MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Casting knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following gases can be beneficial in imparting certain desirable qualities to the castings? |
| A. | Oxygen |
| B. | Nitrogen |
| C. | Hydrogen |
| D. | Carbon monoxide |
| Answer» C. Hydrogen | |
| 2. |
Variation in solubility of gases can cause the generation of gases in metal castings. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Which of the following metals has the lowest liquid solubility (cc/kg) of hydrogen at atmospheric pressure? |
| A. | Iron |
| B. | Copper |
| C. | Magnesium |
| D. | Aluminium |
| Answer» E. | |
| 4. |
In the hydrogen removal process, carbon monoxide for ferrous alloys removes not only hydrogen but also nitrogen. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Nitrogen cannot be used for ferrous and nickel based alloys in hydrogen removal technique because_____ |
| A. | it leads to form high dross in metal castings |
| B. | it gives rise to porosity in metal castings |
| C. | it affects the grain size |
| D. | it generates blow holes in metal castings |
| Answer» D. it generates blow holes in metal castings | |
| 6. |
Which of the following formulas show the Sievert s law of percent of hydrogen (H) present in a melt? |
| A. | H = K(pHa)<sup>2</sup> |
| B. | H = K*pHa |
| C. | H = K/pHa |
| D. | H = K pHa |
| Answer» E. | |
| 7. |
Which of the following metals comes in an exothermic group of metals when the solubility of hydrogen is concerned? |
| A. | Iron |
| B. | Titanium |
| C. | Magnesium |
| D. | Nickel |
| Answer» C. Magnesium | |