirable for V.C system?

Low boiling point Corrosive to metals Low latent heat valve Low Dielectric strength

3) Which type of compressor is used as a vacuum pump?

Reciprocating Centrifugal Rotary Scroll

4) What is the full form of the relay - PTC?

Positive temperature coefficient Permanent temperature control Polar terminal checking Positive terminal circuit

5) Which refrigerant blend is highly flammable?

HCFC HFC CFC HC