MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A plate 0.3 m long is placed at zero angle of incidence in a stream of 15 degree Celsius water moving at 1 m/s. Find out the maximum value of the normal component of velocity at thr trailing edge of the plate. For water at 15 degree Celsiusp = 998.9 kg /m3µ = 415.85 * 10 -2 kg/hr m |
| A. | 1.6885 * 10 -2 m/s |
| B. | 1.6885 * 10 -3 m/s |
| C. | 1.6885 * 10 -4 m/s |
| D. | 1.6885 * 10 -5 m/s |
| Answer» C. 1.6885 * 10 -4 m/s | |
| 2. |
Air at 25 degree Celsius flows over a flat surface with a sharp leading edge at 1.5 m/s. Find the value of Reynolds number. For air at 25 degree Celsius, kinematic viscosity = 15.53* 10n -6 m2/s |
| A. | 38694 |
| B. | 12846 |
| C. | 48294 |
| D. | 76386 |
| Answer» D. 76386 | |
| 3. |
A plate 0.3 m long is placed at zero angle of incidence in a stream of 15 degree Celsius water moving at 1 m/s. Find out the maximum boundary layer thickness. For water at 15 degree Celsius. For water at 15 degree Celsiusp = 998.9 kg /m3µ = 415.85 * 10 -2 kg/hr m |
| A. | 4.945 m |
| B. | 3.945 m |
| C. | 2.945 m |
| D. | 1.945 m |
| Answer» D. 1.945 m | |
| 4. |
Air at 25 degree Celsius flows over a flat surface with a sharp leading edge at 1.5 m/s. Find the boundary layer thickness at 0.5 from the leading edge. For air at 25 degree Celsius, kinematic viscosity = 15.53* 10n -6 m2/s |
| A. | 4.1376 cm |
| B. | 3.1376 cm |
| C. | 2.1376 cm |
| D. | 1.1376 cm |
| Answer» E. | |
| 5. |
A plate 0.3 m long is placed at zero angle of incidence in a stream of 15 degree Celsius water moving at 1 m/s. Find out the stream wise velocity component at the mid-point of the boundary layer. For water at 15 degree Celsiusp = 998.9 kg /m3µ = 415.85 * 10 -2 kg/hr m |
| A. | 0.736 m/s |
| B. | 0.636 m/s |
| C. | 0.536 m/s |
| D. | 0.436 m/s |
| Answer» B. 0.636 m/s | |
| 6. |
Glycerin at 10 degree Celsius flows past a flat plate at 20 m/s. Workout the velocity components at a point P(x, y) in the fluid flow wherex = 2 m from the leading edge of the platey = 5 cm from the plate surfaceFor glycerin at 10 degree Celsius, kinematic viscosity = 2.79 * 10 -3 m2/s |
| A. | 15.92 m/s and 0.0952 m/s |
| B. | 16.92 m/s and 0.0952 m/s |
| C. | 17.92 m/s and 0.0752 m/s |
| D. | 18.92 m/s and 0.0752 m/s |
| Answer» C. 17.92 m/s and 0.0752 m/s | |
| 7. |
A_PLATE_0.3_M_LONG_IS_PLACED_AT_ZERO_ANGLE_OF_INCIDENCE_IN_A_STREAM_OF_15_DEGREE_CELSIUS_WATER_MOVING_AT_1_M/S._FIND_OUT_THE_MAXIMUM_VALUE_OF_THE_NORMAL_COMPONENT_OF_VELOCITY_AT_THR_TRAILING_EDGE_OF_THE_PLATE._FOR_WATER_AT_15_DEGREE_CELSIUS?$ |
| A. | |
| B. | |
| Answer» C. | |
| 8. |
Air at 25 degree Celsius flows over a flat surface with a sharp leading edge at 1.5 m/s. Find the value of Reynolds number. For air at 25 degree Celsius, kinematic viscosity = 15.53* 10n -6 m2/? |
| A. | 38694 |
| B. | 12846 |
| C. | 48294 |
| D. | 76386 |
| Answer» D. 76386 | |
| 9. |
Boundary layer thickness is given by |
| A. | δ = 5.64 x/ (Re) <sup>½</sup> |
| B. | δ = 5.64 x/ (Re) <sup>½</sup> |
| C. | δ = 6.64 x/ (Re) <sup>½</sup> |
| D. | δ = 7.74 x/ (Re) <sup>½</sup> |
| Answer» B. ‚âà√≠¬¨‚Ä¢ = 5.64 x/ (Re) <sup>¬¨¬®≈í¬©</sup> | |
| 10. |
Shear stress at the middle of the plate is given by |
| A. | T <sub>W</sub> = 0.964 p U <sub>INFINITY </sub><sup>2</sup>/2 (Re) <sup>1/2</sup> |
| B. | T <sub>W</sub> = 0.864 p U <sub>INFINITY </sub><sup>2</sup>/2 (Re) <sup>1/2</sup> |
| C. | T <sub>W</sub> = 0.764 p U <sub>INFINITY </sub><sup>2</sup>/2 (Re) <sup>1/2</sup> |
| D. | T <sub>W</sub> = 0.664 p U <sub>INFINITY </sub><sup>2</sup>/2 (Re) <sup>1/2</sup>. |
| Answer» E. | |
| 11. |
Local skin friction coefficient is given by |
| A. | 0.646/ (Re)<sup> 1/2</sup> |
| B. | 1.646/ (Re)<sup> 1/2</sup> |
| C. | 2.646/ (Re)<sup> 1/2</sup> |
| D. | 3.646/ (Re)<sup> 1/2</sup> |
| Answer» B. 1.646/ (Re)<sup> 1/2</sup> | |
| 12. |
Air at 25 degree Celsius flows over a flat surface with a sharp leading edge at 1.5 m/s. Find the boundary layer thickness at 0.5 from the leading edge. For air at 25 degree Celsius, kinematic viscosity = 15.53* 10n -6 m2/s |
| A. | 4.1376 cm |
| B. | 3.1376 cm |
| C. | 2.1376 cm |
| D. | 1.1376 cm |
| Answer» E. | |
| 13. |
A plate 0.3 m long is placed at zero angle of incidence in a stream of 15 degree Celsius water moving at 1 m/s. Find out the stream wise velocity component at the mid-point of the boundary layer. For water at 15 degree Celsius |
| A. | |
| B. | |
| Answer» B. | |