MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
In the case of plane strain, the relationship between the fracture toughness and crack extension force is given as _______ (where K is the fracture toughness, is the crack extension force, is the poison s ratio, and E is the young s modulus). |
| A. | K= E |
| B. | K<sup>2</sup>= E/(1- <sup>2</sup>) |
| C. | K=( E)/ |
| D. | K= /E |
| Answer» C. K=( E)/ | |
| 2. |
In the case of plane stress, the relationship between the fracture toughness and crack extension force is given as _______ (where K is the fracture toughness, is the crack extension force, and E is the young s modulus). |
| A. | K= E |
| B. | K<sup>2</sup>= E |
| C. | K=( E)<sup>2</sup> |
| D. | K= /E |
| Answer» C. K=( E)<sup>2</sup> | |
| 3. |
The plane-strain value of critical stress intensity factor KIc is independent of the specimen thickness and describes the fracture toughness of the durable material. Here, in the KIc the I represents _____ |
| A. | mode of fracture |
| B. | number of stress state |
| C. | number of strain state |
| D. | the magnitude of fracture toughness |
| Answer» B. number of stress state | |
| 4. |
In the Crack Opening Mode-I, the extreme case is the thick plate which shows the condition of ____________ |
| A. | plane stress |
| B. | plane strain |
| C. | uniaxial stress |
| D. | uniaxial strain |
| Answer» C. uniaxial stress | |
| 5. |
In the Crack opening Mode-I, the extreme case is the thin plate which shows the condition of ____________ |
| A. | plane stress |
| B. | plane strain |
| C. | uniaxial stress |
| D. | uniaxial strain |
| Answer» B. plane strain | |
| 6. |
In determining the fracture toughness, the Mode-III is defined as the _____________ |
| A. | crack opening mode |
| B. | forward shear mode |
| C. | parallel shear mode |
| D. | perpendicular shear mode |
| Answer» D. perpendicular shear mode | |
| 7. |
In determining the fracture toughness, the Mode-II is defined as the _____________ |
| A. | crack opening mode |
| B. | forward shear mode |
| C. | parallel shear mode |
| D. | perpendicular shear mode |
| Answer» C. parallel shear mode | |
| 8. |
In determining the fracture toughness, the Mode-I is defined as _____________ |
| A. | crack opening mode |
| B. | forward shear mode |
| C. | parallel shear mode |
| D. | perpendicular shear mode |
| Answer» B. forward shear mode | |
| 9. |
The value of the geometric parameter for a plate of width w loaded in tension with the centrally loaded crack of the length 2a __________ |
| A. | [w/2 tan( a/w)]<sup>1/2</sup> |
| B. | [wtan( a/w)]<sup>1/2</sup> |
| C. | [w/2 tan( a/w)] |
| D. | [w/2 ] |
| Answer» B. [wtan( a/w)]<sup>1/2</sup> | |