MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Calculate the shear modulus for steel in GPa, if given that young modulus is 215 GPa and possion s ratio is 0.33? |
| A. | 40 GPa |
| B. | 50 GPa |
| C. | 80 GPa |
| D. | 100 GPa |
| Answer» D. 100 GPa | |
| 2. |
A strain gauge measurement made on the free aluminum surface indicates the principle strains 0.003 and 0.002. What are the principal stresses? (Given that poison s ratio for aluminum=0.33, young modulus = 70 GPa) |
| A. | 1=965 MPa, 2=235 MPa |
| B. | 1=857.8 MPa, 2=125.86 MPa |
| C. | 1=305 MPa, 2=458 MPa |
| D. | 1=287.5 MPa, 2=233.96 MPa |
| Answer» E. | |
| 3. |
In case of plane strain, the strain( 3=0) in one of the principal directions is zero, but the stress is non-zero ( 3 is nonzero) in this direction. 3= _____________ |
| A. | ( 1+ 2) |
| B. | E (1- 2) ( 1+ 2) |
| C. | 1+ 2 |
| D. | {E/(1- 2)} ( 1+ 2) |
| Answer» B. E (1- 2) ( 1+ 2) | |
| 4. |
Which of the following relation is not correct? |
| A. | ={(1-2 )/E}3 m |
| B. | K = E/3(1-2 ) |
| C. | G = E/2(1+ ) |
| D. | = {1+(2G/3K)} / {1- (2G/3K)} |
| Answer» E. | |
| 5. |
Bulk modulus or volumetric modulus of elasticity(K) is equal to ____________ |
| A. | xy / x |
| B. | xy / x |
| C. | m / |
| D. | / m |
| Answer» D. / m | |
| 6. |
Modulus of elasticity defines the relationship between shear stress and shear strain. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
Consider a unit cube subjected to normal stress x, y, z. Assume normal stress does not produce any shear stress on planes x, y, z. What will be the net strain along x direction? |
| A. | 1/E [ x- ( y+ z)] |
| B. | 1/E [ y- ( x+ z)] |
| C. | 1/E [ z- ( y+ x)] |
| D. | 1/E [ x] |
| Answer» B. 1/E [ y- ( x+ z)] | |
| 8. |
For most isotropic metal the value of Poisson s ratio is equal to ___________ |
| A. | 0.5 |
| B. | 1 |
| C. | 0.33 |
| D. | 0 |
| Answer» D. 0 | |
| 9. |
The transverse strain is a constant fraction of the strain in the longitudinal direction. This ratio is known as __________ |
| A. | poisson s ratio |
| B. | pilling-Bedworth ratio |
| C. | concentration ratio |
| D. | reduction ratio |
| Answer» B. pilling-Bedworth ratio | |
| 10. |
The tension force along x-direction produces extension along the x-axis; it also produces contraction in transverse y and z-directions. |
| A. | True |
| B. | False |
| Answer» B. False | |