For steel, the ultimate strength in shear as compared to ultimate strength in tension is ___________________?
A. same
B. 1/2
C. 1/3
D. 1/4
E. 2/3
Month: January 2019
Resistance to fatigue of a material is measured by________________?
Resistance to fatigue of a material is measured by________________?
A. Young’s modulus
B. coefficient of elasticity
C. elastic limit
D. ultimate tensile strength
E. endurance limit
The ratio of endurance limit in shear to the endurance limit in flexure is__________________________?
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
E. 0.6
Residual stress in materials_________________?
Residual stress in materials_________________?
A. acts when external load is applied
B. becomes zero when external load is removed
C. is independent of external loads
D. is always harmful
E. is always beneficial
Cold working________________?
Cold working________________?
A. increases the fatigue strength
B. decreases the fatigue strength
C. has no influence on fatigue strength
D. alone has no influence on fatigue strength
E. none of the above
In nitrated parts, the origins of the fatigue cracks will occur at__________________?
In nitrated parts, the origins of the fatigue cracks will occur at__________________?
A. surface
B. just below the surface
C. within the core
D. could occur anywhere
E. none of the above
Which process will increase the fatigue duration of parts ?
Which process will increase the fatigue duration of parts ?
A. finishing and polishing
B. shot-peening
C. decarburisation
D. electroplating
E. all of the above”.
The building up of worn and uridersized parts, subjected to repeated loads by electroplating is_____________________?
The building up of worn and uridersized parts, subjected to repeated loads by electroplating is_____________________?
A. best method
B. extremely hazardous
C. has no effect as regards fatigue strength
D. cheapest method
E. all of the above
Yield point in fatigue loading as compared to static loading is__________________?
Yield point in fatigue loading as compared to static loading is__________________?
A. same
B. higher
C. lower
D. depends on other factors
E. none of the above
The fatigue limit of a material____________________?
The fatigue limit of a material____________________?
A. is greatly decreased by poor surface conditions
B. remains same irrespective of surface conditions
C. depends mainly on core composition
D. is dependent upon yield strength of material
E. none of the above