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. |
What is the physical statement of mass conservation equation for a finite control volume moving along with the flow? |
| A. | Rate of change of mass inside the control volume = 0 |
| B. | Rate of change of mass inside the control volume = constant |
| C. | Net mass flow through the control surface = Rate of change of mass inside the control volume |
| D. | Net mass flow through the control surface Rate of change of mass inside the control volume |
| Answer» C. Net mass flow through the control surface = Rate of change of mass inside the control volume | |
| 2. |
What is the physical statement of mass conservation equation for a finite control volume fixed in space? |
| A. | Net mass flow through the control surface = constant |
| B. | Rate of change of mass inside the control volume = constant |
| C. | Net mass flow through the control surface = Rate of change of mass inside the control volume |
| D. | Net mass flow through the control surface Rate of change of mass inside the control volume |
| Answer» D. Net mass flow through the control surface Rate of change of mass inside the control volume | |
| 3. |
Consider a model of finite control volume (volume V and surface area) fixed in space with elemental volume dV, vector elemental surface area d ( vec{S} ), density and flow velocity ( vec{V} ). ( rho vec{V}.d vec{S} ) is positive when _____________ |
| A. | The mass flow is outward |
| B. | The mass flow is inward |
| C. | The mass flow is positive |
| D. | The mass flow is negative |
| Answer» B. The mass flow is inward | |
| 4. |
Consider a model of finite control volume (volume V and surface area) moving along the flow with elemental volume dV, vector elemental surface area d ( vec{S} ), density and flow velocity ( vec{V} ). What is the time rate of change of mass inside the control volume? |
| A. | ( iiint_V rho dV ) |
| B. | ( frac{ partial}{ partial t} iiint_V rho dV ) |
| C. | ( frac{D}{Dt} iiint_V rho dV ) |
| D. | dV |
| Answer» D. dV | |
| 5. |
Consider a model of finite control volume (volume V and surface area) fixed in space with elemental volume dV, vector elemental surface area d ( vec{S} ), density and flow velocity ( vec{V} ). What is the mass inside the control volume? |
| A. | ( iint_s rho vec{V}.d vec{S} ) |
| B. | ( iiint_V rho dV ) |
| C. | dV |
| D. | ( frac{ partial}{ partial t} iiint_V rho dV ) |
| Answer» C. dV | |
| 6. |
Consider a model of finite control volume (volume V and surface area S) fixed in space with elemental volume dV, vector elemental surface area d ( vec{S} ), density and flow velocity ( vec{V} ). What is the net mass flow rate out of the surface area? |
| A. | ( iint_V rho vec{V}.dV ) |
| B. | ( rho vec{V}.d vec{S} ) |
| C. | ( iiint_V rho vec{V}.d vec{S} ) |
| D. | ( iint_V rho vec{V}.d vec{S} ) |
| Answer» E. | |
| 7. |
The physical principle behind the continuity equation is __________ |
| A. | Mass conservation |
| B. | Zeroth law of thermodynamics |
| C. | First law of thermodynamics |
| D. | Energy conservation |
| Answer» B. Zeroth law of thermodynamics | |