MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Behaviour knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the cross section of izod test specimen? |
| A. | 10×10 mm |
| B. | 10×12 mm |
| C. | 12×12 mm |
| D. | 8×10 mm |
| Answer» B. 10×12 mm | |
| 2. |
Which statement is false according to impact strength? |
| A. | Notch serves as a stress concentration zone |
| B. | Lowering the temperature reduces the impact strength in BCC materials |
| C. | Generally, strong metals have a lower impact strength |
| D. | In polymers, impact strength keeps on the increase with temperature |
| Answer» E. | |
| 3. |
Ductile-brittle transition temperature increases with strain rate. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
WHICH_STATEMENT_IS_FALSE_ACCORDING_TO_IMPACT_STRENGTH??$ |
| A. | Notch serves as a stress concentration zone |
| B. | Lowering the temperature reduces the impact strength in BCC materials |
| C. | Generally, strong metals have a lower impact strength |
| D. | In polymers, impact strength keeps on the increase with temperature |
| Answer» E. | |
| 5. |
What_is_the_cross_section_of_izod_test_specimen?$ |
| A. | 10√ó10 mm |
| B. | 10√ó12 mm |
| C. | 12√ó12 mm |
| D. | 8√ó10 mm |
| Answer» B. 10‚Äö√†√∂‚àö‚â•12 mm | |
| 6. |
Ductile-brittle transition temperature increases with strain rate? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
Brittle fracture needs more energy than the ductile fracture. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
Cleavage in bcc materials take place along ___ plane. |
| A. | {001} |
| B. | {110} |
| C. | {123} |
| D. | {112} |
| Answer» B. {110} | |
| 9. |
What is izod impact energy of poly-carbonates? |
| A. | 53 J/m |
| B. | 10-50 J/m |
| C. | 430-850 J/m |
| D. | 12-20 J/m |
| Answer» D. 12-20 J/m | |
| 10. |
Which factor increases impact toughness? |
| A. | Cold working |
| B. | Precipitation hardening |
| C. | Water absorption in polymer |
| D. | Notches |
| Answer» D. Notches | |
| 11. |
What is Izod impact energy of Nylon 6/6? |
| A. | 10-50 J/m |
| B. | 12-20 J/m |
| C. | 50-100 J/m |
| D. | 100-210 J/m |
| Answer» D. 100-210 J/m | |
| 12. |
Moisture absorption causes ___ in impact strength and ___ in the strength of polymers. |
| A. | Increase, Increase |
| B. | Increase, decrease |
| C. | Decrease, Increase |
| D. | Decrease, decrease |
| Answer» C. Decrease, Increase | |
| 13. |
_____ is the ability of a material to sustain impact forces without fracture. |
| A. | Impact strength |
| B. | Toughness |
| C. | Tensile strength |
| D. | Compressive strength |
| Answer» B. Toughness | |