REFRIGERANT AND INSULATION - Quiz

1) How the refrigerants are classified based on heat absorption by latent and sensible heat?

Primary and secondary Organic and inorganic Zeotropic and azeotropic Halocarbons and hydrocarbons

2) Which refrigerant is inactive to ozone layer?

R 12 R 13 R 22 R 134a

3) Which is the numerical designation of ammonia refrigerant?

700 + ( Molecular mass of NH3) = 717 700 + (Molecular mass of NH3) = 718 700 + (Molecular mass of NH3) = 719 700 + (Molecular mass of NH 3) = 720

4) What does the number 4 of R 134a indicate?

Number of hydrogen atoms Number of chlorine atoms Number of carbon atoms Number of fluorine atoms

5) Which substance absorbs heat and directly changes its state from solid to vapour?

Ice Dry ice Primary refrigerants Secondary refrigerants