MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Materials Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Why are bigger sections not used in austempering? |
| A. | Unable to cool |
| B. | Does not fit in working apparatus |
| C. | Decreased strength |
| D. | Cannot be cut |
| Answer» B. Does not fit in working apparatus | |
| 2. |
Which of the following is not a disadvantage of austempering? |
| A. | Needs to be cold worked |
| B. | Needs special bath |
| C. | Can be used for limited steels |
| D. | Can only be used for small sections |
| Answer» B. Needs special bath | |
| 3. |
It is necessary to carry out _________ after martempering. |
| A. | Refining |
| B. | Tempering |
| C. | Surface hardening |
| D. | Cyaniding |
| Answer» C. Surface hardening | |
| 4. |
Austempering forms a _________ structure. |
| A. | Pearlite |
| B. | Bainite |
| C. | Spherodite |
| D. | Cementite |
| Answer» C. Spherodite | |
| 5. |
Martempering is otherwise known as __________ |
| A. | Interrupted quenching |
| B. | Marquenching |
| C. | Austempering |
| D. | Isothermal quenching |
| Answer» C. Austempering | |
| 6. |
Martempering process is usually employed in _________ |
| A. | Alloy steels |
| B. | Cast irons |
| C. | Composites |
| D. | Ceramics |
| Answer» B. Cast irons | |
| 7. |
How can temperature differences between center and surface be prevented? |
| A. | Refined grain structure |
| B. | Cooling to room temperature |
| C. | Hot working |
| D. | Addition of silicon |
| Answer» C. Hot working | |
| 8. |
Quenching of austenite steel for martempering is done using __________ |
| A. | Furnace |
| B. | Still air |
| C. | Cooling tower |
| D. | Hot oil |
| Answer» E. | |