question_answer1) Hydrodynamic and thermal boundary layer thickness are equal for Prandtl number:
A) Equal to zero done clear
B) Less than 1 done clear
C) Equal to 1 done clear
D) More than 1 done clear
View Solution play_arrowquestion_answer2) In a rotameter as the flow rate increases, the float:
A) Rotates at higher speed done clear
B) Rotates at lower speed done clear
C) Rises in the tube done clear
D) Drops in the tube done clear
View Solution play_arrowA) \[2\,{{\text{m}}^{\text{2}}}\text{/s}\] done clear
B) \[2\,{{\text{m}}^{3}}\text{/s}\] done clear
C) \[10\,{{\text{m}}^{3}}\text{/s}\] done clear
D) \[20\,{{\text{m}}^{3}}\text{/s}\] done clear
View Solution play_arrowquestion_answer4) Match the following:
List-I | List-II | ||
A. | Circular sewer maximum discharge | 1. | Y= 0.938 D |
B. | Maximum velocity in circular sewer | 2. | Y=0.81 D |
C. | Triangular Channel | 3. | \[{{y}_{c}}=\frac{4}{5}\,E,\] \[\frac{v_{c}^{2}}{2g}=\frac{{{y}_{c}}}{4}\] |
D. | Bourdon gauge | 4. | \[{{y}_{c}}=\frac{2}{3}\,E,\] \[\frac{v_{c}^{2}}{2g}=\frac{{{y}_{c}}}{4}\] |
A) A\[\to \]4, B\[\to \]3, C\[\to \]2, D\[\to \]1 done clear
B) A\[\to \]3, B\[\to \]4, C\[\to \]1, D\[\to \]2 done clear
C) A\[\to \]2, B\[\to \]3, C\[\to \]1, D\[\to \]4 done clear
D) A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]3 done clear
View Solution play_arrowquestion_answer5) Aging of pipe implies:
A) Pipe becoming smoother with time done clear
B) Relative roughness decreasing periodically done clear
C) Increase in absolute roughness periodically with time done clear
D) Increase in absolute roughness linearly with time done clear
View Solution play_arrowA) 100 m done clear
B) 10 m done clear
C) \[\sqrt{10}\,m\] done clear
D) \[\frac{1}{\sqrt{10}}\] done clear
View Solution play_arrowquestion_answer7) Laminar sub-layer may develop during flow over a flat-plate. It exists in:
A) Laminar zone done clear
B) Transition zone done clear
C) Turbulent zone done clear
D) Laminar and transition zone done clear
View Solution play_arrowA) The flow does not satisfy the continuity equation done clear
B) The flow is rotational done clear
C) The flow is irrotational done clear
D) None of the above done clear
View Solution play_arrowA) 0.04 m/s done clear
B) 0.2 m/s done clear
C) 5.0 m/s done clear
D) 25.0 m/s done clear
View Solution play_arrowquestion_answer10) In which of the following cases frictional drag is predominating?
1. Tennis ball |
2. Parachute |
3. Arrow |
4. Cyclist |
A) 1 and 2 only done clear
B) 2 and 3 done clear
C) 2, 3 and 4 only done clear
D) 1, 2 and 3 only done clear
View Solution play_arrowquestion_answer11) Match the following:
List-I | List-II | ||
A. | Wave drage of a ship | 1. | Cavitation in pumps and turbines |
B. | Pressure coefficient | 2. | \[\rho \,r.r\,{{L}^{3}}r\] |
C. | Thoma numbers | 3. | Re = 0.1 |
D. | Stokes Law | 4. | \[\frac{\Delta \,p}{\rho \,{{\text{V}}^{\text{2}}}\text{/}\,\text{2}}\] |
A) A\[\to \]1, B\[\to \]2, C\[\to \]4, D\[\to \]3 done clear
B) A\[\to \]4, B\[\to \]3, C\[\to \]1, D\[\to \]2 done clear
C) A\[\to \]1, B\[\to \]3, C\[\to \]4, D\[\to \]3 done clear
D) A\[\to \]2, B\[\to \]4, C\[\to \]1, D\[\to \]2 done clear
View Solution play_arrowquestion_answer12) The terminal velocity of small sphere falling in a viscous fluid is:
A) Proportional to the diameter of the sphere done clear
B) Inversely proportional to the viscosity of the fluid done clear
C) Inversely proportional to the diameter of the sphere done clear
D) Proportional to the density of the fluid. done clear
View Solution play_arrowquestion_answer13) Which of the following statement is true?
A) For an ideal fluid \[\mu =0.\] \[\rho =0\] constant, K =0 done clear
B) A floating body is in stable, unstable or neutral equilibrium according to as the metacentric height is zero, positive or negative. done clear
C) The exact analysis of viscous flow problems can be made by Euler's equation done clear
D) The most economical diameter of a pipe is the one for which the annual fixed cost and annual power cost (to overcome friction) are minimum. done clear
View Solution play_arrowquestion_answer14) Which of the following statements is false?
A) The lift force (per unit length) on a body depends on the density of the fluid done clear
B) For laminar flow through a pipe, the loss of head is directly proportional to velocity as well as viscosity of fluid done clear
C) A hydraulic jump occurs when a supercritical flow comes across sub critical flow done clear
D) At the stall point for the airfoil, the lift is minimum and the drag decreases sharply beyond it. done clear
View Solution play_arrowquestion_answer15) Which of the following is not a dimensionless group?
