Engineering Materials Set 6

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This set of Engineering Materials Multiple Choice Questions & Answers (MCQs) focuses on Engineering Materials Set 6

Q1 | Cold work is done on the metal
  • Below the thermal critical range
  • Above the thermal critical range
  • At zero degree centigrade temperature
  • After slightly warning the metal in furnace
  • None of the above
Q2 | Which of the following timber is used for sports goods?
  • Mulberry
  • Mahogany
  • Sal
  • Deodar
  • None of the above
Q3 | The statement that, at equilibrium, the number of phases plus the degrees of freedom must equal the number of components plus two is known as
  • Gibbs phase rule
  • Lever rule
  • Fick's rule
  • Heisenberg rule
  • None of the above
Q4 | Steel balls for ball bearings are hardened to
  • 100 VPN
  • 400-700 VPN
  • 700-800 VPN
  • 150-200 VPN
  • 200-400 VPN
Q5 | Muntz metal contains
  • Copper-tin
  • Copper-chromium
  • Copper-nickel
  • Copper-zinc
  • Copper-alminium
Q6 | Corrosion is a destructive attack on metals
  • Which may be chemical or electrochemical in nature
  • Which is basically caused by atmospheric air
  • Which is caused by contact with other metals
  • At high temperature
  • None of the above
Q7 | The depth hardness of steel increases by the addition of
  • Silicon
  • Nickel
  • Manganese
  • Sulphur
  • Chromium
Q8 | Dielectric strength of a material is
  • Capacity to withstand high voltage
  • Magnetic property
  • Energy storage capacity
  • Capacity to resist flow of current
  • Capacity to take two stresses
Q9 | The presence of sulphur in pig iron makes
  • Its casting unsound
  • It malleable
  • It brittle
  • It hard
  • It machinable
Q10 | Shot blasting is the process for the cleaning of
  • Pattern
  • Cores
  • Moulding sand
  • Welded components
  • Castings
Q11 | The process of zinc coating used extensively for protecting steel from atmospheric deterioration is known as
  • Anodizing
  • Colourizing
  • Pakerizing
  • Galvanizing
  • None of the above
Q12 | The process of producing parts by electrolytic deposition of metal upon a conductive removable mould or matrix is known as
  • Plating
  • Deposition
  • Electro-moulding
  • Electrolysis
  • Electro forming
Q13 | Some engineering materials are made up of more than one phase, with different mechanical properties, such materials are known as
  • Discontinuous
  • Brittle
  • Plastic
  • Heterogeneous
  • None of the above
Q14 | Chromium when added as an alloying element to steels
  • Increases corrosion resistance
  • Increases red hardness
  • Refines the grain structure
  • Improves mechanical properties
  • Softens the material
Q15 | The essential gradient of any hardened steel is
  • Martensite
  • Cementite
  • Pearlite
  • Carbon
  • Austenite
Q16 | Which type of thermostat is generally used in applicances with heating elements?
  • Bimetallic
  • Magnetic
  • Clad metal
  • Ferromagenetic
  • None of the above
Q17 | In order to measure/detect materials by non-destructive testing the method generally used is
  • Mossbanser effect
  • Thermochemic point
  • Infrared radiometer
  • Liquid crystallography
  • Acoustic emission
Q18 | The defect blow hole in castings is caused due to
  • Hard ramming
  • Excessive moisture
  • Improper venting
  • Excessive carbouacious material
  • Any of the above
Q19 | Spring steels should have high resistance to
  • Shocks
  • Fatigue
  • Corrosion
  • Deformation
  • All of the above
Q20 | The specific gravity of cast iron is closer to
  • 11
  • 9
  • 7
  • 5
  • 3
Q21 | The theory of failure generally applied in case of brittle materials is
  • Maximum shear stress theory
  • Maximum principal stress theory
  • Theory of superposition
  • Maximum strain energy theory
  • Maximum shear strain energy theory
Q22 | All of the following are destructive tests on materials EXCEPT
  • Charpy test
  • Tensile test
  • Cupping test
  • Fatigue test
  • Shore's scleroscope hardness test
Q23 | If steel is quenched in oil the structure obtained is
  • Acicular
  • Troosite
  • Pearlite
  • Sorbite
  • Martensite
Q24 | Which of the following is p-type semi-conductor?
  • Selenium
  • Silicon doped with phosphorous
  • Silicon doped with gallium
  • All of the above
  • None of the above
Q25 | The amount of energy expended by the action of external force in deforming an elastic body is known as
  • Elastic energy
  • Deformation energy
  • Strain energy
  • Work done
  • Potential energy