Fatigue resistance of a material is measured by the

Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the

A

Ultimate tensile strength (U.T.S.)

B

Endurance limit

C

Elastic limit

D

None of these

Resistance to fatigue of a material is measured by

A

Young's modulus

B

Coefficient of elasticity

C

Elastic limit

D

Endurance limit

The resistance to fatigue of a material is measured by

A

Elastic limit

B

Ultimate tensile strength

C

Young's modulus

D

Endurance limit

The yield point in fatigue loading compared to that in static loading is less. The ratio of ultimate tensile strength to endurance limit of a material subjected to fatigue loading is

A

0.5

B

1

C

1.5

D

2

Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

A

Below the yield point

B

Above the yield point

C

Below the elastic limit

D

At the elastic limit

Endurance is a measure of fatigue limit of a metal. Fatigue crack in nitrided machine parts originates

A

At the surface

B

Within the core

C

Just below the surface

D

Anywhere on the surface

The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as

A

Hot piercing

B

Extrusion

C

Cold peening

D

Cold heading

Which of the following is not a characteristic observed in material failure by fatigue fracture ?

A

Plastic deformation of material does not occur

B

Initiation of crack from below the surface does not occur

C

Initation of crack occurs on the surface of the machine part

D

Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface

Failure of a material is called fatigue when it fails

A

At the elastic limit

B

Below the elastic limit

C

At the yield point

D

Below the yield point

When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is

A

0.20

B

0.35

C

0.50

D

0.65

Fatigue resistance of a material is measured by the

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