Refining MCQ

Test your knowledge with important Refining MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Refining MCQs at Bissoy

• Which of the following refining method is most important commercially?
  ক

  Physical methods

  খ

  Chemical methods

  গ

  Electrochemical methods

  ঘ

  Ionic methods
• What is the name of the process in which the deposition of metal from vapours take place?
  ক

  Chemical vapour deposition

  খ

  Physical vapour deposition

  গ

  Condensation

  ঘ

  Vaporization
• In which type of refining method, impurities are converted to compounds by adding refining agents?
  ক

  Physical

  খ

  Chemical

  গ

  Electro-chemical

  ঘ

  Ionic
• Which principle is used more efficiently in the zone refining process?
  ক

  Fractional distillation

  খ

  Fractional crystallization

  গ

  Electrolytic refining

  ঘ

  Selective dissolution
• During electrolytic refining, what are the impurities which settle at the bottom of the cell below anode called?
  ক

  Rust

  খ

  Cathode slime

  গ

  Noble metals

  ঘ

  Anode slime
• In electrolytic refining, what is used as anode?
  ক

  Pure metal

  খ

  Metal ore to be refined

  গ

  Catalyst

  ঘ

  Carbon
• Which process is used to refine an impure compound by dissolving it in a suitable acid or alkaline medium?
  ক

  Solvent extraction

  খ

  Partition

  গ

  Selective dissolution

  ঘ

  Stripping
• On what factor does the liquation technique based on?
  ক

  Immiscibility of phases

  খ

  The difference in freezing points of the alloy components

  গ

  The difference in the atomic number of the alloy elements

  ঘ

  The difference in the molecular weight of the components of the alloy
• Which of the following is not a physical method of the refining processes?
  ক

  Selective distillation

  খ

  Chemical vapour deposition

  গ

  Zone refining

  ঘ

  Parke’s process
• In the physical methods of the refining processes, no chemical reaction takes place.
  ক

  True

  খ

  False
• Which of the following properties of the metal is considered high during the sublimation on a compound?
  ক

  Melting point

  খ

  Freezing point

  গ

  Vapour pressure

  ঘ

  Atomic number
• What is the advantage of conducting sublimation at low temperature?
  ক

  Decomposition of heat-sensitive impurities are reduced

  খ

  Corrosion is increased

  গ

  Process becomes economical

  ঘ

  Energy consumption is reduced
• Which of the following approach for purification of metals is used for the production of inexpensive metals like iron, lead, tin etc.?
  ক

  Production of pure metal compounds

  খ

  Creation of proper thermodynamic condition

  গ

  Creation of proper kinetic condition

  ঘ

  Production of impure bulk metal
• Which of the following is one of the basic approach for the purification of metals?
  ক

  Production of pure metal compounds

  খ

  Production of impure metal compounds

  গ

  Production of improper slag

  ঘ

  Production of slag in bulk
• Which of the following conditions can be created properly for the transfer of impurities away from the metallic phases?
  ক

  Climatic

  খ

  Thermodynamic

  গ

  Hydrostatic

  ঘ

  Physical
• In __________ both the burst and tear strengths are crucial, although increment in refining to raise the burst strength leads to less tear strength.
  ক

  Brown paper bag

  খ

  Polythene

  গ

  Black paper bag

  ঘ

  Carton bag
• __________ is a measure of the power input to the motors of the refiner based on the amount of pulp processed. It’s an indirect measure of the energy spent in cutting.
  ক

  Refining power

  খ

  Actualization power

  গ

  Compartmentalization power

  ঘ

  Degree power
• Fill in the blank. __________= (∑ Ni X Li)/ (∑ Ni)
  ক

  Pulp average processed

  খ

  Mass average processed

  গ

  Weight average processed

  ঘ

  Number average length
• What is the name of the part?
  ক

  Cutting coarse bar

  খ

  Double disk refiner

  গ

  Twin flow refiners

  ঘ

  Food processing
• Refiners are machines that mechanically macerate and/or cut pulp fibers prior to making them into paper.
  ক

  True

  খ

  False
• What are the 2 types of refiners in refining?
  ক

  Cubical and cuboidal

  খ

  Circular and triangular

  গ

  Disk and conical

  ঘ

  Conical and circular
• A __________ is an early device used to treat pulp to improve the papermaking properties.
  ক

  Refiner

  খ

  Beater

  গ

  Hinge

  ঘ

  Spreader cone
• __________ is the production of rough surfaces on fibers by mechanical action; refiners break the outer layer of fibers and the secondary cell wall to protrude from the fiber surfaces.
  ক

  Fibrillation

  খ

  Drainage

  গ

  Fiber cutting

  ঘ

  Fiber brushing
• Pulp refining is a chemical treatment process of pulp fibers to evolve their papermaking properties in which paper properties depend on the product being made.
  ক

  True

  খ

  False
• Why is zone refining carried out in an inert atmosphere?
  ক

  To prevent reduction of metal

  খ

  To prevent oxidation of metal

  গ

  To reduce the external pressure

  ঘ

  To reduce the external temperature
• Which of the following is not refined by zone refining method?
  ক

  Germanium

  খ

  Silicon

  গ

  Gallium

  ঘ

  Gold
• Which of the following is an electrolyte used during the electrolytic refining of copper?
  ক

  Copper sulphate solution

  খ

  Copper sulphate solution acidified with sulphuric acid

  গ

  Sulphuric acid

  ঘ

  Copper chloride
• What is the purity range for copper obtained from electrolytic refining?
  ক

  90-95%

  খ

  98-99%

  গ

  100%

  ঘ

  99.95-99.99%
• What is the anode made up of in electrolytic refining?
  ক

  Impure metal

  খ

  The metal ore

  গ

  Pure metal

  ঘ

  Double salt of metal
• Which of the following processes is used to purify lead?
  ক

  Distillation

  খ

  Liquation

  গ

  Electrolytic refining

  ঘ

  Zone refining