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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 :**

⇒ With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on.

a circular disc of plate held normal to flow

a sphere

a cylinder

a streamlined body

⇒ The discharge of a liquid of kinematic viscosity 4 cm2/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is

laminar flow

transition flow

turbulent flow

not predictable from the given data

⇒ 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.

⇒ In case of an airfoil, the separation of flow occurs

at the extreme rear of body

at the extreme front of body

midway between rear and front of body

any where between rear and front of body depending upon Reynolds number

⇒ The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is.

1/2

2/3

3/2

2

⇒ Pressure measured with the help of piezometer tube is

Atmospheric pressure

Gauge pressure

Absolute pressure

Vacuum pressure

⇒ The motion of air mass in a tornado is a.

free vortex motion

forced vortex motion

ree vortex at center and forced vortex outside

forced vortex at center and free vortex outside

⇒ The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is.

1/3 R

1/2 R

2/3 R

3/4R

⇒ For a flow to be turbulent in an open channel Reynold's number should not be less than

500

1000

1500

2000

⇒ Which of the following has highest coefficient of discharge ?

sharp edged orifice

venturimeter

Borda's mouthpiece running full

CipoUetti weir

⇒ In a free vortex, velocity

Decreases with radius

Increase with radius

Is constant

None of these

⇒ The horizontal to vertical side slope in case of cippoletti weir ?

1 : 1

1 : 4

1 : 2

4 : 1

⇒ When the flow in open channel is gradually varied, the flow is said to be

Steady uniform flow

Steady non-uniform flow

Unsteady uniform flow

Unsteady non-uniform flow

⇒ An aeroplane works on

Archimedes' principle

Pascal's law

Bernoulli's principle

Stoke's law

⇒ The wake

always occurs before a separation point

always occurs after a separation point

is a region of high pressure intensity

none of the above

⇒ In a Pelton-wheel, hydraulic efficiency will be maximum when speed of the buckets as compared to velocity of the jet will be

Equal

Double

Half

One fourth

⇒ When the depth of flow changes abruptly over a short distance, then the flow will be termed as

Rapidly varied flow

Unsteady flow

Gradually varied flow

Turbulent flow

⇒ Which of the following is used to measure the discharge ?

current meter

venturimeter

pitot tube

hotwire anemometer

⇒ The concept of boundary layer was first introduced by

Newton

Prandtl

Reynold

Kutter

⇒ 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

⇒ The valve provided in a suction pipe is called

Float valve

Gate valve

Foot valve

Two-way valve

⇒ As compared to flat plate force of jet on a semi-circular vane will be

Half

Equal

Double

Triple

⇒ The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is.

at the centroid of the submerged area

always above the centroid of the area

always below the centroid of the area

none of the above

⇒ The major loss of energy in long pipes is due to

sudden enlargement

sudden contraction

gradual contraction or enlargement

friction

⇒ Two pipe systems are said to be equivalent when

head loss and discharge are same in two systems

length of pipe and discharge are same in two systems

friction factor and length are same in two systems

length and diameter are same in two systems

⇒ Drag force is a function of

Velocity of the body

Mass density of the fluid

Projected area of the body

All of the above

⇒ For laminar flow in a pipe of circular cross-section, the Darcy's friction factor f is

directly proportional to Reynolds number and independent of pipe wall roughness

directly proportional to pipe wall roughness and independent of Reynolds number

inversely proportional to Reynolds number and indpendent of pipe wall roughness

inversely proportional to Reynolds number and directly proportional to pipe wall roughness

⇒ Equation of continuity is based on the principle of conservation of

mass

energy

momentum

none of the above

⇒ The velocity distribution for laminar flow through a circular tube

is constant over the cross-section

varies linearly from zero at walls to maximum at centre

varies parabolically with maximum at the centre

none of the above

⇒ 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