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4

A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)

A. wH

B. wH/2

C. wH2/2

D. wH2/3

Correct Answer :

C. wH2/2


Related Questions

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4

A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is

A. 0.83

B. 0.6

C. 0.4

D. 0.3

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4

Uniform flow occurs when

A. The direction and magnitude of the velocity at all points are identical

B. The velocity of successive fluid particles, at any point, is the same at successive periods of time

C. The magnitude and direction of the velocity do not change from point to point in the fluid

D. The fluid particles move in plane or parallel planes and the streamline patterns are identical in each pleasure

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4

Bulk modulus of a fluid __________ as the pressure increases.

A. Remain same

B. Decreases

C. Increases

D. None of these

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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

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 property by virtue of which a liquid opposes relative motion between its different layers is called

A. Surface tension

B. Coefficient of viscosity

C. Viscosity

D. Osmosis

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4

A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.

A. Steady

B. Streamline

C. Turbulent

D. Unsteady

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4

Principle of similitude forms the basis of

A. Comparing two identical equipments

B. Designing models so that the result can be converted to prototypes

C. Comparing similarity between design and actual equipment

D. Hydraulic designs

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4

Manometer is used to measure

A. Pressure in pipes, channels etc.

B. Atmospheric pressure

C. Very low pressure

D. Difference of pressure between two points

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4

The coefficient of discharge for an external mouthpiece depends upon

A. Velocity of liquid

B. Pressure of liquid

C. Area of mouthpiece

D. Length of mouthpiece

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4

Two pipe systems can be said to be equivalent, when the following quantities are same

A. Friction loss and flow

B. Length and diameter

C. Flow and length

D. Friction factor and diameter

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4

The mercury does not wet the glass. This is due to the property of the liquid known as

A. Cohesion

B. Adhesion

C. Viscosity

D. Surface tension

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4

Metacentre is the point of intersection of

A. Vertical upward force through e.g. of body and center line of body

B. Buoyant force and the center line of body

C. Midpoint between e.g. and center of buoyancy

D. All of the above

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4

A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

A. (2A√H₁)/(Cd × a√2g)

B. (2AH₁)/(Cd × a√2g)

C. (2AH₁3/2)/(Cd × a√2g)

D. (2AH₁²)/(Cd × a√2g)

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4

The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.

A. Equal to

B. Less than

C. More than

D. None of these

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4

The velocity of jet of water travelling out of opening in a tank filled with water is proportional to

A. Head of water (h)

B.

C. V/T

D. h/2

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The ratio of absolute viscosity to mass density is known as

A. Specific viscosity

B. Viscosity index

C. Kinematic viscosity

D. Coefficient of viscosity

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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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4

Rotameter is a device used to measure

A. Absolute pressure

B. Velocity of fluid

C. Flow

D. Rotation

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4

The force of buoyancy is always __________ the weight of the liquid displaced by the body.

A. Equal to

B. Less than

C. More than

D. None of these

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4

Euler's dimensionless number relates the following

A. Inertial force and gravity

B. Viscous force and inertial force

C. Viscous force and buoyancy force

D. Pressure force and inertial force

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4

According to Bernoulli's equation for steady ideal fluid flow

A. Principle of conservation of mass holds

B. Velocity and pressure are inversely proportional

C. Total energy is constant throughout

D. The energy is constant along a streamline but may vary across streamlines

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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

A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal to

A. 10 kg

B. 100 kg

C. 1000 kg

D. 1 kg

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4

The total pressure on a horizontally immersed surface is (where w = Specific weight of the liquid, A = Area of the immersed surface, and x = Depth of the centre of gravity of the immersed surface from the liquid surface)

A. wA

B. wx

C. wAx

D. wA/x

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4

The centre of pressure acts __________ the centre of gravity of immersed surface.

A. At

B. Above

C. Below

D. None of these

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4

Hot wire anemometer is used to measure

A. Pressure in gases

B. Liquid discharge

C. Pressure in liquids

D. Gas velocities

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4

The velocity corresponding to Reynold number of 2000 is called

A. Sub-sonic velocity

B. Super-sonic velocity

C. Lower critical velocity

D. Higher critical velocity

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4

Falling drops of water become spheres due to the property of

A. Surface tension of water

B. Compressibility of water

C. Capillarity of water

D. Viscosity of water

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4

The line of action of the buoyant force acts through the Centroid of the

A. Submerged body

B. Volume of the floating body

C. Volume of the fluid vertically above the body

D. Displaced volume of the fluid