Powder metallurgy technique is used in the production of __________ tools.

The process of heating the cold pressed metallic powder is called __________ in powder metallurgy.

A

Precipitation

B

Fusion

C

Sintering

D

Agglomeration

Powder metallurgy process does not make metal powder by

A

Atomisation

B

Grinding/milling

C

Hammering

D

Electrolytic deposition

Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of

A

90% tungsten carbide and 10% cobalt

B

70% aluminium oxide & 30% silica

C

30% nickel, 15% chromium & 55% tungsten

D

65% tungsten & 35% zirconium

In 1995 a certain store had 1,800 tools in stock that had been purchased for Tk. 30 each. If 1,000 of these tools were sold in 1995 for Tk. 40 each and the remaining 800 were sold in 1996 for Tk. 50 each, how much greater was the gross profit on the tools sold in 1996 than of 1995?

A

Tk. 0

B

Tk. 6,000

C

Tk. 8,000

D

Tk. 32,000

Powder metallurgy is used to produce

A

High precision components with complex cavities and sharp features

B

Components of large size

C

Porosity free components

D

Components of such alloys whose constituents do not form alloys readily

Powder metallurgy processing can be used for making

A

Dispersion strengthened copper rod

B

Self lubricating bearing and cemented carbide

C

Connecting rod

D

Piston

The operation in which oil is permeated into the pores of a powder metallurgy product is known as

A

Mixing

B

Sintering

C

Impregnation

D

Infiltration

For preparation of porous bearings by powder metallurgy, preferred particle shape is

A

Spherical

B

Nodular

C

Irregular

D

No preferred shape

High speed steel cutting tools operate at cutting speeds _________ than carbon steel tools.

A

2 to 3 times lower

B

2 to 3 times higher

C

5 to 8 times higher

D

8 to 20 times higher

Which of the following allotropes of Carbon is used as a reducing agent in metallurgy?

A

Carbon Black

B

Graphite

C

Charcoal

D

Coke

Powder metallurgy technique is used in the production of __________ tools.

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