A) \[\frac{\Delta \,p}{\rho \,{{N}^{2}}{{D}^{2}}}\] done clear
B) \[\frac{g\,H}{{{N}^{2}}\,{{D}^{2}}}\] done clear
C) \[\frac{\rho \,\omega \,{{D}^{2}}}{\mu }\] done clear
D) \[\frac{\Delta \,p}{\rho \,{{V}^{3}}}\] done clear
View Solution play_arrowquestion_answer16) For a real fluid moving with uniform velocity, the pressure:
A) Depends upon depth and orientation done clear
B) is independent of depth but depends upon orientation done clear
C) is independent of orientation but depends upon depth done clear
D) is independent of both depth and orientation done clear
View Solution play_arrowquestion_answer17) Consider the following assumptions:
1. Steady flow |
2. In viscid flow |
3. Flow along a stream line |
4. Conservative force field |
A) 1 and 2 done clear
B) 1, 2 and 4 done clear
C) 2, 3 and 4 done clear
D) 1, 3 and 4 done clear
View Solution play_arrowA) Mass of the liquid above the curved surface done clear
B) Weight of the liquid above curved surface done clear
C) Product of pressure at C.G. multiplied by the area of the curved surface done clear
D) Product of pressure at C.G. multiplied by the projected area of the curved surface done clear
View Solution play_arrowA) Fluid must be compressible done clear
B) Fluid must be ideal done clear
C) Pipe must be smooth done clear
D) Flow must be laminar done clear
View Solution play_arrowA) \[V=i\sqrt{mC}\] done clear
B) \[V=C\sqrt{i\,m}\] done clear
C) \[V=m\sqrt{i\,C}\] done clear
D) \[V=\sqrt{m\,i\,C}\] done clear
View Solution play_arrowquestion_answer21) The standard sea level atmospheric pressure is equivalent to:
A) 10.2 m of freshwater of \[\rho =998\,\,\text{kg/}{{\text{m}}^{\text{3}}}\] done clear
B) 10.2 m of salt water \[\rho =1025\,\,\text{kg/}{{\text{m}}^{\text{3}}}\] done clear
C) 25.5 m of kerosene of \[\rho =800\,\,\text{kg/}{{\text{m}}^{\text{3}}}\] done clear
D) 6.4 m of carbon tetrachloride of \[\rho =1590\,\,\text{kg/}{{\text{m}}^{\text{3}}}\] done clear
View Solution play_arrowA) \[\frac{dp}{dz}=-\frac{\rho }{g}\] done clear
B) \[\frac{dp}{g}\,=\,-\,\frac{dz}{\rho }\] done clear
C) \[\rho \,dp=-\frac{dz}{g}\] done clear
D) \[\frac{dp}{\rho }=-g\,dz\] done clear
View Solution play_arrowA) 2 done clear
B) \[\sqrt{2}\] done clear
C) 1 done clear
D) \[\frac{1}{2}\] done clear
View Solution play_arrowList-I | List-II | ||
A. | Absolute viscosity | 1. | \[\frac{du}{dy}\] is constant |
B. | Kinematic viscosity | 2. | Newton per metre |
C. | Newtonian fluid | 3. | Poise |
D. | Surface tension | 4. | \[\frac{Stress}{Strain}\] constant |
5. | Strokes |
A) A\[\to \]5, B\[\to \]3, C\[\to \]2, D\[\to \]1 done clear
B) A\[\to \]3, B\[\to \]5, C\[\to \]2, D\[\to \]4 done clear
C) A\[\to \]5, B\[\to \]3, C\[\to \]4, D\[\to \]2 done clear
D) A\[\to \]3, B\[\to \]5, C\[\to \]1, D\[\to \]2 done clear
View Solution play_arrowA) \[\nabla \times \overrightarrow{\nabla }=0\] done clear
B) \[\nabla \times \overrightarrow{V}=1\] done clear
C) \[{{\nabla }^{2}}\times \overrightarrow{\nabla }=1\] done clear
D) \[(\overrightarrow{\nabla }.\nabla )\,\overrightarrow{\nabla }=\frac{\partial \,\overrightarrow{\nabla }}{\partial \,t}\] done clear
View Solution play_arrowA) \[\nabla .\rho \,\overline{V}+\frac{\partial \rho }{\partial \,t}=0\] done clear
B) \[\nabla .\rho \,\overline{V}+\frac{\partial \rho }{\partial \,t}=0\] done clear
C) \[\nabla .\overline{V}=0\] done clear
D) \[\nabla .\rho \,\overline{V}=0\] done clear
View Solution play_arrowA) 0.82 m done clear
B) 4.43 m done clear
C) 1 m done clear
D) 19.6 m done clear
View Solution play_arrowList-I | List-II | ||
A. | Orifice meter | 1. | Measurement of flow in channel |
B. | Broad creasted weir | 2. | Measurement of velocity in a pipe/ channel |
C. | Pitol tube | 3. | Measurement of flow in a pipe of may inclination |
D. | Rotameter | 4. | Measurement of upward flow in a vertical pipe |
A) A\[\to \]3, B\[\to \]1, C\[\to \]4, D\[\to \]2 done clear
B) A\[\to \]1, B\[\to \]3, C\[\to \]2, D\[\to \]4 done clear
C) A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 done clear
D) A\[\to \]1, B\[\to \]3, C\[\to \]4, D\[\to \]2 done clear
