MCQOPTIONS
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MCQOPTIONS
This section includes 125 Mcqs, each offering curated multiple-choice questions to sharpen your BITSAT knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
A streamline is defined as the line ______. |
| A. | Parallel to central axis flow |
| B. | Parallel to outer surface to pipe |
| C. | Of equal velocity in a flow |
| D. | Along with the pressure drop is uniform |
| Answer» D. Along with the pressure drop is uniform | |
| 102. |
Consider the two-dimensional velocity field given by \(\vec V = \left( {5 + {a_1}x + {b_1}y} \right)\hat i + \left( {4{a_2}x + {b_2}y} \right)\hat j,\) where a1, b1, a2 and b2 Are constants. Which one of the following conditions needs to be satisfied for the flow to be incompressible? |
| A. | a1 + b1 = 0 |
| B. | a1 + b2 = 0 |
| C. | a2 + b2 = 0 |
| D. | a2 + b1 = 0 |
| Answer» C. a2 + b2 = 0 | |
| 103. |
If a flow velocity field is given by \(V = 2{x^3}\hat i + 6{x^2}y\hat j\) : |
| A. | flow is three dimensional |
| B. | flow is physically possible and rotational |
| C. | flow is physically possible and irrotational |
| D. | flow is physically not possible |
| Answer» E. | |
| 104. |
A two dimensional flow has velocities in x and y directions given by u = 2 xyt and v = -y2t, where t denotes time. The equation for streamline passing through x = 1, y = 1 is |
| A. | x2y = 1 |
| B. | x2y2 = 1 |
| C. | x/y2 = 1 |
| D. | xy2 = 1 |
| Answer» E. | |
| 105. |
If the velocity of flow at a particular point or at a section does NOT change with respect to time, then the flow is known as: |
| A. | steady flow |
| B. | unsteady flow |
| C. | laminar flow |
| D. | turbulent flow |
| Answer» B. unsteady flow | |
| 106. |
A vortex flow is |
| A. | rotational flow |
| B. | irrotational flow |
| C. | both 1 and 2 |
| D. | free shear flow |
| Answer» D. free shear flow | |
| 107. |
Consider steady, incompressible and irrotational flow through a reducer in a horizontal pipe where the diameter is reduced from 20 cm to 10 cm. The pressure in the 20 cm pipe just upstream of the reducer is 150 kPa. The fluid has a vapor pressure of 50 kPa and a specific weight of 5 kN/m3. Neglecting frictional effects, the maximum discharge (in m3/s) that can pass through the reducer without causing cavitation is |
| A. | 0.05 |
| B. | 0.16 |
| C. | 0.27 |
| D. | 0.38 |
| Answer» C. 0.27 | |
| 108. |
A line source of strength 15 π m/s is situated within a uniform stream flowing at – 12 m/s (i.e. right to left). At a distance of 0.6 m downstream from the source is an equal sink. How far will the stagnation points be from the nearest source/sink? |
| A. | 0.38 m |
| B. | 0.46 m |
| C. | 0.52 m |
| D. | 0.58 m |
| Answer» B. 0.46 m | |
| 109. |
Density of fluid changes from point to point in which of the following type of flow? |
| A. | Laminar flow |
| B. | Uniform flow |
| C. | Compressible flow |
| D. | Turbulent flow |
| Answer» D. Turbulent flow | |
| 110. |
A two dimensional velocity field is given byV = (x2 – y2 + x) i – (2xy – y) jThe convective acceleration at (x, y) = (1, 2) is |
| A. | 0 |
| B. | 14 units |
| C. | 2 units |
| D. | None of the above |
| Answer» E. | |
| 111. |
A velocity potential function exists only for |
| A. | Steady flow |
| B. | Uniform flow |
| C. | Irrotational flow |
| D. | Compressible flow |
| Answer» D. Compressible flow | |
| 112. |
Fluid velocity along a streamline is given by \(V = \left( {{V_0}xt} \right)\hat i\). Its acceleration will be given by: |
