Q.1
What is the disadvantage of powder metallurgy ?
  • no skill labor required
  • reduction in production time
  • close dimensional tolerence
  • die design limit the size of product
Q.2
Which one is not the powder metallurgy product ?
  • iron & steel
  • aluminium
  • tin
  • zinc
Q.3
Based on answer below, which is not the type of particle shape in Powder Metallurgy?
  • spherical
  • diamond
  • spongey
  • flakey
Q.4
What is Mesh Count
  • refers to the number of openings per linear inch of screen
  • refers to the number of inch of screen
  • refers to the numbers of particles
  • all of above
Q.5
Green strength is
  • Strength of unsintered components
  • Strength sintered components
  • Strength of raw metals
  • Difference in strength of sintered and unsintered components
Q.6
Porosity of sintered products can be improved by process of ____________ by which the pores are filled with a lower melting point metal by capillary action
  • Polymerisation
  • Pulverisation
  • Fragmentation
  • Infiltration
Q.7
Copper is the primary metal produced by ______________
  • Atomisation
  • Crushing
  • Electrolysis
  • Compaction
Q.8
___________ is the process of formation of metal powder to use in powder metallurgy by reducing some compound with CO or other reducing agents.
  • Reduction
  • Atomisation
  • Pulverisation
  • Electrolytic Process
Q.9
The disintegration of a molten metal into particles by a rapidly moving gas or liquid stream or by other means is known as ____________
  • Mechanical Pulverisation
  • Atomization
  • Chemical reduction
  • Electrolytic Process
Q.10
Range of particle size in powder to be used for powder metallurgy should vary from ___________________. Powder metallurgy has small wastage of material.
  • 4 microns to 200 microns
  • 0.300 to 0.003 microns
Q.11
The _________________ process yields net-shape, or near-net-shape parts, so that little or no machining is required to obtain a finished part in many cases.
  • Pulverisation
  • powder metallurgy
  • Atomic Reduction
  • Electrolytic process
Q.12
The production of highly porous parts by ________ using suitable spacer materials is a well-established technique for titanium and stainless steel.
  • Press forming
  • Sand casting
  • Metal casting
  • powder metallurgy
Q.13
___________ is simply the empty space in the product material.
  • Viscosity
  • Malleability
  • Porosity
  • Ductility
Q.14
The process which allows us to create high-quality components, while near-net-shape dimensional control provides a high degree of control over the manufacturing process, facilitating the production of complex shapes is _________________
  • Powder metallurgy
  • Sand Casting
  • Machining
  • Metal casting
Q.15
Process of forming metal powder by directing molten metal through an orifice after which it is break into small particle using high pressure fluid is known as?
  • Atomization
  • Reduction
  • Crushing
  • Electrolysis
Q.16
Sintering is a ____________________process commonly used to increase the strength and structural integrity of a material. Powder metallurgy use sintering to convert metal powders to end-use parts.
  • Mixing
  • heat treatment
  • Pressing
  • All the above
Q.17
Density in sintered product is improved byi.) hot pressing ii.) Cold pressing iii.) Machining iv.) Coining
  • i, ii & iv
  • ii & iv
  • i & iv
  • i, ii, iii & iv
Q.18
Sintering increases
  • electrical conductivity, density and ductility
  • electrical conductivity, density and brittleness
  • porosity, electrical conductivity and brittleness
  • porosity, density and ductility
Q.19
Which of the following tool is manufactured by powder metallurgy?
  • High speed steel
  • Sintered carbides
  • High carbon steel
  • Low carbon steel
Q.20
The parts produced by Powder metallurgy
  • always require machining
  • are of higher dimensional accuracy
  • can not be heat treated
  • none of the above
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