MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Farm Machinery knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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? |
| A. | ( frac{1}{2} ) |
| B. | ( frac{1}{32} ) |
| C. | ( frac{1}{16} ) |
| D. | ( frac{1}{9} ) |
| Answer» E. | |
| 2. |
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? |
| A. | 2 |
| B. | 0 |
| C. | 9 |
| D. | 10 |
| Answer» C. 9 | |
| 3. |
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? |
| A. | 2 dyne/cm<sup>2</sup> |
| B. | 1.3 dyne/cm<sup>2</sup> |
| C. | 2.5 dyne/cm<sup>2</sup> |
| D. | 5 dyne/cm<sup>2</sup> |
| Answer» B. 1.3 dyne/cm<sup>2</sup> | |
| 4. |
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? |
| A. | 2.3:1.9 |
| B. | 1.5:1.5 |
| C. | 1.6:1.8 |
| D. | 2.2:1.3 |
| Answer» E. | |
| 5. |
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? |
| A. | 2mm |
| B. | 4mm |
| C. | 6mm |
| D. | 8mm |
| Answer» B. 4mm | |
| 6. |
What will be the elastic potential energy per unit volume when a metal wire is suspended along with a suspending weight on it? |
| A. | Y<sup>2</sup> |
| B. | ( frac{1}{2} ) Y <sup>2</sup> |
| C. | 4Y |
| D. | 8Y<sup>2</sup> <sup>2</sup> |
| Answer» C. 4Y | |
| 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? |
| A. | 43 m |
| B. | 98 m |
| C. | 85m |
| D. | 34 m |
| Answer» E. | |
| 8. |
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. |
| A. | 0.129 |
| B. | 0.364 |
| C. | 0.249 |
| D. | 0.098 |
| Answer» D. 0.098 | |
| 9. |
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? |
| A. | 7.484*10<sup>10</sup> Pa |
| B. | 9.484*10<sup>10</sup> Pa |
| C. | 6.317*10<sup>10</sup> Pa |
| D. | 7.484*10<sup>20</sup> Pa |
| Answer» B. 9.484*10<sup>10</sup> Pa | |