Tool Materials MCQ

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

• __________ are widely used as projectile cores for armor piercing weapons.
  ক

  Sintered friction material

  খ

  Cermet

  গ

  Cemented carbide

  ঘ

  Dispersion strengthened material
• High-pressure nozzle made of cemented carbides are used in ________ industry.
  ক

  Chemical

  খ

  Sheet processing

  গ

  Textile

  ঘ

  Mining
• Cemented carbide dies replace diamond dies for hole diameters between _______
  ক

  0.004-0.04 inch

  খ

  0.04-0.4 inch

  গ

  0.4-0.9 inch

  ঘ

  0.004-0.1 inch
• Composite tips, consisting of a thin layer of TiC-Co bonded on a WC-Co grade use is rapidly increasing.
  ক

  True

  খ

  False
• High TiC content (25-60%) is used particularly for _________
  ক

  High finish turning and drilling of steel

  খ

  Roughing operation

  গ

  Medium cuts and speeds on steel

  ঘ

  Rough cuts on Cast iron
• _______ composition of the carbide cutting tool is suitable for roughing operations.
  ক

  Low-Co

  খ

  High-Co

  গ

  Medium-Co

  ঘ

  Ultra-high-Co
• The wear due to the indenting action of hot, rough, hard and coiled chips behind the cutting-edge leads to ________
  ক

  Cratering

  খ

  Grinding cracks

  গ

  Crumbling

  ঘ

  Built-up edge
• The phenomenon of ______ occurs by the combination of considerable pressure, high temperature and longer time of contact only within a certain speed range.
  ক

  Brazing cracks

  খ

  Grinding cracks

  গ

  Crumbling

  ঘ

  Built-up edge
• Which of the following is not a cause for failure of the cutting tools?
  ক

  Crumbling

  খ

  Hair-type cracks

  গ

  Grinding cracks

  ঘ

  Thermal shocks
• ________ occurs due to material built-up at the cutting edge.
  ক

  Brazing cracks

  খ

  Comb-type cracks

  গ

  Crumbling

  ঘ

  Grinding cracks
• Cemented carbide cutting tool is advantageous in mass production.
  ক

  True

  খ

  False
• Which of the following is not a characteristic of cemented carbide cutting tools?
  ক

  Extremely hard

  খ

  Very brittle

  গ

  High red hardness

  ঘ

  Low red hardness
• ______ is the most important application of cemented carbides.
  ক

  Dies

  খ

  Cutting Tools

  গ

  Drilling Tools

  ঘ

  Deep drawing Tools
• The microstructure of WC-TiC-Co alloy contains ____ phases.
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• The microstructure of WC-Co alloy contains ____ phases.
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• The cutting performance of cemented carbide can be plotted as _________
  ক

  T-V curve

  খ

  C-P curve

  গ

  I-V curve

  ঘ

  M-V curve
• Which of the following property of cemented carbide increases on increase in Co content?
  ক

  Coefficient of thermal expansion

  খ

  Hardness

  গ

  Density

  ঘ

  Thermal conductivity
• Lower thermal conductivity of cemented carbides leads to formation of _________
  ক

  Brazing cracks

  খ

  Comb-type cracks

  গ

  Grinding cracks

  ঘ

  Crumbling
• The oxidation resistance of WC-Co composition is higher than that of the WC-TiC-Co composition.
  ক

  True

  খ

  False
• Transverse-Rupture strength of cemented carbide is a measure of _________
  ক

  Hardness

  খ

  Wear resistance

  গ

  Toughness

  ঘ

  Compressive strength
• _________ of cemented carbide tools is used as a measure of wear performance.
  ক

  Hot hardness

  খ

  Transverse rupture strength

  গ

  Compressive strength

  ঘ

  Hardness
• Cemented carbide grades can be classified into _____ groups, according to their density by using Hg as a buoyancy medium.
  ক

  2

  খ

  3

  গ

  4

  ঘ

  5
• ______ of cemented carbide is the measure of the completeness of sintering operation.
  ক

  Density

  খ

  Volume

  গ

  Strength

  ঘ

  Ductility
• Which of the following is the correct sequence of grinding cemented carbides?
  ক

  Rough grinding

  খ

  Coarse grinding, polishing, and fine grinding

  গ

  Rough grinding, and final grinding

  ঘ

  Fine grinding
• Which of the following is not a characteristic of hot-pressed material?
  ক

  Hard

  খ

  Ductile

  গ

  Wear- resistant

  ঘ

  Zero residual porosity
• _________ is used to produce large carbide balls, bushes and hollow sections with more uniform density.
  ক

  Isostatic pressing

  খ

  Extrusion compaction

  গ

  Rolling

  ঘ

  Forging
• Milled powder mixtures are unsuitable for automatic pressing in comparison to agglomerated carbide-cobalt powder mixtures.
  ক

  True

  খ

  False
• During _______, no liquid phase forms and ________ of only the binder metal occurs.
  ক

  Pre-sintering, liquid phase sintering

  খ

  Liquid phase sintering, pre-sintering

  গ

  Pre-sintering, solid phase sintering

  ঘ

  Solid phase sintering, pre-sintering
• The classical method of production of cemented carbide tips is ________
  ক

  Hot pressing

  খ

  Infiltration

  গ

  Double-sintering

  ঘ

  Liquid phase sintering
• In which organic liquid is the lubricant, paraffin wax dissolved?
  ক

  Gasoline

  খ

  Ether

  গ

  Light hydrocarbons

  ঘ

  Alcohol