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4

A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?

A. The pressure on the wall at the liquid level is minimum

B. The pressure on the bottom of the wall is maximum

C. The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum

D. The pressure on the bottom of the wall is zer

Correct Answer :

C. The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum


Related Questions

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When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.

A. Sum

B. Difference

C. Arithmetic mean

D. Geometric mean

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4

In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be

A. Double

B. Four times

C. Eight times

D. Sixteen times

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4

Mach number is significant in

A. Supersonics, as with projectiles and jet propulsion

B. Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.

C. Simultaneous motion through two fluids where there is a surface of discontinuity, gravity force, and wave making effects, as with ship's hulls

D. All of the above

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4

The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is

A. ρ ω2 r2

B. 2ρ ω2 r2

C. ρ ω2 r2/2

D. ρ ω2 r2/4

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4

The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)

A. K.ρ

B. K/ρ

C. ρ/K

D. None of these

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4

The absolute pressure is equal to

A. Gauge pressure + atmospheric pressure

B. Gauge pressure - atmospheric pressure

C. Atmospheric pressure - gauge pressure

D. Gauge pressure - vacuum pressure

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4

The liquid used in manometers should have

A. Low density

B. High density

C. Low surface tension

D. High surface tension

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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

Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called

A. Adhesion

B. Cohesion

C. Viscosity

D. Compressibility

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4

The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.

A. Plus

B. Minus

C. Divide

D. None of these

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4

A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?

A. The pressure on the wall at the liquid level is minimum

B. The pressure on the bottom of the wall is maximum

C. The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum

D. The pressure on the bottom of the wall is zer

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4

When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called

A. Gauge pressure

B. Absolute pressure

C. Positive gauge pressure

D. Vacuum pressure

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4

The discharge in an open channel corresponding to critical depth is

A. Zero

B. Minimum

C. Maximum

D. None of these

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4

A perfect gas

A. Has constant viscosity

B. Has zero viscosity

C. Is in compressible

D. None of the above

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4

In an immersed body, centre of pressure is

A. At the centre of gravity

B. Above the centre of gravity

C. Below be centre of gravity

D. Could be above or below e.g. depending on density of body and liquid

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4

The maximum efficiency of transmission through a pipe is

A. 50 %

B. 56.7 %

C. 66.67 %

D. 76.66 %

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4

The shear stress-strain graph for a Newtonian fluid is a

A. Straight line

B. Parabolic curve

C. Hyperbolic curve

D. Elliptical

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4

Froude number is significant in

A. Supersonics, as with projectile and jet propulsion

B. Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.

C. Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect as with ship's hulls

D. All of the above

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4

The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to

A. 1/2 × depth

B. 1/2 × breadth

C. 1/2 × sloping side

D. 1/4 × (depth + breadth)

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4

The flow in which conditions do not change with time at any point, is known as

A. One dimensional flow

B. Uniform flow

C. Steady flow

D. Turbulent flow

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4

A body floating in a liquid is said to be in neutral equilibrium, if its metacentre

A. Coincides with its centre of gravity

B. Lies above its centre of gravity

C. Lies below its centre of gravity

D. Lies between the centre of buoyancy and centre of gravity

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4

When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

A. 1.84 (L - 0.1nH)H3/2

B. 1.84 (L - nH)H2

C. 1.84 (L - 0.1nH)H5/2

D. 1.84 (L - nH)H3

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4

Pitot tube is used for measurement of

A. Pressure

B. Flow

C. Velocity

D. Discharge

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4

For a floating body to be in equilibrium

A. Meta centre should be above e.g.

B. Centre of buoyancy and e.g. must lie on same vertical plane

C. A righting couple should be formed

D. All of the above

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4

The pressure at a point 4 m below the free surface of water is

A. 19.24 kPa

B. 29.24 kPa

C. 39.24 kPa

D. 49.24 kPa

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4

A Piezometer tube is used only for measuring

A. Low pressure

B. High pressure

C. Moderate pressure

D. Vacuum pressure

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If no resistance is encountered by displacement, such a substance is known as

A. Fluid

B. Water

C. Gas

D. Ideal fluid

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Ratio of inertia force to surface Jension is known as

A. Mach number

B. Froude number

C. Reynoldss number

D. Weber's number

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4

The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

A. v₁²/2g

B. v₂²/2g

C. 0.5 v₁²/2g

D. 0.375 v₂²/2g

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4

When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as

A. Steady flow

B. Turbulent flow

C. Vortex flow

D. Uniform flow