Refrigeration of Fruits MCQ

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• Why is condenser used in refrigerator?
  ক

  To maintain low pressure

  খ

  To maintain high pressure

  গ

  To maintain low temperature

  ঘ

  To maintain high temperature
• Which oil is used in refrigerator compressor?
  ক

  Polyolester oil

  খ

  Polyether oil

  গ

  Polyester oil

  ঘ

  Polyether oil and polyester oil
• Why is compressor used in refrigerator?
  ক

  To maintain low pressure

  খ

  To maintain high pressure

  গ

  To maintain constant temperature

  ঘ

  To maintain high temperature
• What is the full from of COP?
  ক

  Coefficient of performance

  খ

  Coefficient of power

  গ

  Constant of performance

  ঘ

  Constant of power
• Who invented refrigerator?
  ক

  Oliver Evans

  খ

  William Cullen

  গ

  Nicolas Appert

  ঘ

  Jacob Parkins
• Can coefficient of performance be more than1?
  ক

  True

  খ

  False
• Is a higher COP better?
  ক

  True

  খ

  False
• What is chiller approach?
  ক

  Difference between the leaving water temperature and the saturated refrigerant temperature

  খ

  Ratio between the leaving water temperature and the saturated refrigerant temperature

  গ

  Difference between the saturated refrigerant temperature and water temperature

  ঘ

  Ratio between the saturated refrigerant temperature and water temperature
• Which cycle is used in refrigeration?
  ক

  Vapor-compression refrigeration cycle

  খ

  Compression refrigeration cycle

  গ

  Vapor refrigeration cycle

  ঘ

  Evaporative refrigeration cycle
• What is the difference between freezing and refrigeration?
  ক

  Only the temperature

  খ

  Only the pressure

  গ

  Only the energy consumption

  ঘ

  Temperature, pressure and energy consumption