Strength of Materials

51. The materials having same elastic properties in all directions are called

1. ideal materials
2. uniform materials
3. isotropic materials
4. paractical materials
5. elastic materials.

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52. The materials which exhibit the same elastic properties in all directions are called

1. homogeneous
2. inelastic
3. isotropic
4. isentropic
5. visco-elastic.

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53. The maximum strain energy that can be stored in a body is known as

1. impact energy
2. resilience
3. proof resilience
4. modulus of resilience
5. toughness.

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54. The percentage reduction in area of a cast iron specimen during tensile test would be of the order of

1. more than 50%
2. 25—50%
3. 10—25%
4. 5—10%
5. negligible.

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55. The property of a material by virtue of which a body returns to its original, shape after removal of the load is called

1. plasticity
2. elasticity
3. ductility
4. malleability
5. resilience.

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56. The property of a material by virtue of which it can be beaten or rolled into plates is called

1. malleability
2. ductility
3. plasticity
4. elasticity
5. reliability.

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57. The property of a material which allows it to be drawn into a smaller section is called

1. plasticity
2. ductility
3. elasticity
4. malleability
5. drawabihty.

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58. The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to

1. Young's modulus
2. bulk modulus
3. modulus of rigidity
4. modulus of elasticity
5. Poisson's ratio.

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59. The ratio of elongation in a prismatic bar due to its own weight (W) as compared to another similar bar carrying an additional weight (W) will be

1. 01:02
2. 01:03
3. 01:04
4. 01:02.5
5. 1 : 2.25

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60. The ratio of lateral strain to the linear strain within elastic limit is known as

1. Young's modulus
2. bulk modulus
3. modulus of rigidity
4. modulus of elasticity
5. Poisson's ratio.

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