MCQOPTIONS
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MCQOPTIONS
This section includes 60 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Rosettes of tempered carbon in the matrix of ferrite are observed in the microstructure of _____ |
| A. | gray cast iron |
| B. | spheroidal cast iron |
| C. | malleable cast iron |
| D. | none of the above |
| Answer» D. none of the above | |
| 52. |
Which of the following elements increase/s chilled depth for chilled cast irons? |
| A. | Silicon |
| B. | Manganese |
| C. | Manganese sulphide |
| D. | All of the above |
| Answer» D. All of the above | |
| 53. |
Which desulphurising agent is used to remove sulphur from iron during melting? |
| A. | Calcium carbide |
| B. | Sodium carbonate |
| C. | Soda ash |
| D. | All of the above |
| Answer» E. | |
| 54. |
What is the effect of increased carbon content on chilled cast iron? |
| A. | Chilling depth increases |
| B. | Hardness of chilled zone increases |
| C. | Both a. and b. |
| D. | None of the above |
| Answer» C. Both a. and b. | |
| 55. |
Which of the following cold working operations are suitable for α brass? |
| A. | Cold rolling |
| B. | Deep drawing |
| C. | Both a. and b. |
| D. | None of the above |
| Answer» D. None of the above | |
| 56. |
Inconol nickel alloy contains _________ |
| A. | 75% Ni, 15% Cr and 9% Fe |
| B. | 75% Ni, 15% Cr and 9% Al |
| C. | 75% Ni, 15% Cr and 9% Mg |
| D. | None of the above |
| Answer» B. 75% Ni, 15% Cr and 9% Al | |
| 57. |
The solubility of tin in copper above 580°C _______ |
| A. | decreases |
| B. | increases |
| C. | remains constant |
| D. | none of the above |
| Answer» B. increases | |
| 58. |
Why is gray cast iron annealed? |
| A. | Graphitize carbide |
| B. | Decrease ductility |
| C. | Both a. and b. |
| D. | None of the above |
| Answer» B. Decrease ductility | |
| 59. |
A bearing material should not possess the characteristic of high ______. |
| A. | coefficient of friction |
| B. | hardness |
| C. | melting point |
| D. | thermal conductivity |
| Answer» B. hardness | |
| 60. |
The alloy of Ti + 5% Al, + 2.5 Sn has _______. |
| A. | low temperature stability |
| B. | low strength |
| C. | good corrosion |
| D. | all of the above |
| Answer» D. all of the above | |