Stress concentration in static loading is more serious in__________________?
(A) ductile materials
(B) brittle materials
(C) equally serious in both cases
(D) depends on other factors
(D) unpredictable
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be_________________?
(A) same in both cases
(B) 2 times more
(C) 3 times more
(D) 4 times more
(D) unpredictable
The endurance limit of a material with finished surface in comparison to rough surface is_________________?
(A) more
(B) less
(C) same
(D) more or less depending on quantum of load
(D) unpredictable
Brittle coating technique is used for_________________?
(A) determining brittleness
(B) protecting metal against corrosion
(C) protecting metal against wear and tear
(D) experimental stress analysis
(D) non-destructive testing of metals
Other method of reducing shock load in the above case can be_________________?
(A) to decrease length
(B) to increase length
(C) unaffected by length
(D) other factors would decide same
(D) none of the above
Resilience of a material is important, when it is subjected to________________?
(A) combined loading
(B) fatigue
(C) thermal stresses
(D) wear and tear
(D) shock loading
If an unsupported uniform cross sectional elastic bar is subjected to a longitudinal impact from a rigid bob moving with velocity v, then a compressive wave of intensity sc is propagated through the bar as follows______________________?
(A) vpE
(B) vVvF
(C) WpE/2
(D) IvHpE
(D) none of the above, where E = modulus of elasticity and p = mass density
Guest’s theory of failure is applicable for following type of materials_________________?
(A) brittle
(B) ductile
(C) elastic
(D) plastic
(D) tough
The property of a material which enables it to resist fracture due to high impact loads is known as__________________?
(A) elasticity
(B) endurance
(C) strength
(D) toughness
(D) resilience
Stress concentration in cyclic loading is more serious in__________________?
(A) ductile materials
(B) brittle materials
(C) equally serious in both cases
(D) depends on other factors
(D) unpredictable