| 1. | Which field is set up when a fluid flows past a heated or cold surface? |
| a. | Energy |
| b. | Temperature |
| c. | Mass |
| d. | Time |
| View Answer Report Discuss 50-50! |
|
Answer: (b).Temperature
|
| 2. | The zone or thin layer wherein the temperature field exists is called the |
| a. | Single boundary layer |
| b. | Multi boundary layer |
| c. | Hydrodynamic boundary layer |
| d. | Thermal boundary layer |
| View Answer Report Discuss 50-50! |
|
Answer: (d).Thermal boundary layer
|
| 3. | The thickness of thermal boundary layer is arbitrarily defined as the distance from the plate surface at which |
| a. | t S – t/t S – t INFINITY = 0.34 |
| b. | t S – t/t S – t INFINITY = 0.10 |
| c. | t S – t/t S – t INFINITY = 0.99 |
| d. | t S – t/t S – t INFINITY = 0.87 |
| View Answer Report Discuss 50-50! |
|
Answer: (c).t S – t/t S – t INFINITY = 0.99
|
| 4. | The convection of energy reduces the outward conduction in the fluid so temperature gradient |
| a. | Decreases |
| b. | Increases |
| c. | Constant |
| d. | Becomes twice |
| View Answer Report Discuss 50-50! |
|
Answer: (a).Decreases
|
| 5. | The velocity profile of the hydrodynamic boundary layer is dependent upon |
| a. | Time |
| b. | Viscosity |
| c. | Temperature |
| d. | Mass |
| View Answer Report Discuss 50-50! |
|
Answer: (b).Viscosity
|