View Solution play_arrowquestion_answer29) Decrease in temperature, in general, results in:
A) An increase in viscosities of both gases and liquids done clear
B) A decrease in the viscosity of liquids and gases done clear
C) An increase in the viscosity of liquids and an decrease in that of gases done clear
D) A decrease in the viscosity of liquids and an increase in that of gases done clear
View Solution play_arrowquestion_answer30) Consider the following statements:
(1) Streak line indicates instantaneous position of particles of fluid passing through a point. |
(2) Streamlines are paths traced by a fluid particle with constant velocity. |
(3) Fluid particles cornot cross streamlines irrespective of the type of flow. |
(4) Streamlines converge as the fluid is accelerated, and diverge when retarded. |
A) 1 and 4 done clear
B) 1, 3 and 4 done clear
C) 1, 2, and 4 done clear
D) 2 and 3 done clear
View Solution play_arrowquestion_answer31) If the diameter of a capillary tube is doubled, the capillary-rise will become:
A) \[\sqrt{2}\] Times less done clear
B) Double done clear
C) Half done clear
D) \[\sqrt{2}\]Times more done clear
View Solution play_arrowList-I | List-II | ||
A. | 500 | 1. | 4 |
B. | 100 | 2. | 5 |
C. | 400 | 3. | 10 |
D. | 200 | 4. | 15 |
5. | 20 |
A) A\[\to \]5, B\[\to \]1, C\[\to \]2, D\[\to \]3 done clear
B) A\[\to \]1, B\[\to \]4, C\[\to \]2, D\[\to \]3 done clear
C) A\[\to \]1, B\[\to \]4, C\[\to \]3, D\[\to \]4 done clear
D) A\[\to \]3, B\[\to \]2, C\[\to \]5, D\[\to \]1 done clear
View Solution play_arrowA) \[\frac{1}{3}\] done clear
B) \[\frac{1}{2}\] done clear
C) 1 done clear
D) 2 done clear
View Solution play_arrowA) \[L\,\mu \,V\] done clear
B) \[\frac{{{\mu }^{2}}{{V}^{2}}}{{{L}^{2}}}\] done clear
C) \[{{\mu }^{2}}{{V}^{2}}{{L}^{2}}\] done clear
D) \[\frac{\mu \,L}{V}\] done clear
View Solution play_arrowA) 8 done clear
B) 6 done clear
C) 4 done clear
D) 2 done clear
View Solution play_arrowList-I (Nature of equilibrium of floating body) | List-II (Conditions for equilibrium) | ||
A. | Unstable equilibrium | 1. | \[\overline{MG}\,\,=\,\,0\] |
B. | Netutral equilibrium | 2. | M is above G M is below G |
C. | Stable equilibrium | 4. | \[\overline{BG}\,\,=\,\,0\] |
A) A\[\to \]1, B\[\to \]3, C\[\to \]2 done clear
B) A\[\to \]3, B\[\to \]1, C\[\to \]2 done clear
C) A\[\to \]1, B\[\to \]3, C\[\to \]4 done clear
D) A\[\to \]4, B\[\to \]2, C\[\to \]3 done clear
View Solution play_arrowA) 2 done clear
B) 4 done clear
C) \[2\,\sqrt{2}\] done clear
D) \[4\,\sqrt{2}\] done clear
View Solution play_arrowA) \[\tau =0\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}};\] \[\tau =\mu \,{{\left( \frac{du}{dv} \right)}^{3}}\] done clear
B) \[\tau =0\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}}\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}}\] done clear
C) \[\tau =\mu \,\left( \frac{du}{dy} \right)\,\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}};\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{3}}\] done clear
D) \[\tau =\mu \,\left( \frac{du}{dy} \right)\,;\] \[\tau =\mu \,{{\left( \frac{du}{dy} \right)}^{2}};\] \[\tau =0\] done clear
View Solution play_arrowquestion_answer39) Consider the following statements:
1. For stream function to exist, the flow should be irrotational. |
2. Potential functions are possible even though continuity is not satisfied. |
3. Stremlines diverge where the flow is accelerated. |
4. Bernoulli's equation will be satisfied for flow across a cross-section. |
A) 1, 2, 3 and 4 done clear
B) 1, 3 and 4 done clear
C) 3 and 4 done clear
D) 2 only done clear
View Solution play_arrowList-I (Device) | List-II (Use) | ||
A. | Picot tube | 1. | Boundary shear stress |
B. | Preston tube | 2. | Turbuleny velocity fluctuations |
C. | Flow Nozzle | 3. | The total head |
D. | Hot wire anemometer | 4. | Flow rate |
A) A\[\to \]4, B\[\to \]2, C\[\to \]3, D\[\to \]1 done clear
B) A\[\to \]3, B\[\to \]1, C\[\to \]4, D\[\to \]2 done clear
C) A\[\to \]4, B\[\to \]1, C\[\to \]3, D\[\to \]2 done clear
D) A\[\to \]3, B\[\to \]2, C\[\to \]4, D\[\to \]1 done clear
View Solution play_arrowquestion_answer41) Flow separation is caused by:
