MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Graduate Aptitude Test (GATE) knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the equation for liquid mass fraction? |
| A. | cα – c0 / cα – cL |
| B. | c0 – cL / cα – cL |
| C. | cα / cα – cL |
| D. | c0 / cα – cL |
| Answer» B. c0 – cL / cα – cL | |
| 2. |
From the figure, the relative fractions of the phases at a given temperature for an alloy composition Co is obtained by the __________ |
| A. | Lever rule |
| B. | Tie line |
| C. | Solidus line |
| D. | Liquidus line |
| Answer» B. Tie line | |
| 3. |
A 53% Ni Cu-Ni alloy is cooled from the liquid state to 1300°C. Calculate the % of liquid and solid at 1300°C. |
| A. | 28, 72 |
| B. | 38, 62 |
| C. | 35, 65 |
| D. | 65, 35 |
| Answer» C. 35, 65 | |
| 4. |
What is used for determination of Phase amounts? |
| A. | Tie line and Temperature–Composition Point |
| B. | Lever line |
| C. | Temperature–Composition Point |
| D. | Pressure |
| Answer» B. Lever line | |
| 5. |
What is α region? |
| A. | Homogeneous liquid solution |
| B. | Semi solid solution |
| C. | Vapor |
| D. | Substitutional solid solution |
| Answer» E. | |
| 6. |
What is XY line? |
| A. | Lever line |
| B. | Tie line |
| C. | Solidus line |
| D. | Liquidus line |
| Answer» C. Solidus line | |
| 7. |
It can be noted that the two substances are soluble in each other in the entire range of compositions in both liquid and solid state. This kind of system is known as ___________ |
| A. | Binary phase system |
| B. | Unary phase system |
| C. | Multiple phase system |
| D. | Isomorphous system |
| Answer» E. | |
| 8. |
The line above which the alloy is liquid is called __________ |
| A. | Solidus line |
| B. | Tie line |
| C. | Liquidus line |
| D. | Lever line |
| Answer» D. Lever line | |
| 9. |
What is % of C by weight in hypo-eutectoid steels? |
| A. | 0.5% |
| B. | 0.7% |
| C. | 0.8% |
| D. | 1.2% |
| Answer» D. 1.2% | |
| 10. |
What is the eutectoid structure of Iron? |
| A. | Cementite |
| B. | Ferrite |
| C. | Pearlite |
| D. | Austentite |
| Answer» D. Austentite | |
| 11. |
Which of the following are Peritectic systems? |
| A. | Pt – Ag |
| B. | Ni-Re |
| C. | Ni – Re, Fe – Ge, Sn-Sb |
| D. | Pt – Ag, Ni – Re, Fe – Ge, Sn-Sb |
| Answer» E. | |
| 12. |
At what temperature, all liquid and αwill convert to β? |
| A. | Eutectic temperature |
| B. | Peritectic temperature |
| C. | Eutectoid temperature |
| D. | Peritectoid temperature |
| Answer» C. Eutectoid temperature | |
| 13. |
A first solid phase results in a second solid plus another third solid phase upon heating during __________ reaction. |
| A. | Eutectoid |
| B. | Peritectic |
| C. | Eutectic |
| D. | Peritectoid |
| Answer» E. | |