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Q1. | In a forced vortex motion, the velocity of flow is |

A. | directly proportional to its radial distance from axis of rotation [Correct Answer] |

B. | inversely proportional to its radial distance from the axis of rotation [Wrong Answer] |

C. | inversely proportional to the square of its radial distance from the axis of rotation [Wrong Answer] |

D. | directly proportional to the square of its radial distance from the axis of rotation [Wrong Answer] |

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

⇒ A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is.

zero

one-fourth its value when cylinder was full

one-half its value when cylinder was full

cannot be predicted from the given data

⇒ The Euler's equation for steady flow of an ideal fluid along a stream line is based on Newton's

First law of force

Second law of motion

Third law of momentum

Law of friction

⇒ The relationship dp/dx = dz/dy is valid for

Irrotational flow

Non-uniform flow

Uniform flow

Unsteady flow

⇒ Bernoulli's equation is applied to

Venturimeter

Orifice meter

Pitot tube

All of these

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

Half

Equal

Double

Triple

⇒ In a single acting reciprocating putnp, water is delivered in

Suction stroke

Delivery stroke

Middle of suction stroke

Middle of delivery stroke

⇒ Drag and lift forces actimg on an object placed is a fluid stream are caused by

Pressure and viscosity

Pressure and gravity

Pressure and turbulence

Viscosity and turbulence

⇒ The continuity equation

pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid.

steady flow

uniform flow

incompressible flow

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⇒ As a bubble comes from the bottom of a lake to the top, its radius

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⇒ Which of the following velocity potentials satisfies continuity equation ?

x2y

x2-y2

cosx

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

1/2

2/3

3/2

2

⇒ The bodies which have definite separation points fixed by their shapes are known as

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Transition flow

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⇒ The increase in meta centric height.

i) increases stability

ii) decreases stability

iii) increases comfort for passengers

iv) decreases comfort for passengers

The correct answer is

(i) and (iii)

(i)and(iv)

(ii) and (iii)

(ii) and (iv)

⇒ A body in neutral equilibrium will rotate about

Centre of gravity and metacentre

Centre of pressure and metacentre

Centre of gravity and centre of buoyancy

Centre of gravity, centre of buoyancy and metacentre

⇒ As compared to laminar flow, in turbulent flow, boundary layers will be

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Thicker

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⇒ The hydraulic grade line is.

always above the centre line of pipe

never above the energy grade line

always sloping downward in the direction of flow

all of the above

⇒ An ice cube containing a lead piece in it is floating in a glass of water. As ice melts the water level will

Fall

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None of the above

⇒ A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is

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one-half its value when cylinder was full

cannot be predicted from the given data

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

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is never zero

is always zero

is independent of coordinates

⇒ If a vessel containing liquid moves downward with a constant acceleration equal to 'g' then

the pressure throughout the liquid mass is atmospheric

there will be vacuum in the liquid

the pressure in the liquid mass is greater than hydrostatic pressure

none of the above

⇒ Size of a venturimeter is specified by

pipe diameter

throat diameter

angle of diverging section

both pipe diameter as well as throat diameter

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less than 1

between 1 and 100

160

200

⇒ The water jet after striking a stationary flat plate will be deflected at an angle of

60°

90°

110°

135°

⇒ The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to.

PA

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pA cos 9

pA tan 9

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

1 : 1

1 : 4

1 : 2

4 : 1

⇒ The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is.

1/3

1/4

1/2

2/3

⇒ A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be

1 m

10m

100m

none of the above

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center of gravity

center of buoyancy

center of pressure

metacentre

⇒ Surge wave in a rectangular channel is an example of

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ii) unsteady flow

iii) uniform flow

iv) non-uniform flow

The correct answer is

(i) and (iii)

(ii) and (iii)

(i) and (:v)

(ii) and (iv)