Related Questions

The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to
A Static load
B Dynamic load
C Static as well as dynamic load
D Completely reversed load
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
The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of
A 0.45
B 0.55
C 0.65
D 0.75
The ratio of endurance limit in shear to the endurance limit in flexure is
A 0.33
B 0.4
C 0.5
D 0.55
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
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
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 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
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.
A Working
B Damaging
C Allowable
D None of these
If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will
A Have same value as that of standard specimen
B Increase
C Decrease
D None of these

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