A) Thinning of boundary layer thickness to zero done clear
B) A negative pressure gradient done clear
C) A positive pressure gradient done clear
D) Reduction of pressure to local vapour pressure done clear
View Solution play_arrowList-I (Term) | List-II (Expression) | ||
A. | Discharge, Q | 1. | \[\frac{16\mu }{\rho \,VD}\] |
B. | Pressure drop, \[\frac{\Delta P}{L}\] | 2. | \[\frac{\pi \,{{d}^{3}}\Delta p}{128\,\mu L}\] |
C. | Friction factor, \[f\] | 3. | \[\frac{32\,\mu \,V}{{{D}^{2}}}\] |
4. | \[\frac{\pi {{d}^{4}}\Delta p}{128\,\mu L}\] |
A) A\[\to \]2, B\[\to \]3, C\[\to \]4 done clear
B) A\[\to \]4, B\[\to \]3, C\[\to \]1 done clear
C) A\[\to \]4, B\[\to \]1, C\[\to \]3 done clear
D) A\[\to \]1, B\[\to \]4, C\[\to \]2 done clear
View Solution play_arrowquestion_answer43) The magnus effect is defined as:
A) The generation of lift per unit drage force done clear
B) The circulation induced in an aircraft wing done clear
C) The separation of boundary layer near the trailing edge of a slender body done clear
D) The generation of lift on a rotating cylinder in a uniform flow. done clear
View Solution play_arrowA) 0.04 m/s done clear
B) 0.2 m/s done clear
C) 5.0 m/s done clear
D) 25.0 m/s done clear
View Solution play_arrowquestion_answer45) Consider the following statements for a two- dimensional potential flow:
1. Laplace equation for stream function must be satisfied. |
2. Laplace equation for velocity potential must be satisfied. |
3. Stremlines and equipotential lines are mutually perpendicular. |
4. Streamlines can intersect each other in very high speed flows. |
A) 1 and 4 done clear
B) 2 and 4 done clear
C) 1, 2 and 3 done clear
D) 2, 3 and 4 done clear
View Solution play_arrowquestion_answer46) Which of the following equations are forms of continuity equations?
(\[\overrightarrow{V}\]is the velocity and \[\forall \] is volume) |
1. \[{{A}_{1}}{{\overrightarrow{V}}_{1}}={{A}_{2}}\overrightarrow{{{V}_{2}}}\] |
2. \[1\frac{du}{\partial x}+\frac{dv}{\partial y}=0\] |
3. \[\int\limits_{S}{\rho \overrightarrow{V}\,.\,dA+\int\limits_{\forall }{\rho \,d\forall =0}}\] |
4. \[\frac{1}{r}\,\,\frac{\partial \,\left( r{{v}_{r}} \right)}{\partial r}+\frac{\partial {{v}_{z}}}{\partial z}=0\] |
Select the correct answer using the codes below: |
A) 1, 2, 3 and 4 done clear
B) 1 and 2 done clear
C) 3 and 4 done clear
D) 2, 3 and 4 done clear
View Solution play_arrowA) 1 : 2 done clear
B) 1 : 3 done clear
C) 2 : 3 done clear
D) 3 : 4 done clear
View Solution play_arrowquestion_answer48) The Bernoulli's equation refers to conservation of:
A) Mass done clear
B) linear momentum done clear
C) Angular momentum done clear
D) energy done clear
View Solution play_arrowquestion_answer49) The continuity equation in a differential form is:
A) \[\frac{dA}{A}+\frac{dV}{V}+\frac{dp}{\rho }=\text{constant}\] done clear
B) \[\frac{A}{dA}+\frac{V}{dV}+\frac{\rho }{dp}=\text{constant}\] done clear
C) \[\frac{dA}{A}+\frac{dV}{V}+\frac{dp}{\rho }=0\] done clear
D) \[AdA+VdV+p\,d\rho =0\] done clear
View Solution play_arrowquestion_answer50) Velocity defect in boundary layer theory is defined as:
A) The error in the measurement of velocity at any point in the boundary layer done clear
B) The difference between the velocity at a point within the boundary layer and the free stream velocity done clear
C) The difference between the velocity at any point within the boundary layer and the velocity nearer the boundary done clear
D) The ratio between the velocity at a point in the boundary layer and the free stream velocity. done clear
View Solution play_arrowquestion_answer51) The drage coefficient for laminar flow varies with Reynolds number (Re) as:
A) \[{{\operatorname{Re}}^{1/2}}\] done clear
B) Re done clear
C) \[{{\operatorname{Re}}^{-1}}\] done clear
D) \[{{\operatorname{Re}}^{-1/2}}\] done clear
View Solution play_arrowList-I (Basic Ideal Flow) | List-II (Example) | ||
A. | Superposition of a uniform flow over a doublet | 1. | Flow over a half Rankine body |
B. | Superposition of a uniform flow over a source and sink | 2. | Flow over a Rankine oval |
