MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Mass Transfer knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Find the diffusivity of AB in sq.m/sec if N flux of A 5 mol/sq.m sec, concentration difference is 2mol/cu.m and distance is 3 m. |
| A. | 2.5 |
| B. | 5.5 |
| C. | 7.5 |
| D. | 10.5 |
| Answer» D. 10.5 | |
| 2. |
Find the change in concentration for a steady state equimolar counter diffusion if D(AB)= 6 sq.m/sec, the change in distance is 2 m and the N flux of A is 5 mol/sq.m sec. |
| A. | 0.67 |
| B. | 1.67 |
| C. | 2.67 |
| D. | None of the mentioned |
| Answer» C. 2.67 | |
| 3. |
For liquid molecular diffusion of A and B, steady state equimolar counter diffusion the N flux of A is negative of N flux of B. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Find J flux of A ( xA = 0.5) if the total N flux is 6 mol/sq.m sec and N flux of A is 3 mol/sq.m sec. |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 5. |
FIND_THE_CHANGE_IN_CONCENTRATION_FOR_A_STEADY_STATE_EQUIMOLAR_COUNTER_DIFFUSION_IF_D(AB)=_6_SQ.M/SEC,_THE_CHANGE_IN_DISTANCE_IS_2_M_AND_THE_N_FLUX_OF_A_IS_5_MOL/SQ.M_SEC.?$ |
| A. | 0.67 |
| B. | 1.67 |
| C. | 2.67 |
| D. | None of the mentioned |
| Answer» C. 2.67 | |
| 6. |
Find_the_diffusivity_of_AB_in_sq.m/sec_if_N_flux_of_A_5_mol/sq.m_sec,_concentration_difference_is_2mol/cu.m_and_distance_is_3_m.$ |
| A. | 2.5 |
| B. | 5.5 |
| C. | 7.5 |
| D. | 10.5 |
| Answer» D. 10.5 | |
| 7. |
For liquid molecular diffusion of A and B, steady state equimolar counter diffusion the N flux of A is negative of N flux of B? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
For the molecular diffusion of liquids, if the diffusing molecules having criteria of steady state diffusion of B over non diffusing A then the N flux of A is |
| A. | 1 |
| B. | 0 |
| C. | Negative |
| D. | Infinity |
| Answer» C. Negative | |
| 9. |
Diffusivity of the liquids can be determined by |
| A. | Wilke- lee equation |
| B. | Wilke- chan equation |
| C. | Lee and chan equation |
| D. | None of the mentioned |
| Answer» C. Lee and chan equation | |
| 10. |
Find J flux of A ( xA = 0.5) if the total N flux is 6 mol/sq.m sec and N flux of A is 3 mol/sq.m sec. |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 11. |
Find the flux of A ( xA= 0.2) if Total flux is 5 mol/sq.m sec and J flux of A is 2 mol/sq.m sec. |
| A. | 2 |
| B. | 2.5 |
| C. | 3 |
| D. | 3.5 |
| Answer» D. 3.5 | |
| 12. |
Find the total flux for a particle A and B in a steady state if flux of A and B is 2.44 and 4.44 mol/sq.m sec. |
| A. | 2 |
| B. | 4.88 |
| C. | 6.88 |
| D. | 8 |
| Answer» D. 8 | |
| 13. |
Diffusion co-efficient in molecular diffusion is estimated by _________ |
| A. | Daltons law |
| B. | Diffusion law |
| C. | Ficks law |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 14. |
Before collision, the distance between the two particles is mean free path. |
| A. | True |
| B. | False |
| Answer» C. | |