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4

For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal

A. Ratio of inertial force to force due to viscosity

B. Ratio of inertial force to force due to gravitation

C. Ratio of inertial force to force due to surface tension

D. All the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity

Correct Answer :

D. All the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity


Related Questions

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4

The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm. The pressure at 2.5 m below the oil surface will be

A. 2 metres of water column

B. 3 metres of water column

C. 3.5 metres of water column

D. 4 m of water column

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4

The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is

A. 200 kg/m3

B. 400 kg/m3

C. 600 kg/m3

D. 800 kg/m3

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4

In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)

A. p/sinα

B. 2p/sinα

C. p/2sinα

D. 2p/sin (α/2)

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4

A flow through an expanding tube at constant rate is called

A. Steady uniform flow

B. Steady non-uniform flow

C. Unsteady uniform flow

D. Unsteady non-uniform flow

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4

The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the submerged body is called

A. Up-thrust

B. Reaction

C. Buoyancy

D. Metacentre

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4

The stability of a dam is checked for

A. Tension at the base

B. Overturning of the wall or dam

C. Sliding of the wall or dam

D. All of these

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4

A fluid in equilibrium can't sustain

A. Tensile stress

B. Compressive stress

C. Shear stress

D. Bending stress

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4

The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)

A. w

B. wh

C. w/h

D. h/w

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4

In one dimensional flow, the flow

A. Is steady and uniform

B. Takes place in straight line

C. Takes place in curve

D. Takes place in one direction

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4

When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface.

A. Concave

B. Convex

C. Plane

D. None of these

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Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the

A. Force of adhesion

B. Force of cohesion

C. Force of friction

D. Force of diffusion

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The point at which the resultant pressure on an immersed surface acts, is known as

A. Centre of gravity

B. Centre of depth

C. Centre of pressure

D. Centre of immersed surface

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4

The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)

A. v²/2g

B. 0.5v²/2g

C. 0.375v²/2g

D. 0.75v²/2g

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4

The fluid forces considered in the Navier Stokes equation are

A. Gravity, pressure and viscous

B. Gravity, pressure and turbulent

C. Pressure, viscous and turbulent

D. Gravity, viscous and turbulent

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4

The product of mass and acceleration of flowing liquid is called

A. Inertia force

B. Viscous force

C. Gravity force

D. Pressure force

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The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called

A. Density of liquid

B. Specific gravity of liquid

C. Compressibility of liquid

D. Surface tension of liquid

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4

The flow in a pipe or channel is said to be non-uniform when

A. The liquid particles at all sections have the same velocities

B. The liquid particles at different sections have different velocities

C. The quantity of liquid flowing per second is constant

D. Each liquid particle has a definite path

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4

The Reynold's number of a ship is __________ to its velocity and length.

A. Directly proportional

B. Inversely proportional

C. Square root of velocity

D. None of these

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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 coefficient of venturi-flume, generally, lies between

A. 0.3 to 0.45

B. 0.50 to 0.75

C. 0.75 to 0.95

D. 0.95 to 1.0

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4

Re-entrant or Borda's mouthpiece is an __________ mouthpiece.

A. Internal

B. External

C. Both A and B

D. None of these

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4

Select the correct statement

A. Local atmospheric pressure depends upon elevation of locality only

B. Standard atmospheric pressure is the mean local atmospheric pressure a* sea level

C. Local atmospheric pressure is always below standard atmospheric pressure

D. A barometer reads the difference between local and standard atmospheric pressure

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4

The volumetric change of the fluid caused by a resistance is known as

A. Volumetric strain

B. Volumetric index

C. Compressibility

D. Adhesion

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4

An open vessel of water is accelerated up an inclined plane. The free water surface will

A. Be horizontal

B. Make an angle in direction of inclination of inclined plane

C. Make an angle in opposite direction to inclination of inclined plane

D. Any one of above is possible

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4

The specific weight of water is 1000 kg/m3

A. At normal pressure of 760 mm

B. At 4°C temperature

C. At mean sea level

D. All the above

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4

The weight per unit volume of a liquid at a standard temperature and pressure is called

A. Specific weight

B. Mass density

C. Specific gravity

D. None of these

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4

One litre of water occupies a volume of

A. 100 cm3

B. 250 cm3

C. 500 cm3

D. 1000 cm3

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4

Bernoulli's equation is applied to

A. Venturimeter

B. Orifice meter

C. Pitot tube

D. All of these

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4

An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch,

A. 1 %

B. 1.5 %

C. 2 %

D. 2.5 %

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4

Reynold's number is the ratio of the inertia force to the

A. Surface tension force

B. Viscous force

C. Gravity force

D. Elastic force