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Q1. | As compared to laminar flow, in turbulent flow, boundary layers will be |

A. | Thinner [Wrong Answer] |

B. | Thicker [Correct Answer] |

C. | Same [Wrong Answer] |

D. | Half [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ 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

⇒ A wooden cylinder floats vertically in water with half of its length immersed. The density of wood is

Equal to that of water

Half the density of water

Double the density of water

The question is incomplete

⇒ A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be

less than 1 m/sec

1 m/sec

1.5 m/sec

2 m/sec

⇒ The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is.

0.223 R

0.423 R

0.577 R

0.707 R

⇒ If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is

1

4/3

2

4

⇒ 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

⇒ Which of the following is an incorrect statement ?

Coefficient of contraction of a venturimeter is unity.

Flow nozzle is cheaper than venturimeter but has higher energy loss

Discharge is independent of orientation of venturimeter whether it is horizontal, vertical or inclined.

None of the above statement is correct.None of the above statement is correct.

⇒ If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be.

from reservoir A to reservoirs B and C

from reservoir B to reservoirs C and A

from reservoir C to reservoirs A and B

unpredictable

⇒ 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 correct relationship among displacement thickness d, momentum thickness m and energy thickness e is.

d > m > e

d > e > m

e > m > d

e > d > m

⇒ For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be

300

337.5

600

675

⇒ Which of the following has highest coefficient of discharge ?

sharp edged orifice

venturimeter

Borda's mouthpiece running full

CipoUetti weir

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

0.611

0.707

0.855

1.00

⇒ The losses are more in

laminar flow

transition flow

turbulent flow

critical flow

⇒ The weight per unit volume of a liquid at a standard temperature and pressure is called

Specific weight

Mass density

Specific gravity

None of these

⇒ The principle of operation of Brahma's press is based on

Boyle's law

Pascal's law

Dalton's law

Newton's law

⇒ 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

⇒ If weir is used as a spillway it will have a crest

Ogee shaped

Broad and flat

Narrow

Cippolet

⇒ The maximum thickness of boundary layer in a pipe of radius r is

0

r/2

r

2r

⇒ In open channel water flows under

Force of gravity

Atmospheric pressure

Hydrostatic pressure

Mechanical pressure

⇒ If there were a smaller gfavitational effect, which of the following forces do you think would alter in some respect ?

Viscous force

Archimedes uplift

Electrostatic force

Nuclear force

⇒ Which of the following velocity potentials satisfies continuity equation ?

x2y

x2-y2

cosx

x2 + y2

⇒ For a body floating in water the apparent weight is equal to

Actual weight of the body

Zero

Weight of the body minus weight of the liquid

None of the above

⇒ The theoretical value of coefficient of contraction of a sharp edged orifice is

0.611

0.85

0.98

1.00

⇒ As ideal fluid is

One which obeys Newton's law of viscosity

One which satisfies continuity equation

One which flows through pipes with least friction

Frictionless and incompressible

⇒ When a body is weighed in a liquid, the loss in its weight depends upon

Volume of the body

Mass of the body

Shape of the body

CG of the body

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

Stream lined bodies

Bluft bodies

Both (A) and (B)

None of the above

⇒ 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

⇒ The concept of boundary layer was first introduced by

Newton

Prandtl

Reynold

Kutter

⇒ 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