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Q1. | The sheet of water flowing through a notch or over a weir is known as |

A. | Nappe [Correct Answer] |

B. | Crest [Wrong Answer] |

C. | Height of weir/notch [Wrong Answer] |

D. | Sill [Wrong Answer] |

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Explanation:-
Answer : ADiscuss 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 :**

⇒ In which of the following the friction drag is generally larger than pressure drag?

a circular disc or plate held normal to flow

a sphere

a cylinder

an airfoil

⇒ In order to avoid cavitation the upstream edge of broad crested weir should have

Rounded corner

Sharp corner

Parabolic corner

None of these

⇒ 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

⇒ 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

⇒ Coefficient of velocity of venturimeter.

is independent of Reynolds number

decreases with higher Reynolds number

is equal to the coefficient of discharge of venturimeter

none of the above

⇒ An ideal fluid is.

one which obeys Newton's law of viscosity

frictionless and incompressible

very viscous

frictionless and compressible

⇒ 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

⇒ If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is.

0.25

0.50

1.0

none of the above

⇒ Which of the following statements is correct?

Lower critical Reynolds number is of no practical significance in pipe flow problems.

Upper critical Reynolds number is significant in pipe flow problems.

Lower critical Reynolds number has the value 2000 in pipe flow

Upper critical Reynolds number is the number at which turbulent flow changes to laminar flow.

⇒ 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

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

Thinner

Thicker

Same

Half

⇒ A barometer is used to measure

Very low pressure

Very high pressure

Pressure difference between two points

Atmospheric pressure

⇒ 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

⇒ Coefficient of contraction for an external cylindrical mouthpiece is

1.00

0.855

0.7H

0.611

⇒ The valve provided in a suction pipe is called

Float valve

Gate valve

Foot valve

Two-way valve

⇒ 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 speed of a pressure wave through a pipe depends upon

the length of pipe

the viscosity of fluid

the bulk modulus for the fluid

the original head

⇒ 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

⇒ 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 discharge for a totally submerged orifice as compared to that for an orifice discharging free is

slightly less

slightly more

nearly half

equal

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

1/2

2/3

3/2

2

⇒ 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

⇒ If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will.

rise until its weight equals the buoyant force

tend to move downward and it may finally sink

float

none of the above

⇒ The specific gravity of water at standard temperature (4°C) equals to

0.999

1.000

1.010

0.500

⇒ 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 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

⇒ The unit of kinematic viscosity is.

gm/cm-sec2

dyne-sec/cm2

gm/cm2-sec

cm2/sec

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

60°

90°

110°

135°

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

current meter

venturimeter

pitot tube

hotwire anemometer

⇒ 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