C. | Superposition of a uniform flow over a source | 3. | Flow over a rotating body |
D. | Superposition of a free vortex flow along with a uniform flow over a doublet | 4. | Flow over a stationary body |
A) A\[\to \]4, B\[\to \]1, C\[\to \]2, D\[\to \]3 done clear
B) A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4 done clear
C) A\[\to \]4, B\[\to \]2, C\[\to \]1, D\[\to \]3 done clear
D) A\[\to \]3, B\[\to \]1, C\[\to \]2, D\[\to \]4 done clear
View Solution play_arrowquestion_answer53) The square root of the ratio of inertia force to gravity force is called:
A) Reynolds number done clear
B) Froude number done clear
C) Mach number done clear
D) Euler number done clear
View Solution play_arrowA) \[{{x}^{4/5}}\] done clear
B) \[{{x}^{1/2}}\] done clear
C) \[{{x}^{1/5}}\] done clear
D) \[{{x}^{3/5}}\] done clear
View Solution play_arrowA) \[{{\omega }_{z}}=\frac{1}{2}\,\,\left( \frac{\partial u}{\partial x}-\frac{\partial v}{\partial y} \right)\] done clear
B) \[{{\omega }_{z}}=\frac{1}{2}\,\,\left( \frac{\partial u}{\partial x}+\frac{\partial v}{\partial y} \right)\] done clear
C) \[{{\omega }_{z}}=\frac{1}{2}\,\,\left( \frac{\partial v}{\partial x}-\frac{\partial u}{\partial y} \right)\] done clear
D) \[{{\omega }_{z}}=\frac{1}{2}\,\,\left( \frac{\partial v}{\partial x}-\frac{\partial u}{\partial y} \right)\] done clear
View Solution play_arrowA) \[\frac{\partial v}{\partial y}-\frac{\partial u}{\partial x}=0\] done clear
B) \[\frac{\partial u}{\partial z}-\frac{\partial v}{\partial x}=0\] done clear
C) \[\frac{\partial w}{\partial y}-\frac{\partial v}{\partial z}=0\] done clear
D) \[\frac{\partial v}{\partial x}-\frac{\partial u}{\partial y}=0\] done clear
View Solution play_arrowA) \[f=\frac{\rho {{v}^{2}}}{2{{\tau }_{0}}}\] done clear
B) \[f=\frac{{{\tau }_{0}}}{\rho {{v}^{2}}}\] done clear
C) \[f=\frac{2{{\tau }_{0}}}{\rho {{v}^{2}}}\] done clear
D) \[\frac{2\rho {{v}_{0}}}{{{\tau }_{0}}}\] done clear
View Solution play_arrowquestion_answer58) Velocity distribution in a turbulent boundary layer follows:
A) Logarithmic law done clear
B) Parabolic law done clear
C) Linear law done clear
D) Cubic law done clear
View Solution play_arrowA) \[\frac{3\pi }{59}\,{{\text{m}}^{\text{3}}}\text{/s}\] done clear
B) \[\frac{3\pi }{2,500}\,{{\text{m}}^{\text{3}}}\text{/s}\] done clear
C) \[\frac{3\pi }{5000}\,{{\text{m}}^{\text{3}}}\text{/s}\] done clear
D) \[\frac{3\pi }{10000}\,{{\text{m}}^{\text{3}}}\text{/s}\] done clear
View Solution play_arrowA) \[\theta ={{\int\limits_{0}^{\delta }{\left[ 1-\frac{U}{{{U}_{0}}} \right]}}^{2}}\,dy\] done clear
B) \[\theta ={{\int\limits_{0}^{\delta }{\left[ 1-\frac{U}{{{U}_{0}}} \right]}}^{2}}\,dy\] done clear
C) \[\theta =\int\limits_{0}^{\delta }{\,\frac{U}{{{U}_{0}}}\left[ 1-\frac{U}{{{U}_{0}}} \right]}\,\,dy\] done clear
D) \[\theta =\int\limits_{0}^{\delta }{\,\frac{U}{{{U}_{0}}}\left[ 1-\,{{\left( \frac{U}{{{U}_{0}}} \right)}^{2}} \right]}\,\,dy\] done clear
View Solution play_arrowA) \[6\times {{10}^{-3}}\] done clear
B) \[6\times {{10}^{-5}}\] done clear
C) \[3\times {{10}^{-3}}\] done clear
D) \[2\times {{10}^{-3}}\] done clear
View Solution play_arrowA) \[\frac{{{\tau }_{1}}}{{{\tau }_{2}}}=3.0\] done clear
B) \[\frac{{{\tau }_{1}}}{{{\tau }_{2}}}=\frac{1}{3}\] done clear
C) \[\frac{{{\tau }_{1}}}{{{\tau }_{2}}}=\,\,{{\left( 3.0 \right)}^{1/2}}\] done clear
D) \[\frac{{{\tau }_{1}}}{{{\tau }_{2}}}=\,\,\left( 3.0 \right)\] done clear
View Solution play_arrow1. Velocity jump |
2. Pressure jump |
3. Velocity drop |
4. Pressure drop |
A) 1 only done clear
B) 1 and 2 done clear
C) 2 and 3 done clear
D) 1 and 4 done clear
View Solution play_arrowA) 24 kN done clear
B) 28 kN done clear
C) 12 kN done clear
D) 16 kN done clear
View Solution play_arrowA) Is a uniform flow with local acceleration done clear
B) Has convective normal acceleration done clear
C) Has convective tangential acceleration done clear
D) Has both convective normal and tangential accelerations. done clear
View Solution play_arrowA) \[{{\omega }_{z}}=\frac{1}{2}\,\left( \frac{\partial v}{\partial x}-\frac{\partial u}{\partial y} \right)\] done clear
