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Q1. | If in a satellite orbiting the earth, a cork is immersed in a jar of water and released, it will |

A. | Rise [Wrong Answer] |

B. | Sink [Wrong Answer] |

C. | Remain where left [Correct Answer] |

D. | None of the above [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss it below :Karan Nijhawan Said on 2019-11-04 23:19:59Rise !! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ 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 unit of kinematic viscosity is.

gm/cm-sec2

dyne-sec/cm2

gm/cm2-sec

cm2/sec

⇒ A boat with scrap iron is floating in a lake. If the scrap iron is thrown in the lake the water level will

Go up

Go down

Remain unchanged

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

⇒ The pitot tube is used to measure.

velocity at stagnation point

stagnation pressure

static pressure

dynamic pressure

⇒ The basic equation which governs the motion of incompressible viscous fluid in laminar motion is called as

Hagen-Poiseullie equation

Stokes equation

Darcy-Weisbach equation

Navier-Stokes equation

⇒ 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

⇒ The discharge through a V- notch varies as.

H1/2

H3'2

H5/2

H5'4 where H is head.

⇒ The concept of boundary layer was first introduced by

Newton

Prandtl

Reynold

Kutter

⇒ A cubical tank is filled with water. If side of tank is 1 m pressure on the base of the tank will be

10000 kg

5000 kg

1000 kg

4000 kg

⇒ In an open channel flow the discharge corresponding to critical depth is

Minimum

Maximum

Zero

Average

⇒ Coefficient of contraction for an external cylindrical mouthpiece is

1.00

0.855

0.7H

0.611

⇒ In a free vortex, velocity

Decreases with radius

Increase with radius

Is constant

None of these

⇒ Cavitation causes damage in turbine runner near the

Inlet on the concave side of blades

Inlet on the convex side of blades

Outlet on the convex side of blades

Outlet on the concave side of blades

⇒ In a water wheel when water enters the buckets mounted on the periphery of a wheel at its top, then it will be known as

Over shot wheel

Breast water wheel

Under shot wheel

Pelton-wheel

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

Nappe

Crest

Height of weir/notch

Sill

⇒ The specific speed of a Francis turbine is in the rangse

10 to 35

35 to 60

60 to 400

300 to 1200

⇒ 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

⇒ A floating body is said to be in a state of stable equilibrium.

when its metacentric height is zero

when the metacentre is above the centre of gravity

when the metacentre is below the centre of gravity

only when its centre of gravity is below its centre of buoyancy

⇒ 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

⇒ Two pieces of metal when immersed in a liquid have equal upthrust on them, then

Both pieces must have equal weig.hts

Both pieces must have equal densities

Both pieces must have equal volumes

Both are floating to the same depth

⇒ An ideal fluid is

one which obeys Newton's law of viscosity

frictionless and incompressible

very viscous

frictionless and compressible

⇒ When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies

linearly with radial distance

as the square of the radial distance

inversely as the square of the radial distance

inversely as the radial distance

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

steady flow

steady flow

uniform flow

turbulent flow

⇒ In a forced vortex motion, the velocity of flow is

directly proportional to its radial distance from axis of rotation

inversely proportional to its radial distance from the axis of rotation

inversely proportional to the square of its radial distance from the axis of rotation

directly proportional to the square of its radial distance from the axis of rotation

⇒ 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

⇒ 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

⇒ Specific speed of Pelton-wheels having single jet, varies between

10 to 35

10 to 50

60 to 400

300 to 1000

⇒ 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

⇒ Which of the following velocity potentials satisfies continuity equation ?

x2y

x2-y2

cosx

x2 + y2