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Q1. | With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on. |

A. | a circular disc of plate held normal to flow [Correct Answer] |

B. | a sphere [Wrong Answer] |

C. | a cylinder [Wrong Answer] |

D. | a streamlined body [Wrong Answer] |

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

⇒ An aeroplane works on

Archimedes' principle

Pascal's law

Bernoulli's principle

Stoke's law

⇒ A barometer is used to measure

Very low pressure

Very high pressure

Pressure difference between two points

Atmospheric pressure

⇒ A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is

5kN

10kN

15 kN

20 kN

⇒ The pressure drag depends upon

The boundary layer formation

The separation of boundary layer

The size of wake

Both (B) and (C) above

⇒ The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is

constant over the cross section

parabolic distribution across the section

zero at the mid plane and varies linearly with distance from mid plane

zero at plates and increases linearly to midpoint

⇒ The buoyancy depends upon the

Pressure with which the liquid is displaced

Weight of the liquid displaced

Viscosity of the liquid

Compressibility of the liquid

⇒ The point at which the resultant pressure on an immersed surface acts is known as

Centre of gravity

Centre of depth

Centre of pressure

Centre of immersed surface

⇒ Action of a point-gun is based on

Bernoulli's principle

Boyle's law

Faraday's law

Archimedes' principle

⇒ In series-pipe problems.

the head loss is same through each pipe

the discharge is same through each pipe

a trial solution is not necessary

the discharge through each pipe is added to obtain total discharge

⇒ Flow in a pipe is laminar if the Reynold's number is

Less than 2000

Between 2000 and 4000

Between 4000 and 6000

Equal to 10000

⇒ Metacentric height for small values of angle of heel is the distance between the

centre of gravity and centre of buoy-ancy

centre of gravity and metacentre

centre of buoyancy and metacentre

free surface and centre of buoyancy

⇒ The power channel that extends from the intake works to the power house is called

Lead race

Head race

Diversion canal

Penstock

⇒ In open channel water flows under

Force of gravity

Atmospheric pressure

Hydrostatic pressure

Mechanical pressure

⇒ 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

⇒ Metacentric height for small values of angle of heel is the distance between the.

centre of gravity and centre of buoy-ancy

centre of gravity and metacentre

centre of buoyancy and metacentre

free surface and centre of buoyancy

⇒ Hot wire anemometer is used to measure.

discharge

velocity of gas

pressure intensity of gas

pressure intensity of liquid

⇒ 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

⇒ Magnus effect is very near to the

Magnetic field

Electric field

Bernoulli's theorem

Magnetic effect of current

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

can be zero

is never zero

is always zero

is independent of coordinates

⇒ Coefficient of velocity for Borda's mouth piece running full is

0.611

0.707

0.855

1.00

⇒ Newton's law of viscosity relates.

intensity of pressure and rate of angular deformation

shear stress and rate of angular deformation

shear stress, viscosity and temperature

viscosity and rate of angular deformation

⇒ A gale blows over a house. The force due to the gale on the roof is

Downward

Upward

Horizontal

Zero

⇒ Pascal-second is the unit of.

pressure

kinematic viscosity

dynamic viscosity

surface tension

⇒ The eddy viscosity for turbulent flow is

a function of temperature only

a physical property of the fluid.

dependent on the flow

independent of the flow

⇒ Two throw reciprocating pump means

Double cylindrical pump

Double acting pump

Duplex double acting pump

Single acting pump

⇒ The friction drag is caused by

Separation of boundary layer

Pressure distribution over the body surface

Shear stress generated due to viscous action

All of the above

⇒ The sheet of water flowing through a notch or over a weir is known as

Nappe

Crest

Height of weir/notch

Sill

⇒ The viscosity of a gas.

decreases with increase in temperature

increases with increase in temperature

is independent of temperature

is independent of pressure for very high pressure intensities

⇒ Stream lines and path lines always coincide in case of.

steady flow

steady flow

uniform flow

turbulent flow

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

sudden enlargement

sudden contraction

gradual contraction or enlargement

friction