On decreasing the grain size of a polycrys-talline material, the property most likely to deteriorate is

Chemical Engineering Basics
On decreasing the grain size of a polycrys-talline material, the property most likely to deteriorate is

Fatigue

Tensile strength

Creep

Toughness

Fatigue

Tensile strength

Creep

Toughness

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Chemical Engineering Basics
Materials used for making permanent magnets containing iron and nickel are made by __________ technique.

None of these

Forging

Casting

Powder metallurgy

None of these

Forging

Casting

Powder metallurgy

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Chemical Engineering Basics
Which of the following is an example of stress corrosion ?

Season cracking of brass

Caustic embrittlement of steel

Neither (a) nor (b)

Both (a) & (b)

Season cracking of brass

Caustic embrittlement of steel

Neither (a) nor (b)

Both (a) & (b)

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Chemical Engineering Basics
Hydrogen in liquid steels is dissolved

In the molecular form

In the ionic form

As tiny gas bubbles

In the atomic form

In the molecular form

In the ionic form

As tiny gas bubbles

In the atomic form

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Chemical Engineering Basics
Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

Martensite formation

Retained austenite

Relatively high sulphur content in the base metal

Sufficient hydrogen present in the welding arc

Martensite formation

Retained austenite

Relatively high sulphur content in the base metal

Sufficient hydrogen present in the welding arc

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Chemical Engineering Basics
The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.

None of these

50

100

None of these

50

100

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Chemical Engineering Basics

Chemical Engineering Basics On decreasing the grain size of a polycrys-talline material, the property most likely to deteriorate is

Chemical Engineering Basics Materials used for making permanent magnets containing iron and nickel are made by __________ technique.

Chemical Engineering Basics Which of the following is an example of stress corrosion ?

Chemical Engineering Basics Hydrogen in liquid steels is dissolved

Chemical Engineering Basics Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

Chemical Engineering Basics The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.

Chemical Engineering Basics
On decreasing the grain size of a polycrys-talline material, the property most likely to deteriorate is

Chemical Engineering Basics
Materials used for making permanent magnets containing iron and nickel are made by __________ technique.

Chemical Engineering Basics
Which of the following is an example of stress corrosion ?

Chemical Engineering Basics
Hydrogen in liquid steels is dissolved

Chemical Engineering Basics
Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

Chemical Engineering Basics
The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.