Powder Processing - Manufacturing Processes I - Production & Industrial Engineering Previous Year Questions

1

2009 · Production & Industrial Engineering · Manufacturing Processes I · Powder Processing

Production & Industrial Engineering (PI) 2009

Which of the following processes is used to manufacture products with controlled porosity ?

A

Casting

B

Welding

C

Forming

D

Powder metallurgy

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2

2009 · Production & Industrial Engineering · Manufacturing Processes I · Powder Processing

Production & Industrial Engineering (PI) 2009

Following are some possible characteristics of a pile of powder mixture:
P. Low inter particle friction
Q. High inter particle friction
R. Low porosity
S. High porosity
If the angle of repose for a pile of powder mixture is low, it will exhibit

A

P and R

B

P and S

C

Q and S

D

Q and R

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3

2010 · Production & Industrial Engineering · Manufacturing Processes I · Powder Processing

Production & Industrial Engineering (PI) 2010

In powder metallurgy, sintering of a component

A

improves strength and reduces hardness

B

reduces brittleness and improves strength

C

improves hardness and reduces toughness

D

reduces porosity and increases brittleness

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4

2011 · Production & Industrial Engineering · Manufacturing Processes I · Powder Processing

Production & Industrial Engineering (PI) 2011

Which of the following powder production methods produces spongy and porous particles?

A

Atomization

B

Reduction of metal oxides

C

Electrolytic deposition

D

Pulverization

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5

2014 · Production & Industrial Engineering · Manufacturing Processes I · Powder Processing

Production & Industrial Engineering (PI) 2014

Which one of the following methods is NOT used for producing metal powders?

A

Atomization

B

Compaction

C

Machining and grinding

D

Electrolysis

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6

2016 · Production & Industrial Engineering · Manufacturing Processes I · Powder Processing

Production & Industrial Engineering (PI) 2016

In powder metallurgy, sintering of the component

A

increases density and reduces ductility.

B

increases porosity and reduces density.

C

increases density and reduces porosity.

D

increases porosity and reduces brittleness.

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7

2017 · Production & Industrial Engineering · Manufacturing Processes I · Powder Processing

Production & Industrial Engineering (PI) 2017

In powder metallurgy, the process ‘atomization’ refers to a method of

A

producing powders

B

compaction of powders

C

sintering of powder compacts

D

blending of metal powders

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8

2018 · Production & Industrial Engineering · Manufacturing Processes I · Powder Processing

Production & Industrial Engineering (PI) 2018

Which one of the following processes is NOT used for producing powders?

A

Atomization

B

Ball milling

C

Sintering

D

Electrolysis

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9

2020 · Production & Industrial Engineering · Manufacturing Processes I · Powder Processing

Production & Industrial Engineering (PI) 2020

In manufacturing of self-lubricating bearings by powder metallurgy, an important secondary operation that is carried out after sintering is

A

Cold isostatic pressing

B

Hot isostatic pressing

C

Impregnation

D

Infiltration

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10

2022 · Production & Industrial Engineering · Manufacturing Processes I · Powder Processing

Production & Industrial Engineering (PI) 2022

Match the processing steps related to production of powder metallurgy parts with their descriptions.

A

P-1, Q-5, R-2, S-3

B

P-3, Q-2, R-1, S-5

C

P-2, Q-3, R-1, S-4

D

P-2, Q-5, R-1, S-4

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11

2026 · Production & Industrial Engineering · Manufacturing Processes I · Powder Processing

Production and Industrial Engineering (PI) 2026

Iron powder produced by gas atomization has a tap density and an apparent density of 3.26 g/cm³ and 2.66 g/cm³, respectively. The density of solid iron is 7.85 g/cm³.
Which ONE of the following options is the closest approximation to the degree of densification (in percentage) of this iron powder?

A

41.52

B

81.59

C

33.89

D

75.41

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