NextMockపరీక్షలు వెతకండి, ఉదా. SSC CGL, UPPSC, Lekhpal
UPSC PYQPrelims 2023

Civil Services Examination · ప్రశ్న 20

Consider the following: 1. Aerosols 2. Foam agents 3. Fire retardants 4. Lubricants In the making of how many of the above are hydrofluorocarbons used?

  1. Only one
  2. Only two
  3. Only three
  4. All four
సమాధానం చూపించు & వివరణ

సమాధానం: (D) All four

వివరణ

HFCs are used as aerosol propellants, foam-blowing agents, fire suppressants and in lubricants/solvents (besides refrigerants).