B) \[{{\omega }_{z}}=\frac{1}{2}\,\left( \frac{\partial v}{\partial x}-\frac{\partial u}{\partial y} \right)\] done clear
C) \[{{\omega }_{z}}=\frac{1}{2}\,\left( \frac{\partial v}{\partial x}-\frac{\partial v}{\partial y} \right)\] done clear
D) \[{{\omega }_{z}}=\frac{1}{2}\,\left( \frac{\partial u}{\partial x}+\frac{\partial v}{\partial y} \right)\] done clear
View Solution play_arrowA) 4 done clear
B) 3 done clear
C) 2 done clear
D) 1 done clear
View Solution play_arrowquestion_answer68) Which one of the following is the characteristics a fully developed laminar:
A) The pressure drop in the flow direction is zero done clear
B) The velocity profile changes uniformly in the flow direction done clear
C) The velocity profile does not change in the flow direction done clear
D) The Reynolds number for the flow is critical. done clear
View Solution play_arrowA) \[\delta <\delta *>\theta \] done clear
B) \[\delta *>\theta >\delta \] done clear
C) \[\theta >\delta >\delta *\] done clear
D) \[\theta >\delta *>\delta \] done clear
View Solution play_arrowA) \[{{x}^{4/5}}\] done clear
B) \[{{x}^{3/5}}\] done clear
C) \[{{x}^{1/2}}\] done clear
D) \[{{x}^{1/5}}\] done clear
View Solution play_arrowA) 0.3 N done clear
B) 3 N done clear
C) 10 N done clear
D) 16 N done clear
View Solution play_arrowA) \[\frac{dA}{A}+\frac{dV}{V}+\frac{d\rho }{\rho }=\text{constant}\] done clear
B) \[\frac{dA}{A}+\frac{dV}{V}+\frac{d\rho }{\rho }=0\] done clear
C) \[\frac{A}{dA}+\frac{V}{dV}+\frac{\rho }{d\rho }=\text{constant}\] done clear
D) \[AdA+VdA+\rho d\rho =0\] done clear
View Solution play_arrowA) 33.33% done clear
B) 50.00% done clear
C) 66.66% done clear
D) 75.00% done clear
View Solution play_arrowA) \[\frac{\partial v}{\partial x}=\frac{\partial u}{\partial y}\] done clear
B) \[\frac{\partial v}{\partial x}=\frac{\partial u}{\partial y}\] done clear
C) \[\frac{\partial u}{\partial x}=\frac{\partial v}{\partial y}\] done clear
D) \[\frac{\partial u}{\partial x}=\frac{\partial v}{\partial y}\] done clear
View Solution play_arrowA) \[\delta /2\] done clear
B) \[\delta /3\] done clear
C) \[\delta /4\] done clear
D) \[\delta /6\] done clear
View Solution play_arrowA) \[\frac{{{\tau }_{0}}}{\frac{1}{2}\,\rho \,U_{\infty }^{2}}=\frac{\partial \theta }{\partial x}\] done clear
B) \[\frac{{{\tau }_{0}}}{2\,\rho \,U_{\infty }^{2}}=\frac{\partial \theta }{\partial x}\] done clear
C) \[\frac{{{\tau }_{0}}}{\rho \,U_{\infty }^{2}}=\frac{\partial \theta }{\partial x}\] done clear
D) \[\frac{{{\tau }_{0}}}{\frac{1}{3}\,\rho \,U_{\infty }^{2}}=\frac{\partial \theta }{\partial x}\] done clear
View Solution play_arrowA) 30 cm done clear
B) 75 cm done clear
C) 150 cm done clear
D) 300 cm done clear
View Solution play_arrowA) \[\rho l\,\overline{\frac{du}{dy}}\] done clear
B) \[\rho {{l}^{2}}\,\overline{\frac{du}{dy}}\] done clear
C) \[\rho l\,{{\left( \overline{\frac{du}{dy}} \right)}^{2}}\] done clear
D) \[\rho {{l}^{2}}\,{{\left( \overline{\frac{du}{dy}} \right)}^{2}}\] done clear
View Solution play_arrowquestion_answer79) Consider the following statements:
The state of stress in a fluid consists of normal pressure only if the fluid: |
1. is at rest |
2. Is in uniform motion |
3. Has non-uniform velocity profile |
4. Has zero viscosity. |
A) 1, 2 and 3 done clear
B) 1, 2 and 4 done clear
C) 1, 3 and 4 done clear
D) 2, 3 and 4 done clear
View Solution play_arrowA) \[f=\text{8/Re}\] done clear
B) \[f=16\text{/Re}\] done clear
C) \[f=32\text{/Re}\] done clear
D) \[f=64\text{/Re}\] done clear
View Solution play_arrowA) \[\delta \] done clear
B) \[\delta /2\] done clear
C) \[\delta /3\] done clear
D) \[\delta /4\] done clear
View Solution play_arrowA) \[u={{u}_{\max }}\,[1-{{(r/R)}^{2}}]\] done clear
B) \[u={{u}_{\max }}\,[{{R}^{2}}-{{r}^{2}}]\] done clear
C) \[u={{u}_{\max }}\,{{[1-(r/R)]}^{2}}\] done clear
D) \[u={{u}_{\max }}\,{{[1+(r/R)]}^{2}}\] done clear
View Solution play_arrowA) \[6x+xy\] done clear
B) \[6+xy\] done clear
C) \[-\,\left( 6x+xy \right)\] done clear
D) \[-\,\left( 6y+\frac{1}{2}\,{{y}^{2}} \right)\] done clear
View Solution play_arrowA) \[xy=3\] done clear
B) \[x+y=4\] done clear
C) \[x+3y=6\] done clear
