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Q1. | Stream lines and path lines always coincide in case of. |

A. | steady flow [Correct Answer] |

B. | steady flow [Wrong Answer] |

C. | uniform flow [Wrong Answer] |

D. | turbulent flow [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ For laminar flow in circular pipes, the Darcy's friction factor f is equal to.

16/Re

32/ Re

64/ Re

none of the above where R,, is Reynolds number.

⇒ A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of

3.75 m

4.0 m

4.2m

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⇒ Action of a point-gun is based on

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Faraday's law

Archimedes' principle

⇒ In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is

22.5 m/sec.

33 m/sec.

40 m/sec.

90 m/sec.

⇒ Separation of flow occurs when

the pressure intensity reaches a minimum

the cross-section of a channel is reduced

the boundary layer comes to rest

all of the above

⇒ For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is.

constant

dependent only on Reynolds number

a function of Reynolds number and relative roughness

dependent on relative roughness only

⇒ Manometer is used to measure

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⇒ In a Sutro weir, the discharge is proportional to.

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⇒ The total energy line lies over the hydraulic gradient line by an amount equal to

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⇒ In steady flow of a fluid, the total accele ration of any fluid particle

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is independent of coordinates

⇒ Select the correct statement.

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The friction factor decreases with time.

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⇒ Coefficient of contraction for an external cylindrical mouthpiece is.

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0.7H

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⇒ Hot wire anemometer is used to measure

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velocity of gas

pressure intensity of gas

pressure intensity of liquid

⇒ An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to

g/3

g/2

2g/3

g

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laminar flow

transition flow

turbulent flow

critical flow

⇒ The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is

32 km

20 km

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⇒ Separation of flow occurs when.

the pressure intensity reaches a minimum

the cross-section of a channel is reduced

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all of the above

⇒ Viscosity of an oil changes with

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⇒ In series-pipe problems.

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the discharge is same through each pipe

a trial solution is not necessary

the discharge through each pipe is added to obtain total discharge

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Zero

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⇒ The ratio of friction drag to pressure drag is

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⇒ A body of weight W

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W

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A, B. C, any

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⇒ The ratio between inertia force and viscous force is called

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Froude's number

Weber's number

Euler's number

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Stable equilibrium

Neutral equilibrium

None of these