MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Materials and Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
_____________ is a flux used in iron smelting. |
| A. | Silica |
| B. | Caesium |
| C. | Dolomite |
| D. | Mica |
| Answer» D. Mica | |
| 2. |
Which is the iron ore processed in blast furnaces? |
| A. | Hematite |
| B. | Magnesia |
| C. | Alumina |
| D. | Silica |
| Answer» B. Magnesia | |
| 3. |
The smelting zone of the furnace is called as _________ |
| A. | Tuyere |
| B. | Inwall |
| C. | Bosh |
| D. | Hearth |
| Answer» D. Hearth | |
| 4. |
How much manganese does ferromanganese contain? |
| A. | 10-16% |
| B. | 22-32% |
| C. | 45-62% |
| D. | 74-82% |
| Answer» E. | |
| 5. |
Why is sulfur in pig iron kept low? |
| A. | Steel impurity |
| B. | Electrical resistivity |
| C. | Demagnetizing effect |
| D. | Low coefficient of expansion |
| Answer» B. Electrical resistivity | |
| 6. |
How much carbon does pig iron contain? |
| A. | 0.1-1.0% |
| B. | 0.3-0.7% |
| C. | 1-3% |
| D. | 3-4% |
| Answer» E. | |
| 7. |
The size of pig iron is _________ (in inches). |
| A. | 10*6*2 |
| B. | 20*9*4 |
| C. | 15*12*6 |
| D. | 20*14*8 |
| Answer» C. 15*12*6 | |
| 8. |
Impregnation of sintered parts is usually done for _________ |
| A. | 2-5 minutes |
| B. | 10-20 minutes |
| C. | 30-50 minutes |
| D. | 80-120 minutes |
| Answer» C. 30-50 minutes | |
| 9. |
_________ is the process done to reduce the void space in the sintered part. |
| A. | Sizing |
| B. | Coining |
| C. | Machining |
| D. | Infiltration |
| Answer» C. Machining | |
| 10. |
For cemented carbide cutting tools, the compact is heated at __________ |
| A. | 650 F |
| B. | 1200 F |
| C. | 1989 F |
| D. | 2750 F |
| Answer» E. | |
| 11. |
Sintering is performed ___________ |
| A. | At room temperature |
| B. | Below melting point |
| C. | Above boiling point |
| D. | At cryogenic temperature |
| Answer» C. Above boiling point | |
| 12. |
In gravity compaction, the die is made of _________ |
| A. | Graphite |
| B. | Lead |
| C. | Charcoal |
| D. | Quartz |
| Answer» B. Lead | |
| 13. |
Electrolysis usually used for materials like _________ |
| A. | Zinc, cadmium |
| B. | Aluminum, nickel |
| C. | Silver, tin |
| D. | Silicon, antimony |
| Answer» D. Silicon, antimony | |
| 14. |
What is the disadvantage of atomization? |
| A. | Electrical resistivity |
| B. | Oxidation |
| C. | Poor mechanical strength |
| D. | Coarse grains |
| Answer» C. Poor mechanical strength | |
| 15. |
In powder metallurgy, how is the powder for brittle materials prepared? |
| A. | Pulverization |
| B. | Atomization |
| C. | Electrolysis |
| D. | Fusion |
| Answer» B. Atomization | |