| A. | \({V_0}x + V_0^2x{t^2}\) |
| B. | \({V_0}x\) |
| C. | \(V_0^2{t^2}\) |
| D. | \({V_0}x + {V_0}x{t^2}\) |
| Answer» B. \({V_0}x\) | |
| 113. |
A plane flow has velocity components \({\rm{u}} = \frac{{\rm{x}}}{{{{\rm{T}}_1}}}\), \({\rm{v}} = - \frac{{\rm{y}}}{{{{\rm{T}}_2}}}\)and w = 0 along x, y and z directions respectively, where T1 (≠ )0 and T2 ≠ )0( are constants having the dimension of time. The given flow is incompressible if |
| A. | T1 = - T2 |
| B. | \({{\rm{T}}_1} = - \frac{{{{\rm{T}}_2}}}{2}\) |
| C. | \({{\rm{T}}_1} = \frac{{{{\rm{T}}_2}}}{2}\) |
| D. | T1 = T2 |
| Answer» E. | |
| 114. |
For a two dimensional, incompressible flow having velocity components u and v in the x and y directions, respectively, the expression \(\frac{\delta(u^2)}{\delta x} + \frac{\delta(uv)}{\delta y}\) can be simplified to |
| A. | \(u \frac{\delta u}{\delta x} + u \frac{ \delta v}{\delta y}\) |
| B. | \(u \frac{\delta u}{\delta x} + v \frac{ \delta u}{\delta y}\) |
| C. | \(2u \frac{\delta u}{\delta x} + u \frac{ \delta v}{\delta y}\) |
| D. | \(2u \frac{\delta u}{\delta x} + v \frac{ \delta u}{\delta y}\) |
| Answer» C. \(2u \frac{\delta u}{\delta x} + u \frac{ \delta v}{\delta y}\) | |
| 115. |
A steam function is given by:Ψ = 2x2y + (x + 1)y2The flow rate across a line joining points A (3, 0) and B (0, 2) is |
| A. | 0.4 Units |
| B. | 1.1 Units |
| C. | 5.0 Units |
| D. | 4.0 Units |
| Answer» E. | |
| 116. |
In a two-dimensional flow, a stream line shall be interpreted as: |
| A. | they are not contours of an impervious two-dimensional body |
| B. | flow is constant in the direction normal to the flow |
| C. | at the edge, velocity vector is normal to the flow |
| D. | a curve such that velocity vector is always tangential and there is no flow in the direction normal to it |
| Answer» E. | |
| 117. |
A velocity potential function exists when the flow is: |
| A. | rotational |
| B. | tangential |
| C. | parallel |
| D. | irrotational |
| Answer» E. | |
| 118. |
If the stream function is given by ψ = 3xy then the velocity at a point (2, 3) will be |
| A. | 7.21 unit |
| B. | 18 unit |
| C. | 10.82 unit |
| D. | 54 unit |
| Answer» D. 54 unit | |
| 119. |
An open cylindrical vessel of 20 cm diameter and 100 cm long contains water up to a height of 80 cm. What will be the rotational speed of the vessel about its vertical axis such that no water spills? [ g = 10 m/s2] |
| A. | 10√2 rad/s |
| B. | 20√2 rad/s |
| C. | 30√2 rad/s |
| D. | 40√2 rad/s |
| Answer» C. 30√2 rad/s | |
| 120. |
In a steady flow of a fluid, the total acceleration of any fluid particle ________. |
| A. | Can be zero |
| B. | Is never zero |
| C. | Is always zero |
| D. | Is independent of co - ordinates |
| Answer» B. Is never zero | |
| 121. |
The SI unit of pressure is |
| A. | Pascals |
| B. | Ohms |
| C. | Watts |
| D. | Joules |
| Answer» B. Ohms | |
| 122. |
The distance in the specified direction is termed as |
| A. | Uni-directional Distance |
| B. | Directional Distance |
| C. | Directional Displacement |
| D. | Displacement |
| Answer» E. | |
| 123. |
The SI Unit for mass is |
| A. | Ounces |
| B. | Newton |
| C. | Kilogram |
| D. | Stones |
| Answer» D. Stones | |
| 124. |
The liquid widely used in the thermometer is |
| A. | Lime |
| B. | Water |
| C. | Mercury |
| D. | Copper (II) Sulphate |
| Answer» D. Copper (II) Sulphate | |
| 125. |
The steam point is equal to 100 °C, which is equal to |
| A. | −173 K |
| B. | −373 K |
| C. | 173 K |
| D. | 373 K |
| Answer» E. | |