MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
If an annulus has an inner diameter of d 1 and an outer diameter of d 2 then the equivalent diameter is |
| A. | 2 d 2 – d 1 |
| B. | d 2 – 2 d 1 |
| C. | d 1 – d 2 |
| D. | d 2 – d 1 |
| Answer» E. | |
| 2. |
In many flow situations, the duct can be(i) Circular(ii) Rectangle(iii) Trapezoidal(iv) AnnulusIdentify the correct option |
| A. | i and ii |
| B. | i, ii, iii and iv |
| C. | i, ii and iii |
| D. | iii and iv |
| Answer» C. i, ii and iii | |
| 3. |
For a duct of rectangular cross-section with length l and breadth b, the value of d e is |
| A. | l b / l + b |
| B. | 2 l b |
| C. | 2 l b / l + b |
| D. | 4 l b / l + b |
| Answer» D. 4 l b / l + b | |
| 4. |
The characteristic dimension d in the relation R E = V d p/δ is the equivalent diameter and is defined as how many times the cross-sectional flow area divided by the wetted perimeter |
| A. | 7 |
| B. | 4 |
| C. | 1 |
| D. | 6 |
| Answer» C. 1 | |
| 5. |
The nature of the fluid flow is governed by the following parameters(i) Mean flow velocity(ii) Density of fluid(iii) Dynamic viscosity of the fluidIdentify the correct statements |
| A. | i and iii |
| B. | i only |
| C. | i, ii and iii |
| D. | ii and iii |
| Answer» D. ii and iii | |
| 6. |
Following are the characteristics of turbulent flow(i) Eddying(ii) Sinuous(iii) RectilinearIdentify the correct option |
| A. | ii and iii |
| B. | i and iii |
| C. | i, ii and iii |
| D. | i and ii |
| Answer» E. | |
| 7. |
IN_MANY_FLOW_SITUATIONS,_THE_DUCT_CAN_BE?$ |
| A. | Circular |
| B. | Rectangle |
| C. | Trapezoidal |
| D. | Annulus |
| Answer» C. Trapezoidal | |
| 8. |
If_an_annulus_has_an_inner_diameter_of_d_1_and_an_outer_diameter_of_d_2_then_the_equivalent_diameter_is$ |
| A. | 2 d<sub> 2 </sub>– d<sub> 1</sub> |
| B. | d<sub> 2 </sub>– 2 d<sub> 1</sub> |
| C. | d<sub> 1 </sub>– d<sub> 2 </sub> |
| D. | d<sub> 2 </sub>– d<sub> 1</sub> |
| Answer» E. | |
| 9. |
For a duct of rectangular cross-section with length l and breadth b, the value of d e i? |
| A. | l b / l + b |
| B. | 2 l b |
| C. | 2 l b / l + b |
| D. | 4 l b / l + b |
| Answer» D. 4 l b / l + b | |
| 10. |
The characteristic dimension d in the relation R E = V d p/δ is the equivalent diameter and is defined as how many times the cross-sectional flow area divided by the wetted perimeter$ |
| A. | 7 |
| B. | 4 |
| C. | 1 |
| D. | 6 |
| Answer» C. 1 | |
| 11. |
The fluid particles move in flat or curved un-mixing layers or streams and follow a smooth continuous path. This type of flow is known as |
| A. | Steady flow |
| B. | Stream flow |
| C. | Turbulent flow |
| D. | Laminar flow |
| Answer» E. | |
| 12. |
The value of convective coefficient of air in case of free convection is |
| A. | 3-7 W/m<sup>2</sup> K |
| B. | 3-4 W/m<sup>2</sup> K |
| C. | 8-9 W/m<sup>2</sup> K |
| D. | 9-9.5 W/m<sup>2</sup> K |
| Answer» B. 3-4 W/m<sup>2</sup> K | |
| 13. |
The nature of the fluid flow is governed by the following parameters |
| A. | Mean flow velocity |
| B. | Density of fluid |
| C. | Dynamic viscosity of the fluid |
| Answer» D. | |
| 14. |
In which fluid flow, the motion of fluid particles is irregular? |
| A. | Turbulent |
| B. | Laminar |
| C. | One dimensional |
| D. | Two dimensional |
| Answer» B. Laminar | |
| 15. |
How many types of fluid flow are characterized in the realms of fluid mechanics? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |