Practice 1000 Powder Metallurgy Multiple Choice Questions with Answers Quiz-1

Q.1.

Which of the following conditions are necessary for the development of fluid film in porous bearings?

a) High speed
b) Viscosity
c) High speed and viscosity
d) Low speed

Q.2.

What is metallurgy?

a) Technology of designing metals
b) Art and science of extracting metals from their ores
c) Technology of welding metals
d) None of the mentioned

Q.3.

What is powder metallurgy?

a) Production and working of metals as fine powders
b) Working with metals as fine powders
c) Methods for utilizing metals as fine powders
d) None of the mentioned

Q.4.

Which of the following is the application of powder metallurgy?

a) create unique materials with specific qualities that are impossible to accomplish using melting or shaping
b) create unique materials with specific qualities that are possible to accomplish using melting or shaping
c) All of the mentioned
d) None of the mentioned

Q.5.

Which of the following is a step of powder metallurgy?

a) The production of metal powder
b) The consolidation and fusing of the powder into a solid metal
c) The compaction and shaping of the powder
d) All of the mentioned

Q.6.

What is powder sintering process?

a) Cold treatment used to improve a material’s strength and structural integrity
b) Metal freezed to improve its strength and structural integrity
c) Thermal treatment used to improve a material’s strength and structural integrity
d) None of the mentioned

Q.7.

Which of the following transforms compacted mechanical bonds between powder particles into metallurgical bonds?

a) SHP
b) Metal Injection Molding
c) Sintering
d) Mechanical alloying

Q.8.

Which of the following is used to prepare SiN?

a) Hot forging
b) Liquid phase sintering
c) Reaction sintering
d) Solid-state sintering

Q.9.

Which of the following additive is added to improve the tool life of steel parts?

a) Lead
b) Copper
c) Sulphur
d) Bismuth

Q.10.

Steam treatment is not applicable for which of the following parts?

a) annealed parts
b) normalized parts
c) stress relived parts
d) hardened and tempered parts

Q.11.

Tin powder is made by _________

a) Electrolysis
b) Cold stream process
c) Atomization
d) Reduction

Q.12.

Which of the following changes do not occur on during recrystallization?

a) Phase changes
b) Grain shrinkage
c) Precipitation
d) Pore shrinkage

Q.13.

Which of the following substance is added to iron powder to improve the compressive strength of bearing?

a) Lead
b) Copper
c) Sulphur
d) Bismuth

Q.14.

Which of the following material on addition to the powder mix lowers the strength of the bearing?

a) Graphite
b) Oil
c) Sulphur
d) Bismuth

Q.15.

Which of the following is not a characteristic of powder produced by precipitation from an aqueous solution method?

a) Low apparent density
b) Difficult to remove the adherent salts
c) High apparent density
d) Porous in nature

Q.16.

Which of the following P/M parts exhibit a short cutting tool life?

a) Dense
b) Very dense
c) Sintered
d) Porous

Q.17.

What should be added to the iron powder mix to improve the speed capability?

a) Lead
b) Molybdenum
c) Bismuth
d) Vanadium

Q.18.

Which of the following powder production method is used for the production of non-porous bearing with steel backing?

a) Mechanical alloying
b) Water atomization
c) Electrolysis
d) Gas atomization

Q.19.

Which of following is the correct set of material variables in sintering?

a) Green density and particle size
b) Particle structure and sintering atmosphere
c) Green density and sintering time
d) Particle composition, particle shape, green density and sintering temperature

Q.20.

Which of the following are the essential parts of a sintering furnace?

a) Burn-off zone, sintering zone, and cooling zone
b) Sintering zone and cooling zone
c) Burn-on zone, sintering zone, and cooling zone
d) Preheat zone and sintering zone

Support mcqgeeks.com by disabling your adblocker.