Home > Agricultural Engineering > Quizzes > Farm Machinery Practice Test: Strength of Materials
Farm Machinery Practice Test: Strength of Materials
Fast practice, instant feedback. Timer auto-submits when time’s up.
Avg score: 90% Most missed: “What would be the percent increase in length of wire of diameter 2.5 x I0-3m str…”
Strength of materials, also known as mechanics of materials, is the study of how materials resist applied loads without failure or plastic deformation. It's an engineering discipline that focuses on a material's ability to resist mechanical forces. Strength of materials parameters include: Material strength, Yield strength, Compressive strength, Tensile strength.  A material's strength in a given application depends on many factors, including its resistance to deformation and cracking. It often depends on the shape of the member being designed.  Strength can be classified according to... Show more
Farm Machinery Practice Test: Strength of Materials
Time left 00:00
9 Questions

1. A load of 2 kg resulted an elongation of 1mm in a wire of 3 m length with 1 mm diameter. What will be the Young’s modulus of wire?
2. Steel wire of length 5.7 m and cross-sectional area 3*10-5 m2 is stretched by the same amount as a Copper wire of 3.5 m length and 4*10-5m2 cross-sectional area, under a given load. What would be the ratio of their Young’s modulus?
3. What will be the elastic potential energy per unit volume when a metal wire is suspended along with a suspending weight on it?
4. The length of wire is increased by 8 mm in length, when a weight of 5 kg is hung through it. If all the conditions are kept same, but radius of wire is doubled, what would be the new length of wire?
5. What would be the percent increase in length of wire of diameter 2.5 x I0-3m stretched by a force of 980 N. Young’s modulus of elasticity of wire is 8 x 1010 N/m2.
6. The upper face of a 4cm cube is displaced by 0.1 cm due to a tangential force of 0.8 dyne. What would be the shear modulus of the cube?
7. A force of 106 N/m2 is required for breaking a material of density 3 x 103 kg/m3. What would be the length of wire, which can break by its own weight?
8. A wire is stretched 1 mm by applying a force of 1 KN. How far a wire of same material and the length but of 3 times diameter can be stretched?
9. A material has Poisson’s ratio as 0.5. If a uniform rod of it is subjected by a longitudinal strain of 2 x 10-3, then what would be the percent increase in volume?