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4

A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is

A. 3.53 kN

B. 33.3 kN

C. 35.3 kN

D. None of these

Correct Answer :

C. 35.3 kN


Related Questions

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4

Water is a __________ fluid.

A. Real

B. Ideal

C. Newtonian

D. Non-Newtonian

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4

Kinematic viscosity is equal to

A. Dynamic viscosity/density

B. Dynamic viscosity × density

C. Density/dynamic viscosity

D. 1/dynamic viscosity × density

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4

According to Bazin's formula, the discharge over a rectangular weir is mL2g x H3/2where m is equal to

A. 0.405 + (0.003/H)

B. 0.003 + (0.405/H)

C. 0.405 + (H/0.003)

D. 0.003 + (H/0.405)

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4

Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure.

A. Plus

B. Minus

C. Divide

D. Multiply

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A thick liquid like syrup has a __________ viscosity than a light liquid like water.

A. Lesser

B. Greater

C. Same

D. None of these

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4

Piezometer is used to measure

A. Pressure in pipe, channels etc.

B. Atmospheric pressure

C. Very low pressures

D. Difference of pressure between two points

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4

A structure used to dam up a stream or river over which the water flows is called

A. Orifice

B. Notch

C. Weir

D. Dam

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The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.

A. One-half

B. One-third

C. Two-third

D. None of these

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4

An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.

A. Free

B. Partially

C. Full

D. None of these

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4

An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of

A. 1

B. 1.2

C. 0.8

D. 0.75

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4

For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called

A. Continuity equation

B. Bernoulli's equation

C. Pascal's law

D. Archimedess principle

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4

The viscosity of water at 20°C is

A. One stoke

B. One centistoke

C. One poise

D. One centipoise

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4

Center of buoyancy is the

A. Centroid of the displaced volume of fluid

B. Center of pressure of displaced volume

C. Does not exist

D. None of the above

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4

Which of the following instrument can be used for measuring speed of a submarine moving in deep sea?

A. Venturimeter

B. Orifice plate

C. Hot wire anemometer

D. Pitot tube

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4

In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be

A. Running full

B. Running free

C. Partially running full

D. Partially running free

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4

The height of a water column equivalent to a pressure of 0.15 MPa is

A. 15.3 m

B. 25.3 m

C. 35.3 m

D. 45.3 m

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4

According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.

A. Equal to

B. Directly proportional

C. Inversely proportional

D. None of these

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4

The intensity of pressure at any point, in a liquid, is

A. Directly proportional to the area of the vessel containing liquid

B. Directly proportional to the depth of liquid from the surface

C. Directly proportional to the length of the vessel containing liquid

D. Inversely proportional to the depth of liquid from the surface

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4

A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

A. 14π R1/2/15Cd × a √(2g)

B. 14π R3/2/15Cd × a √(2g)

C. 14π R5/2/15Cd × a √(2g)

D. 14π R7/2/15Cd × a √(2g)

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4

Choose the wrong statement

A. The horizontal component of the hydrostatic force on any surface is equal to the normal force on the vertical projection of the surface

B. The horizontal component acts through the center of pressure for the vertical projection

C. The vertical component of the hydrostatic force on any surface is equal to the weight of the volume of the liquid above the area

D. The vertical component passes through the center of pressure of the volume

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4

The velocity of the liquid flowing through the divergent portion of a Venturimeter

A. Remains constant

B. Increases

C. Decreases

D. Depends upon mass of liquid

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4

A streamline is defined as the line

A. Parallel to central axis flow

B. Parallel to outer surface of pipe

C. Of equal velocity in a flow

D. Along which the pressure drop is uniform

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4

The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is

A. 0.0116 stoke

B. 0.116 stoke

C. 0.0611 stoke

D. 0.611 stoke

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4

The angle of contact in case of a liquid depends upon

A. The nature of the liquid and the solid

B. The material which exists above the free surface of the liquid

C. Both of die above

D. Any one of the above

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4

In a free vortex motion, the radial component of velocity everywhere is

A. Maximum

B. Minimum

C. Zero

D. Nonzero and finite

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The horizontal component of buoyant force is

A. Negligible

B. Same as buoyant force

C. Zero

D. None of the above

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4

The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as

A. Path line

B. Stream line

C. Steak line

D. Potential line

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4

Surface tension has the units of

A. Newton-sec/m

B. Newton-m/sec

C. Newton/m

D. Newton

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4

A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?

A. The metal piece will simply float over the mercury

B. The metal piece will be immersed in mercury by half

C. Whole of the metal piece will be immersed with its top surface just at mercury level

D. Metal piece will sink to the bottom

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4

Working principle of dead weight pressure gauge tester is based on

A. Pascal's law

B. Dalton's law of partial pressure

C. Newton's law of viscosity

D. Avogadro's hypothesis