MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
Transformation of hypoeutectic cast iron is applicable for the composition of cast iron of ________ carbon. |
| A. | 2.0-4.3% |
| B. | 4.3% |
| C. | 4.3-5.0% |
| D. | Over 5% |
| Answer» B. 4.3% | |
| 2. |
Heating of 4.8% cast iron at _______ results in the formation of liquid metal. |
| A. | 450oC |
| B. | 650oC |
| C. | 950oC |
| D. | 1450oC |
| Answer» E. | |
| 3. |
Cooling of austenite of eutectoid composition at 723oC results in formation of ________ |
| A. | Ledeburite |
| B. | Sphereoidite |
| C. | Pearlite |
| D. | Bainite |
| Answer» D. Bainite | |
| 4. |
A mixture of austenite and cementite is called ___________ |
| A. | Ferrite |
| B. | Ledeburite |
| C. | Pearlite |
| D. | Bainite |
| Answer» C. Pearlite | |
| 5. |
HEATING_OF_4.8%_CAST_IRON_AT_________RESULTS_IN_THE_FORMATION_OF_LIQUID_METAL.?$ |
| A. | 450<sup>o</sup>C |
| B. | 650<sup>o</sup>C |
| C. | 950<sup>o</sup>C |
| D. | 1450<sup>o</sup>C |
| Answer» E. | |
| 6. |
Transformation of hypoeutectic cast iron is applicable for the composition of cast iron of ________ carbon.$ |
| A. | 2.0-4.3% |
| B. | 4.3% |
| C. | 4.3-5.0% |
| D. | Over 5% |
| Answer» B. 4.3% | |
| 7. |
Cooling of austenite of eutectoid composition at 723oC results in formation of _______? |
| A. | Ledeburite |
| B. | Sphereoidite |
| C. | Pearlite |
| D. | Bainite |
| Answer» D. Bainite | |
| 8. |
A mixture of austenite and cementite is called __________? |
| A. | Ferrite |
| B. | Ledeburite |
| C. | Pearlite |
| D. | Bainite |
| Answer» C. Pearlite | |
| 9. |
Slow cooling of hypereutectoid steel results in formation of __________ |
| A. | Proeutectoid cementite |
| B. | Posteutectoid cementite |
| C. | Proeutectoid ferrite |
| D. | Proeutectoid austenite |
| Answer» B. Posteutectoid cementite | |
| 10. |
Cooling of hypoeutectoid steel post heating forms __________ ferrite. |
| A. | Proeutectoid |
| B. | Posteutectoid |
| C. | Hypereutectoid 2.08% |
| D. | Mild eutectoid |
| Answer» B. Posteutectoid | |
| 11. |
Transformation in eutectoid steels is named as _________ |
| A. | Austenitizing |
| B. | Carburizing |
| C. | Decarburizing |
| D. | Nitriding |
| Answer» B. Carburizing | |
| 12. |
Eutectoid steel is heated at __________ |
| A. | 150<sup>o</sup>C |
| B. | 450<sup>o</sup>C |
| C. | 750<sup>o</sup>C |
| D. | 950<sup>o</sup>C |
| Answer» D. 950<sup>o</sup>C | |
| 13. |
How much carbon does hypoeutectoid steel contain? |
| A. | <0.8% |
| B. | 0.8% |
| C. | >0.8% |
| D. | 8% |
| Answer» B. 0.8% | |
| 14. |
Steels containing 0.8% C are called ________ |
| A. | Eutectoid |
| B. | Hypoeutectoid |
| C. | Hypereutectoid |
| D. | Mild eutectoid |
| Answer» B. Hypoeutectoid | |
| 15. |
Composition up to 0.008% carbon is considered as _________ |
| A. | Pure iron |
| B. | Steel |
| C. | Cast iron |
| D. | Annealed steel |
| Answer» B. Steel | |