MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Computational Fluid Dynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
( frac{ partial( rho hat{u})}{ partial t}+ nabla.( rho vec{V} hat{u}) = - nabla. dot{q_s}-p nabla. vec{V}- tau: nabla vec{V}+ dot{q_v} ). This form of the energy equation is applicable to _________ |
| A. | Both Newtonian and non-Newtonian fluids |
| B. | Newtonian fluids |
| C. | Non-Newtonian fluids |
| D. | Pseudo-plastics |
| Answer» B. Newtonian fluids | |
| 2. |
Let ( hat{u} ) be the specific internal energy of a system moving along with the flow with a velocity ( vec{V} ). What is the time rate of change of the total energy of the system per unit mass? |
| A. | ( hat{u}+ frac{1}{2} vec{V}. vec{V} ) |
| B. | ( frac{D}{Dt}( hat{u}+ frac{1}{2} vec{V}. vec{V}) ) |
| C. | ( frac{ partial}{ partial t}( hat{u}+ frac{1}{2} vec{V}. vec{V}) ) |
| D. | ( frac{D}{Dt}( hat{u}+ vec{V}. vec{V}) ) |
| Answer» C. ( frac{ partial}{ partial t}( hat{u}+ frac{1}{2} vec{V}. vec{V}) ) | |
| 3. |
If ( vec{f} ) is the body force of an infinitesimally small element (volume dx dy dz and density ) moving along with the flow (velocity ( vec{V} )), Which term is the work done by the body force? |
| A. | ( vec{f}. vec{V} )dx dy dz |
| B. | ( rho vec{f}. vec{V} ) |
| C. | ( rho vec{f}. vec{V} )dx dy dz |
| D. | ( rho vec{f} )dx dy dz |
| Answer» D. ( rho vec{f} )dx dy dz | |
| 4. |
The energy equation which is in terms of total energy can be changed to terms of internal energy using ___________ |
| A. | momentum equation |
| B. | stress-strain relations |
| C. | equations of state |
| D. | continuity equation |
| Answer» B. stress-strain relations | |
| 5. |
The energy equation which is in terms of temperature can be changed to terms of internal energy using ___________ |
| A. | momentum equation |
| B. | stress-strain relations |
| C. | equations of state |
| D. | continuity equation |
| Answer» D. continuity equation | |
| 6. |
If p and are the net pressure and net shear stress acting on an infinitesimally small element (volume dx dy dz) moving along with the flow (velocity ( vec{V} )), what is the net work done on the system? |
| A. | ( rho ( nabla .(p vec{V} )+ nabla .( . vec{V})) ) |
| B. | (((p vec{V})+( tau. vec{V}))dx ,dy ,dz ) |
| C. | ( rho( nabla.(p vec{V})+ nabla.( tau. vec{V})) dx ,dy ,dz ) |
| D. | (( nabla .(p)+ nabla.( tau))dx ,dy ,dz ) |
| Answer» D. (( nabla .(p)+ nabla.( tau))dx ,dy ,dz ) | |
| 7. |
While converting the energy equation from one form to another, which of the following happens? |
| A. | Either the left-hand side or the right-hand side of the equation changes |
| B. | Both the left-hand side and the right-hand side of the equation change |
| C. | The right-hand side of the equation changes |
| D. | The left-hand side of the equation changes |
| Answer» C. The right-hand side of the equation changes | |