MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If Da is diffusivity, CT is tracer concentration and UT is overall heat transfer coefficient, then the pulse tracer balance with dispersion is obtained as ____ |
| A. | \(\frac{∂^2 C_T}{∂z^2} – \frac{∂U_T}{∂z} = \frac{∂C_T}{∂z} \) |
| B. | Da\(\frac{∂^2 C_T}{∂z^2} – \frac{∂U_T}{∂z} =\frac{∂C_T}{∂z} \) |
| C. | Da\(\frac{∂^2 C_T}{∂z^2} + \frac{∂U_T}{∂z} =\frac{∂C_T}{∂z} \) |
| D. | Da\(\frac{∂C_T}{∂z^2} – \frac{∂U_T}{∂z} =\frac{∂C_T}{∂z} \) |
| Answer» B. Da\(\frac{∂^2 C_T}{∂z^2} – \frac{∂U_T}{∂z} =\frac{∂C_T}{∂z} \) | |
| 2. |
The the species continuity equation for the axial dispersion model is ____a) u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (rA)Cb) u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + Cc) \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (rA)Cd) u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (r |
| A. | u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (rA)C |
| B. | u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + C |
| C. | \(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (rA)C |
| D. | u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + (rA) |
| Answer» B. u\(\frac{∂C_A}{∂z} = \frac{∂D_a}{∂z}\frac{∂C_A}{∂z}\) + C | |
| 3. |
Which of the following represents Dispersion number? (Where D is the fluid dispersion coefficient,L is the length of spread of tracer and u is the fluid velocity) |
| A. | \(\frac{L}{uD} \) |
| B. | \(\frac{L}{D} \) |
| C. | \(\frac{D}{uL} \) |
| D. | \(\frac{Lu}{D} \) |
| Answer» D. \(\frac{Lu}{D} \) | |