MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Powder Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Why carbide balls are preferred over steel balls in wet milling? |
| A. | Economy purpose |
| B. | Higher iron pick-up |
| C. | Faster production rate |
| D. | Higher carbon pick-up |
| Answer» C. Faster production rate | |
| 2. |
Which of the following phases occur during sintering in WC powder due to carbon deficiency? |
| A. | α, β, γ phase |
| B. | θ, η, K – phase |
| C. | δ, θ, η phase |
| D. | β, γ, M – phase |
| Answer» C. δ, θ, η phase | |
| 3. |
WC is produced by carburization of metallic W powders prepared by the reduction of _______ |
| A. | Scheelite |
| B. | Wolframite |
| C. | Tungstic acid |
| D. | Limonite |
| Answer» D. Limonite | |
| 4. |
In hard metal industry, the carbide of _____ is produced by the direct metal-carbon reaction. |
| A. | Tantalum |
| B. | Titanium |
| C. | Molybdenum |
| D. | Niobium |
| Answer» D. Niobium | |
| 5. |
Recarburization is often necessary for carbide produced by the reaction of metal oxide with carbon. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
The principle constituents of sintered hard metals are the ______ and _______ |
| A. | Metal, reinforcement |
| B. | Metal, carbide powder |
| C. | Non-metal, carbide powder |
| D. | Non-metal, boride powder |
| Answer» C. Non-metal, carbide powder | |
| 7. |
Widia is a trade name of which cemented carbide? |
| A. | WC-Co |
| B. | WC |
| C. | Co-Cr |
| D. | Co-Ni-Cr |
| Answer» B. WC | |
| 8. |
The modern production of hard metal is attributed to ________ |
| A. | Kieffer |
| B. | Schroter |
| C. | Schwarzkopf |
| D. | Osram Studiegesellschaft |
| Answer» C. Schwarzkopf | |
| 9. |
Cemented carbides are commonly known as ‘Hard Metals’. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
______ enables us to shape a larger metallic object by removing a part or thin layer of the metal from its surface to the required shape. |
| A. | Electrical contact materials |
| B. | Bearing materials |
| C. | Tool materials |
| D. | Sintered Friction materials |
| Answer» D. Sintered Friction materials | |