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Mechanical Engineering
Powder Metallurgy
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Q.1
The two types of metals are Ferrous and Nonferrous.
True
False
Q.2
Sintering is done to _____________
increase final strength
decrease final strength
initially increase and then to decrease the strength
initially decrease and then to increase the strength
Q.3
What process of rapidly cooling are used.
Air quenching
Oil quenching
Water quenching
Brine quenching
All Of above
Q.4
Metal consists of one or more chemical elements having a crystalline structure.
Atoms
Nuclei
Grains
All Of above
Q.5
Stainless steel contains which elements.
Iron
Carbon
Both A & B
None of these
Q.6
Which of the processes listed below is NOT included in powder metal compaction
Pressing
Casting
Extrusion
Iso-static pressing
Q.7
Powder metallurgy is a process whereby metallic shapes are manufactured from
metallic powders
plastic
machining
grinding
Q.8
Which of below is the limitation / disadvantage of powder metallurgy?
pure metal powders are very expensive to produce
wide range of metaal powder like steels,bronze etc
poor plastic properties except good strength and elongation
the geometries are very limit
Q.9
The following are the advantages of powder metallurgy EXCEPT?
composition of product can be controlled
close dimensional tolerances can be mantained
there are no lost of material
the product has high porosity
Q.10
A atom that gains electrons in the reaction is ...
being reduced
the reducing agent
always a nonmetal
Q.11
The process of crushing the ore into a powder is called _______.
pulverization
powderation
smelting
calcination
Q.12
What property defines the manner in which various metals will react to cutting tools.
Tensile strength
Strength
Machinability
Finish
Q.13
What property defines a metals ability to withstand twisting, bending, stretching, or deformation without breaking.
Hardness
Brittleness
Ductility
Toughness
Q.14
What occupation is most likely to specialize in the materials science.
Engineers
Metallurgist
Welder
Machinist
Q.15
Which of below is the limitations and disadvantage of powder metallurgy?
pure metal powders are very expensive to produce
wide range of metaal powder like steels,bronze etc
poor plastic properties except good strength and elongation
the geometries are very limit
Q.16
Which of the following is the advantages of powder metallurgy except?
composition of product can be controlled
close dimensional tolerances can be mantained
there are no lost of material
the product has high porosity
Q.17
Powder metallurgy process consist of the following operations, in sequence:
powder production, blending, compaction, sintering
powder production, sintering, compaction, blending
powder production, compaction, blending, sintering
None of these
Q.18
Which one is the third process occur in sintering sequence ?
point bonding
grain boundary
pores
necks
Q.19
This is the pre-alloyed powder used in powder metallurgy, except ?
stainless steel
cooper alloy
high speed steel
aluminum
Q.20
Which one is not the particle shape in powder metallurgy ?
cylindrical
rectangular
spherical
cubic
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