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Q1. | Two pieces of metal when immersed in a liquid have equal upthrust on them, then |

A. | Both pieces must have equal weig.hts [Wrong Answer] |

B. | Both pieces must have equal densities [Wrong Answer] |

C. | Both pieces must have equal volumes [Correct Answer] |

D. | Both are floating to the same depth [Wrong Answer] |

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

⇒ If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is.

less than 1

between 1 and 100

160

200

⇒ An ideal fluid is

one which obeys Newton's law of viscosity

frictionless and incompressible

very viscous

frictionless and compressible

⇒ 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

⇒ The horizontal to vertical side slope in case of cippoletti weir ?

1 : 1

1 : 4

1 : 2

4 : 1

⇒ The unit of kinematic viscosity is

gm/cm-sec2

dyne-sec/cm2

gm/cm2-sec

cm2/sec

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

Nappe

Crest

Height of weir/notch

Sill

⇒ Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is.

less than d

between d and 1.5 d

between 1.5 d and 2d

greater than 2d

⇒ The horizontal component of force on a curved surface is equal to the

product of pressure intensity at its centroid and area

force on a vertical projection of the curved surface

weight of liquid vertically above the curved surface

force on the horizontal projection of the curved surface

⇒ 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

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

mass

energy

momentum

none of the above

⇒ A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of

3.75 m

4.0 m

4.2m

4.5m

⇒ The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as.

center of gravity

center of buoyancy

center of pressure

metacentre

⇒ The pressure at the summit of a syphon is

equal to atmospheric

less than atmospheric

more than atmospheric

none of the above

⇒ The friction drag is more than pressure drag for

A sphere

A streamlined body

A circular disc placed normal to the flow direction

An air foil

⇒ Select the incorrect statement.

The pressure intensity at vena contracta is atmospheric.

Contraction is least at vena contracta.

Stream lines are parallel throughout the jet at vena contracta.

Coefficient of contraction is always less than one.

⇒ 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

⇒ 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

⇒ Two throw reciprocating pump means

Double cylindrical pump

Double acting pump

Duplex double acting pump

Single acting pump

⇒ When a ship floats on water

It displaces no water

The weight of water displaced is equal to the weight of the ship

The weight of water displaced is lesser than the weight of the ship

The weight of water displaced is greater than the weight of the ship

⇒ 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

⇒ When the metacentre of a floating body is lower than the centre of gravity, then the body will be in

Unstable equilibrium

Stable equilibrium

Neutral equilibrium

None of these

⇒ 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

⇒ Size of a venturimeter is specified by

pipe diameter

throat diameter

angle of diverging section

both pipe diameter as well as throat diameter

⇒ In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is.

22.5 m/sec.

33 m/sec.

40 m/sec.

90 m/sec.

⇒ 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.

⇒ 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

⇒ Manometer is used to measure

Velocity of liquid

Atmospheric pressure

Pressure in pipe and channels

Pressure in venturimeter

⇒ Which of the following velocity potentials satisfies continuity equation ?

x2y

x2-y2

cosx

x2 + y2

⇒ 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