MCQOPTIONS
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MCQOPTIONS
This section includes 427 Mcqs, each offering curated multiple-choice questions to sharpen your Materials Science knowledge and support exam preparation. Choose a topic below to get started.
| 401. |
The stress at which extension of a material takes place more quickly as compared to the increase in load is called ____________ |
| A. | Elastic point |
| B. | Plastic point |
| C. | Breaking point |
| D. | Yielding point |
| Answer» E. | |
| 402. |
Which of these is a non-hoookean material? |
| A. | Steel |
| B. | Rubber |
| C. | Aluminium |
| D. | Copper |
| Answer» C. Aluminium | |
| 403. |
Where in the stress-strain curve, the hooke’s law is valid? |
| A. | Strain hardening region |
| B. | Necking region |
| C. | Elastic range |
| D. | Valid everywhere |
| Answer» D. Valid everywhere | |
| 404. |
The dimension of strain is? |
| A. | LT⁻² |
| B. | N/m² |
| C. | N |
| D. | Dimensionless |
| Answer» E. | |
| 405. |
A rigid beam ABCD is hinged at D and supported by two springs at A and B as shown in the given figure. The beam carries a vertical load P and C. the stiffness of spring at A is 2K and that of B is K.What will be the ratio of forces of spring at A and that of spring at B? |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 1 |
| Answer» C. 2 | |
| 406. |
What is the point P shown on the stress strain curve? |
| A. | Upper yield point |
| B. | Yield plateau |
| C. | Elastic limit |
| D. | Ultimate point |
| Answer» E. | |
| 407. |
What is the point P shown in the stress-strain curve? |
| A. | Lower yield point |
| B. | Elastic limit |
| C. | Proportionality limit |
| D. | Breaking point |
| Answer» E. | |
| 408. |
What is the point shown in the stress strain curve? |
| A. | Elastic limit |
| B. | Lower yield point |
| C. | Yield plateau |
| D. | Lower strain point |
| Answer» C. Yield plateau | |
| 409. |
WHICH_OF_THE_FOLLOWING_HAVE_WELL_DEFINED_GEOMETRICAL_EXTERNAL_SHAPES??$ |
| A. | Amorphous solids |
| B. | Liquids |
| C. | Gases |
| D. | Crystalline solids |
| Answer» E. | |
| 410. |
GREATER_THE_ANGLE_OF_INCLINATION_OF_THE_STRESS_STRAIN_CURVE_LESS_IS_THE_ELASTICITY.?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 411. |
A_body_of_weight_mg_is_hanging_on_a_string_which_extends_in_length_by_l._The_work_done_in_extending_the_string_is$ |
| A. | mgl |
| B. | mgl/2 |
| C. | 2mgl |
| D. | 0 |
| Answer» C. 2mgl | |
| 412. |
Which_of_the_following_is_found_out_by_calculating_the_area_under_the_stress_strain_graph?$ |
| A. | Toughness |
| B. | Hardness |
| C. | Endurance |
| D. | Strength |
| Answer» B. Hardness | |
| 413. |
The term liquid crystal refers to a state that is intermediate betwee? |
| A. | Crystalline solid and amorphous liquid |
| B. | Crystalline solid and vapour |
| C. | Amorphous liquid and its vapour |
| D. | A crystal immersed in a liquid |
| Answer» B. Crystalline solid and vapour | |
| 414. |
Stress strain curve for cemented tungsten carbide is? |
| A. | Hyperbola |
| B. | Parabola |
| C. | A curve |
| D. | Straight line |
| Answer» E. | |
| 415. |
A wire fixed at the upper end stretches by length l by applying a force F. What is the work done in stretching? |
| A. | F/2l |
| B. | Fl |
| C. | 2Fl |
| D. | Fl/2 |
| Answer» E. | |
| 416. |
If the Poisson’s ratio is given as 0.3 and the Young’s modulus is given to 7e10. What will be the value for shear modulus?$ |
| A. | 2.69e10 N/m<sup>2</sup> |
| B. | 3.00e10 N/m<sup>2</sup> |
| C. | 2.59e10 N/m<sup>2</sup> |
| D. | 2.72e10 N/m<sup>2</sup> |
| Answer» B. 3.00e10 N/m<sup>2</sup> | |
| 417. |
A given quantity if an ideal gas is at pressure P and absolute temperature T. What is the isothermal bulk modulus of the gas? |
| A. | 2P/3 |
| B. | P |
| C. | 3P/2 |
| D. | 2P |
| Answer» C. 3P/2 | |
| 418. |
Which of the following can be the value of Poisson’s ratio for an engineering structure?$ |
| A. | 2 |
| B. | 0.4 |
| C. | 29 |
| D. | 100 |
| Answer» C. 29 | |
| 419. |
No material is perfectly elastic. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 420. |
Given the shear modulus(G) for aluminum as 2.4e+10 N/m2 and the shear strain is given as 6e-5. What is the value for shear stress? |
| A. | 13.4e+5 N/m<sup>2</sup> |
| B. | 14.4e+5 N/m<sup>2</sup> |
| C. | 12.4e+5 N/m<sup>2</sup> |
| D. | 13.4e-5 N/m<sup>2</sup> |
| Answer» C. 12.4e+5 N/m<sup>2</sup> | |
| 421. |
An example of a perfectly plastic body is |
| A. | Quartz |
| B. | Crystal |
| C. | Putty |
| D. | Rubber |
| Answer» D. Rubber | |
| 422. |
Which of the following relation is stated by Hooke’s law?$ |
| A. | Stress is directly proportional to stress |
| B. | Stress is inversely proportional to stress |
| C. | Stress is directly proportional to square of stress |
| D. | Stress is inversely proportional to square of stress |
| Answer» B. Stress is inversely proportional to stress | |
| 423. |
Amorphous solids are true solids. |
| A. | True |
| B. | False |
| Answer» C. | |
| 424. |
Strain is a dimensionless quantity. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 425. |
Two wires have the same material and have the same volume. However wire 1 had cross sectional area A and wire 2 has cross sectional area 3A. If the length of wire 1 increases by ∆x on applying force F, how much force is needed to stretch wire 2 by the same amount?$ |
| A. | F |
| B. | 4F |
| C. | 6F |
| D. | 9F |
| Answer» E. | |
| 426. |
What is the unit for stress? |
| A. | N/m<sup>2</sup> |
| B. | Nm<sup>2</sup> |
| C. | N/m |
| D. | Nm |
| Answer» B. Nm<sup>2</sup> | |
| 427. |
Up to which point on the stress-strain curve is Hooke’s law valid? |
| A. | Elastic limit |
| B. | Yield point |
| C. | Proportionality limit |
| D. | Fracture point |
| Answer» D. Fracture point | |