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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