D) \[{{x}^{2}}y=9\] done clear
View Solution play_arrowquestion_answer85) Consider the following statements:
1. Boundary-layer thickness in laminar flow is greater than that of turbulent flow. |
2. Boundary-layer thickness of turbulent flow is greater than that of laminar flow. |
3. Velocity distributes uniformly in a turbulent boundary-layer. |
4. Velocity has a gradual variation in a laminar boundary layer. |
A) 1, 3 and 4 only done clear
B) 1, 2, 3 and 4 done clear
C) 1 and 2 only done clear
D) 2, 3 and 4, only done clear
View Solution play_arrowquestion_answer86) Motion economy is better achieved by
A) Method study done clear
B) Time study done clear
C) Work space design done clear
D) Process planning. done clear
View Solution play_arrowA) Parabolic and parabolic done clear
B) Parabolic and elliptic done clear
C) Linear and 1/7 power law done clear
D) Parabolic and 1/7 power law done clear
View Solution play_arrowA) Constant across the passage done clear
B) Maximum at the Centre and zero at the boundary done clear
C) Zero all through the passage done clear
D) Maximum at the boundary and zero at the centre done clear
View Solution play_arrowquestion_answer89) Consider the following statements:
The coefficient of discharge \[{{C}_{d}}\] of a venturimeter takes into account. |
1. The effect of roughness of the surface |
2. Non-uniform velocity distributions at inlet and throat section. |
3. Reynolds number of flow |
4. Discharge |
5. Length of throat |
6. Diameter of throat |
7. Diameter ratio |
A) 1, 2, 4 and 5 done clear
B) 1, 4, 5 and 6 done clear
C) 1, 2, 3 and 7 done clear
D) 2, 6 and 7 done clear
View Solution play_arrowA) \[\frac{dQ}{Q}=\frac{5dH}{2H}\] done clear
B) \[\frac{dQ}{Q}=\frac{3dH}{2H}\] done clear
C) \[\frac{dQ}{Q}=\frac{7dH}{2H}\] done clear
D) \[\frac{dQ}{Q}=\frac{1dH}{2H}\] done clear
View Solution play_arrowA) Static pressure done clear
B) Total pressure done clear
C) Dynamic pressure done clear
D) Difference between total pressure and dynamic pressure. done clear
View Solution play_arrowA) \[\tau =\frac{\partial p{{r}^{2}}}{\partial x}\] done clear
B) \[\tau =\frac{\partial p\left( r/2 \right)}{\partial x}\] done clear
C) \[\tau =-\,\,\frac{\partial p\left( r/2 \right)}{\partial x}\] done clear
D) \[\tau =\frac{\partial p\left( r \right)}{\partial x}\] done clear
View Solution play_arrowA) \[\frac{D}{d}=2\] done clear
B) \[\frac{D}{d}=\sqrt{2}\] done clear
C) \[\frac{D}{d}={{4}^{1/5}}\] done clear
D) \[\frac{D}{d}={{4}^{1/3}}\] done clear
View Solution play_arrowList-I (from of Bernouli?s Equation) | List-II (Units of these forms) | ||
A. | \[p+wz+\frac{\rho {{V}^{2}}}{2}\] | 1. | Total energy per unit volume |
B. | \[\frac{p}{\acute{A}}+gz+\frac{{{V}^{2}}}{2}\] | 2. | Total energy per unit mass |
C. | \[\frac{p}{w}+z+\frac{{{V}^{2}}}{2g}\] | 3. | Total energy per unit weight |
A) A\[\to \]1, B\[\to \]2, C\[\to \]3 done clear
B) A\[\to \]1, B\[\to \]3, C\[\to \]2 done clear
C) A\[\to \]2, B\[\to \]1, C\[\to \]3 done clear
D) A\[\to \]2, B\[\to \]3, C\[\to \]1 done clear
View Solution play_arrowA) Energy must decrease done clear
B) Velocity must decrease done clear
C) Pressure must decrease done clear
D) Momentum must decrease done clear
View Solution play_arrowquestion_answer96) Which one of the following statements is correct stability of a floating body:
A) M should lie between G and B (in that order) done clear
B) M should lie above B and G (in that order) done clear
C) M should lie below B and G (in that order) done clear
D) M should coincide with B and G done clear
View Solution play_arrowquestion_answer97) Consider the following statements:
A rectangular block of wood of size \[L\times B\times H\]float in water in such a way that: |
(1) The longest dimension is vertical |
(2) The longest dimension is horizontal |
(3) The metacentre is above Centre of gravity |
(4) The Centre of buoyancy is above the Centre of gravity |
A) 1 only done clear
B) 2 only 3, only done clear
C) 2, 3 and 4 done clear
D) 1, 3 and 4 done clear
View Solution play_arrowquestion_answer98) Bernoulli's equation is derived by making which one of the following assumptions?
