MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
Which of the following characteristics does irregular shaped particles do not possess? |
| A. | Reduced apparent density |
| B. | Good pressing properties |
| C. | Good sintering properties |
| D. | Maximum flow rate |
| Answer» E. | |
| 2. |
The shape factor is given by the ratio of surface area to particle size. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The adsorption method used for determining the specific surface makes use of which instrument? |
| A. | Fisher Sub-siever |
| B. | BET apparatus |
| C. | Hall Flowmeter |
| D. | Scott Volumeter |
| Answer» C. Hall Flowmeter | |
| 4. |
Carman s equation is given by S0= _____ |
| A. | ( frac{ sqrt{(g/k)K gamma epsilon^3}}{ sqrt{(1- epsilon)^2}} ) |
| B. | ( frac{ sqrt{(g/k)K gamma epsilon^2}}{ sqrt{(1- epsilon)^2}} ) |
| C. | ( frac{ sqrt{(g/k)K gamma epsilon^3}}{ sqrt{(1+ epsilon)^2}} ) |
| D. | ( frac{ sqrt{(k/g)K gamma epsilon^3}}{ sqrt{(1- epsilon)^2}} ) |
| Answer» B. ( frac{ sqrt{(g/k)K gamma epsilon^2}}{ sqrt{(1- epsilon)^2}} ) | |
| 5. |
The unit for measuring the specific surface of the powder is _____ |
| A. | cm<sup>2</sup>/gm |
| B. | cm/sec |
| C. | cm<sup>3</sup>/gm |
| D. | cm/gm<sup>2</sup> |
| Answer» B. cm/sec | |
| 6. |
_____ measures the resistance to fluid flow through a compacted powder bed to calculate the specific surface of the powder. |
| A. | Permeametry |
| B. | Gas adsorption method |
| C. | Elutriation Method |
| D. | Sedimentation method |
| Answer» B. Gas adsorption method | |
| 7. |
______ determines the surface area of powder by measuring the amount of gas adsorbed by a monomolecular layer of the powder. |
| A. | Centrifugal method |
| B. | Gas absorption method |
| C. | Gas adsorption method |
| D. | Permeability method |
| Answer» D. Permeability method | |
| 8. |
Which of the following particle shape is not produced by the chemical decomposition process of powder manufacture? |
| A. | Acicular |
| B. | Flaky (large and thin plate-like) |
| C. | Rod-like (irregular) |
| D. | Rounded |
| Answer» C. Rod-like (irregular) | |
| 9. |
Which method cannot be used to determine the particle shape? |
| A. | Sieve analysis |
| B. | Optical microscopy |
| C. | SEM |
| D. | TEM |
| Answer» B. Optical microscopy | |
| 10. |
Which of the following criteria can be used for shape characterization? |
| A. | Verbal expression and evaluation of bulk properties |
| B. | Shape factor |
| C. | Verbal expression, shape factor, and evaluation of bulk properties |
| D. | Shape factor, shape generation, verbal expression, and bulk property evaluation |
| Answer» E. | |
| 11. |
Particle shape can be defined as, the recognized pattern of relationship between points that form the internal surface of the particle. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Which of the following concepts are used to differentiate and describe particle shapes? |
| A. | Dimensionality of particle |
| B. | Dimensionality and Surface contour |
| C. | Surface contour of particle |
| D. | Dimensionality and atomic mass |
| Answer» C. Surface contour of particle | |