MCQOPTIONS
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MCQOPTIONS
This section includes 6 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. |
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 ρ and flow velocity \(\vec{V}\).\(\rho\vec{V}.d\vec{S}\) is positive when _____________ |
| A. | fixed in space with elemental volume dV, vector elemental surface area d\(\vec{S}\), density ρ 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 | |
| 3. |
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 ρ and flow velocity \(\vec{V}\). What is the time rate of change of mass inside the control volume? |
| A. | moving along the flow with elemental volume dV, vector elemental surface area d\(\vec{S}\), density ρ 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. | ρdV |
| Answer» D. ρdV | |
| 4. |
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 ρ and flow velocity \(\vec{V}\). What is the mass inside the control volume? |
| A. | fixed in space with elemental volume dV, vector elemental surface area d\(\vec{S}\), density ρ 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. | ρdV |
| D. | \(\frac{\partial}{\partial t} \iiint_V\rho dV\) |
| Answer» C. ρdV | |
| 5. |
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 ρ 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. | |
| 6. |
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 | |