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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 :**

⇒ The velocity distribution for laminar flow through a circular tube

is constant over the cross-section

varies linearly from zero at walls to maximum at centre

varies parabolically with maximum at the centre

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.

⇒ Specific speed is

Dimensionless

Measured in rev/min.

A speed

A shape factor

⇒ If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is

4/3

3/2

9/4

27/8

⇒ In a free vortex, velocity

Decreases with radius

Increase with radius

Is constant

None of these

⇒ 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

⇒ The losses are more in

laminar flow

transition flow

turbulent flow

critical flow

⇒ Stanton diagram is a

log-log plot of friction factor against Reynolds number

log-log plot of relative roughness against Reynolds number

semi-log plot of friction factor against Reynolds number

semi-log plot of friction factor against relative roughness

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

Rise

Sink

Remain where left

None of the above

⇒ 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

⇒ 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 velocity distribution for laminar flow through a circular tube.

is constant over the cross-section

varies linearly from zero at walls to maximum at centre

varies parabolically with maximum at the centre

none of the above

⇒ 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

⇒ 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

⇒ 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 variation in volume of a liquid with the variation of pressure is called its

Surface tension

Compressibility

Capillarity

Viscosity

⇒ The unit of kinematic viscosity is

gm/cm-sec2

dyne-sec/cm2

gm/cm2-sec

cm2/sec

⇒ Centre of buoyancy always.

coincides with the centre of gravity

coincides with the centroid of the volume of fluid displaced

remains above the centre of gravity

remains below the centre of gravity

⇒ 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

⇒ Across the boundary layer, pressure remains

More

Less

Constant

Zero

⇒ 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

⇒ 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

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

Thinner

Thicker

Same

Half

⇒ 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

⇒ When a piece of ice floating in a beaker of water completely melts, the level of water in the beaker

Rises

Falls

Remains unchanged

Rises or falls depending upon the quantity of ice and water

⇒ Equation of continuity is based on the principle of conservation of

mass

energy

momentum

none of the above

⇒ 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

⇒ A man is sitting in a boat which is floating in a pond. If the man drinks some water from the pond, the level of water in the pond will

Rise a little

Sink a little

Remain stationary

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

zero

one-fourth its value when cylinder was full

one-half its value when cylinder was full

cannot be predicted from the given data