MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Operations knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is a right match? |
| A. | Static mixer Mortar Pestle |
| B. | Batch type Fluidized mixer |
| C. | Tumbling type V cone blender |
| D. | Continuous type Ribbon blender |
| Answer» D. Continuous type Ribbon blender | |
| 2. |
What is the principle of mixing? |
| A. | Shear force |
| B. | Perpendicular force |
| C. | Gravitational force |
| D. | Centrifugal force |
| Answer» B. Perpendicular force | |
| 3. |
Which of the following is not a disadvantage of tumbler with blades? |
| A. | Large shear force cannot be applied |
| B. | Potential packing |
| C. | Scaling up the process |
| D. | Cleaning the tumbler |
| Answer» B. Potential packing | |
| 4. |
Which of the following is correct about a twin shell blender? |
| A. | The material is loaded approximately 80%-90% by volume |
| B. | Twin shell blenders are U shaped |
| C. | Materials inside undergo tumbling motion when rotated |
| D. | Material is loaded via apex port and emptied through shell hatches |
| Answer» D. Material is loaded via apex port and emptied through shell hatches | |
| 5. |
Which of the following is false about speed of rotation in tumblers? |
| A. | In slow rotation, enough shear is not applied |
| B. | Speed of rotation depends only on size and shape of the tumbler |
| C. | Rapid rotation leads to segregation |
| D. | Tumblers are operated at a critical and optimum speed |
| Answer» C. Rapid rotation leads to segregation | |
| 6. |
Which of the following is correct about the factors affecting mixing of solids? |
| A. | Mixing is independent of the nature of particle surface |
| B. | Difference in particle size can lead to segregation |
| C. | Demixing accelerates when smaller particles have lesser density |
| D. | Particle shape does not affect mixing |
| Answer» C. Demixing accelerates when smaller particles have lesser density | |
| 7. |
Which of the following describes solid-liquid mixing the best? |
| A. | The end result of solid-liquid mixing is always dissolution |
| B. | Solid-liquid mixing suspends coarse solids in the liquids |
| C. | Solid-liquid mixing cannot break lumps of aggregated solids |
| D. | Solid-liquid mixing suspends coarse solids in the liquids and break lumps of aggregated solids |
| Answer» E. | |
| 8. |
Which of the following is the best difference between mixing and blending? |
| A. | Mixing can only be done for a solid-solid system, while blending is done for solid-liquid mixture |
| B. | Mixing is done for liquid-liquid, gas-liquid and solid-liquid systems, while blending is done for solid-solid mixture |
| C. | Bending is done for liquid-liquid and gas-liquid systems, while mixing is done for solid-solid mixture |
| D. | Mixing is done for liquid-liquid and gas-liquid systems, while blending is done for solid-solid mixture |
| Answer» C. Bending is done for liquid-liquid and gas-liquid systems, while mixing is done for solid-solid mixture | |
| 9. |
Which one of the following rightly defines mixing? |
| A. | Mixing converts a homogenous system to a heterogeneous system without adding any materials |
| B. | Mixing converts a heterogeneous system to a homogeneous system without adding any materials |
| C. | Mixing converts a heterogeneous system to a homogeneous system with or without adding any materials |
| D. | Mixing converts a heterogeneous system to a homogeneous system with or without adding any materials |
| Answer» E. | |