A) The flow is steady only done clear
B) The flow is uniform and incompressible done clear
C) The flow is non-viscous, uniform and steady done clear
D) The flow is steady, non-viscous, incompressible and irrotational. done clear
View Solution play_arrowA) \[{{10}^{-5m}}\] done clear
B) \[{{10}^{-6}}\] done clear
C) \[{{10}^{-2}}\] done clear
D) Not possible to estimate since there cannot be a possibility, of formation of a thin film of water at interface done clear
View Solution play_arrowA) Zero done clear
B) Adverse done clear
C) Slightly favourable done clear
D) Strongly favourable done clear
View Solution play_arrowA) Mass of liquid vertically above it done clear
B) Weight of the liquid vertically above it done clear
C) Force on a vertical projection of the surface done clear
D) Product of pressure at the centroid and the surface area done clear
View Solution play_arrowA) 981 N done clear
B) 98.1 N done clear
C) 9.81 N done clear
D) 0.98 N done clear
View Solution play_arrowA) Constant angular velocity done clear
B) Constant angular acceleration done clear
C) Linearly varying velocity done clear
D) Linearly varying acceleration done clear
View Solution play_arrowA) \[udx-vdy=0\] done clear
B) \[vdx-udy=0\] done clear
C) \[uv\,dx-dy=0\] done clear
D) \[udx+vdy=0\] done clear
View Solution play_arrowA) Ideal fluid flow done clear
B) Incompressible fluid whether the flow is steady or not done clear
C) Steady flow, whether is compressible or not done clear
D) Steady flow and compressible fluids done clear
View Solution play_arrowA) \[\sqrt{2}\] done clear
B) \[2\sqrt{2}\] done clear
C) 4 done clear
D) \[4\sqrt{2}\] done clear
View Solution play_arrowA) 2V done clear
B) V done clear
C) V/2 done clear
D) V/4 done clear
View Solution play_arrowA) 2.43 done clear
B) 3.45 done clear
C) 4.43 done clear
D) 5.00 done clear
View Solution play_arrowA) 1.0 done clear
B) 0.6 done clear
C) 0.3 done clear
D) 0.1 done clear
View Solution play_arrowA) 2000 m done clear
B) 3000 m done clear
C) 4000 m done clear
D) 5000 m done clear
View Solution play_arrowquestion_answer111) At the interface of a liquid and a gas at rest, the pressure is:
A) Higher on the concave side compared to that on the convex side done clear
B) Higher on the convex side compared to that on the concave side done clear
C) Equal on both sides done clear
D) Equal to surface tension divided by radius of curvature on both sides done clear
View Solution play_arrowA) 29400 N done clear
B) 38240 N done clear
C) 78400 N done clear
D) 49050 N done clear
View Solution play_arrowList-I (Device) | List-II (Use) | ||
A. | Barometer | 1. | Gauge pressure |
B. | Hydrometer | 2. | Local atmospheric pressure |
C. | U-tube manometer | 3. | Relative density |
D. | Bourden gauge | 4. | Pressure differential |
A) A\[\to \]2, B\[\to \]3, C\[\to \]1, D\[\to \]4 done clear
B) A\[\to \]3, B\[\to \]2, C\[\to \]1, D\[\to \]4 done clear
C) A\[\to \]3, B\[\to \]2, C\[\to \]4, D\[\to \]1 done clear
D) A\[\to \]2, B\[\to \]3, C\[\to \]4, D\[\to \]1 done clear
View Solution play_arrowA) Steady flow done clear
B) Uniform flow done clear
C) Ideal fluid flow done clear
D) Ideal as well as viscous fluid flow done clear
View Solution play_arrowA) Steady, frictionless and incompressible flow along a streamline done clear
B) Uniform and frictionless flow along a streamline when \[\rho \] is a function p done clear
C) Steady and frictionless flow along a streamline when \[\rho \] is a function of p done clear
D) Steady, uniform and incomperssible flow along a streamline. done clear
View Solution play_arrowA) \[\frac{L}{2}\] done clear
B) \[\frac{L}{\sqrt{2}}\] done clear
C) \[\sqrt{2}L\] done clear
D) \[\frac{L}{4}\] done clear
View Solution play_arrowA) 3 done clear
B) 4 done clear
C) 5 done clear
D) 6 done clear
View Solution play_arrowA) \[X\] done clear
B) \[{{X}^{1/2}}\] done clear
C) \[{{X}^{1/5}}\] done clear
D) \[{{X}^{4/5}}\] done clear
View Solution play_arrowquestion_answer119) Consider the following coefficients:
(Re = Reynold number) |
1. \[1.328\,\,{{\operatorname{Re}}^{-\,\left( 0.5 \right)}}\] for laminar flow |
2. \[0.72\,\,{{\operatorname{Re}}^{-\,\left( 0.2 \right)}}\] for turbulent flow |
3. \[0.072\,\,{{\operatorname{Re}}^{-\,\left( 0.2 \right)}}\] for turbulent flow |
4. \[1.028\,\,{{\operatorname{Re}}^{-\,\left( 0.5 \right)}}\] for laminar flow. |
A) 1 and 2 done clear
B) 2 and 4 done clear
C) 1 and 3 done clear
D) 3 and 4 done clear
View Solution play_arrowquestion_answer120) Consider the following statements:
1. Gases are considered incompressible when Mach number is less than 0.2 |
2. A Newtonian fluid is incompressible and non- viscous |
3. An ideal fluid has negligible surface tension which of these statements (s) is/are correct? |
A) 2 and 3 done clear
B) 2 alone done clear
C) 1 alone done clear
D) 1 and 3 done clear
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