Related Questions

All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain
A Increases very quickly
B Decreases very quickly
C Increases in proportion to stress
D Decreases in proportion to stress
In a tensile test, when the material is stressed beyond elastic limit, the tensile strain __________ as compared to the stress.
A Decreases slowly
B Increases slowly
C Decreases more quickly
D Increases more quickly
Three elastic constants for a completely anisotropic elastic material which follows the Hooke's law are young's modulus, elastic limit stress and yield stress. Which of the following properties is most sensitive to increase in strain rate ?
A Tensile strength
B Elastic limit
C Proportional limit
D Yield strength
A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is
A 0
B 0.33
C 0.44
D 0.25
The total population of 10 countries in the Asian zone is greater than the total population of 11 countries in the European zone. What can we say if one of the countries is dropped from the Asian zone ?
A Total population of the Asian zone will still be greater than the total population of the European zone
B Total population of the European zone will be greater than the total population of the Asian zone
C Total population of both zones will be equal
D We cannot say anything conclusively
In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is
A More
B Less
C Same
D More/less depending on composition
On Dhaka- Sylet highway , 5% of the drives are fined for exceeding the speed limit. However , 80% of the drivers who exceed the speed limit are not fined. What percentage of dirvers on this highway exceed the speed limit?
A 10
B 15
C 20
D 25
A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?
A Steel
B Glass
C Rubber
D Brass
Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)?
A E = 2G (1 + v)
B E = G (1 + v)
C $${\text{E}} = \frac{{{\text{G}}\left( {1 + {\text{v}}} \right)}}{2}$$
D E = 2G (1 + 2v)
A tensile test is performed on a round bar. After fracture, it has been found that the diameter remains approximately same at fracture. The material under test was
A Mild steel
B Cast iron
C Glass
D Copper

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