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

Powder metallurgy process does not make metal powder by

A

Atomisation

B

Grinding/milling

C

Hammering

D

Electrolytic deposition

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

A

Tungsten carbide

B

High carbon steel

C

High speed steel

D

Drilling

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

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

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

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

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

A

Spherical

B

Nodular

C

Irregular

D

No preferred shape

Gross heating value of coal is __________ the net heating value.

A

Higher than

B

Lower than

C

Same as

D

None of these

Heating wet steam at constant temperature is heating it at constant

A

Volume

B

Pressure

C

Entropy

D

Enthalpy

In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating

A

Decreases with increase in Rankine cycle efficiency

B

Increases with increase in Rankine cycle efficiency

C

Is unaffected by increase in Rankine cycle efficiency

D

None of the above

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

Related Questions