Engineering Materials Set 5

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This set of Engineering Materials Multiple Choice Questions & Answers (MCQs) focuses on Engineering Materials Set 5

Q1 | Any process of heating and cooling steel that produces a rounded or globular from of carbide is known as
  • Spheroidizing
  • Drawing
  • Nomalizing
  • Nitriding
  • Ultra hardening
Q2 | During stress relaxation phenomenon
  • Deformation tends to bind the joint and produces a stress reduction
  • Deformation tends to loosen the joint and produces a stress reduction
  • Stress is no longer proportional to strain
  • Stress reduces on increasing load
  • None of the above
Q3 | The materials which has the same elastic properties in all directions is called
  • Brittle material
  • Homogeneous material
  • Hard material
  • Isotropic material
  • Isentropic material
Q4 | Accounstical materials
  • Isentropic material
  • Create sound
  • Absorb sound
  • Reflect sound
Q5 | Recrystallistion temperature is one
  • At which change of allotropic form takes place.
  • At which crystals start growing in size
  • At which new spherical crystals first begin to form from the old deformed ones when a strained metal is heated
  • At which polycrystalline changes occur
  • At which crystals again begin to appear
Q6 | Super conductors
  • Exist at temperatures below 10?K
  • Are non-crystalline
  • Are non-metallic substances
  • Are the purest forms of metals
  • Are the density metals without voids
Q7 | In powder metallurgy the process of heating the cold pressed metal powder is known as
  • Sintering
  • Granulation
  • Deposition
  • Precipitation
  • None of the above
Q8 | The main constituent of glass is
  • B2O3
  • Al2O3
  • Semi-conductors
  • CaCO3
  • SiO2
Q9 | In iron-iron carbide diagram the
  • Abscissa is time
  • Abscissa is temperature
  • Abscissa is carbon percentage
  • Ordinate is time
  • None of the above
Q10 | Spot the process which is different from others?
  • Galvanizing
  • Chapmanizing
  • Carburizing
  • Cyaniding
  • Nitriding
Q11 | The Curic point for Rochelle salt is about
  • 1000?C
  • 500?C
  • 240?C
  • Absolute zero
  • None of the above
Q12 | Which of the following is the ductile material?
  • Aluminium
  • Zinc
  • Brass
  • Silver
  • Stainless steel
Q13 | The structure of a semi-conductor resemles that of a
  • circle
  • rhombus
  • diamond
  • triangle
  • None of the above
Q14 | In electro-forming the metal is supplied to the mould from
  • Solution
  • By liquids
  • Electrolytic solution in which bar of pure metal acts as an anode for the plating current
  • Separately by coating with a point
  • None of the above
Q15 | A bot in cupola is
  • A part of coupla
  • A defect in casting
  • A kind of cast iron
  • A flux
  • A clay plug to close tap hole
Q16 | Constantan is an alloy of
  • Copper-tin-zinc
  • Copper-tin
  • Copper-aluminium
  • Copper and Nickel
  • Nickel-iron-chromium
Q17 | Hot tear
  • Is a defect in castings
  • Is a process involving heating
  • Is a defect in wood
  • Is a phenomenon occurring in materials ixposed to weather e.g. sun and rain
  • Is a physical property of non-ferrous materials
Q18 | Coarse grained steels
  • Do not have tendency to distort
  • Are less tough
  • Are very tough
  • Are lighter
  • Are denser
Q19 | In press work the dies that perform two or more operations simultaneously, but at different stations are known as
  • Multi-dies
  • Simple dies
  • Compound dies
  • Die and punch set
  • Progressive dies
Q20 | Vanadium is added to steel as an alloying element to
  • To soften the material
  • Increase temperture resistance
  • Increases resistance to corrosion
  • Increase shock resistance
  • Modify yield and tensile strength properties
Q21 | Micro-structure of a material is generally examined by
  • Spectroscope techniques
  • Optical microscope
  • X-rays and electron diffraction
  • Naked eye
  • Microscope
Q22 | Ferri-magnetic materials generally find application as
  • conductors
  • insulators
  • resistors
  • semi-conductors
  • None of the above
Q23 | Which process is used for machining parts to planned dimensions?
  • Shearadising
  • Swaging
  • Electroforming
  • Anodizing
  • Routing
Q24 | Polymers
  • Semi-conductors
  • Can be vaporised but cannot be recycled
  • Can be recycled but cannot be vaporised
  • Can be vaporised as well as recycled
  • Can neither be vaporised nor recycled
Q25 | Which of the following is a fuel used in fast reactors?
  • Chromium
  • Plutonium
  • Zirconium
  • Heavy water
  • Graphite