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4

The total head of a liquid particle in motion is equal to

A. Pressure head + kinetic head + potential head

B. Pressure head - (kinetic head + potential head)

C. Potential head - (pressure head + kinetic head)

D. Kinetic head - (pressure head + potential head)

Correct Answer :

A. Pressure head + kinetic head + potential head


Related Questions

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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

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 flow of water through the hole in the bottom of a wash basin is an example of

A. Steady flow

B. Uniform flow

C. Free vortex

D. Forced vortex

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4

One poise is equal to

A. 0.1 N-s/m2

B. 1 N-s/m2

C. 10 N-s/m2

D. 100 N-s/m2

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4

The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.

A. Decreases

B. Increases

C. Remain same

D. None of these

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4

Liquids transmit pressure equally in all the directions. This is according to

A. Boyle's law

B. Archimedes principle

C. Pascal's law

D. Newton's formula

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4

The difference of pressure between the inside and outside of a liquid drop is

A. p = T × r

B. p = T/r

C. p = T/2r

D. p = 2T/r

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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

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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 buoyancy depends upon the

A. Weight of the liquid displaced

B. Pressure with which the liquid is displaced

C. Viscosity of the liquid

D. Compressibility of the liquid

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4

If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be

A. Higher than the surface of liquid

B. The same as the surface of liquid

C. Lower than the surface of liquid

D. Unpredictable

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4

The Francis formula for the discharge over Cipoletti weir is

A. 1.84 LH1/2

B. 1.84 LH

C. 1.84 LH3/2

D. 1.84 LH5/2

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4

A nozzle is generally made of

A. Cylindrical shape

B. Convergent shape

C. Divergent shape

D. Convergent-divergent shape

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4

The torque required to overcome viscous resistance of a footstep bearing is (where μ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)

A. μπ²NR/60t

B. μπ²NR²/60t

C. μπ²NR³/60t

D. μπ²NR⁴/60t

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4

The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to

A. Buoyancy

B. Equilibrium of a floating body

C. Archimedes' principle

D. Bernoulli's theorem

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4

Normal depth in open channel flow is the depth of flow corresponding to

A. Steady flow

B. Unsteady flow

C. Laminar flow

D. Uniform flow

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4

A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because

A. It is easier to see through the glass tube

B. Glass tube is cheaper than a metallic tube

C. It is not possible to conduct this experiment with any other tube

D. All of the above

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4

The flow in which each liquid particle has a definite path and their paths do not cross each other is called

A. One dimensional flow

B. Streamline flow

C. Steady flow

D. Turbulent flow

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4

An object having 10 kg mass weighs 9.81 kg on a spring balance. The value of 'g' at this place is

A. 10 m/sec²

B. 9.81 m/sec²

C. 9.75 m/sec²

D. 9 m/sec

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4

When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure __________ that if the same plate is immersed perpendicular to the flow.

A. Less than

B. More than

C. Equal to

D. None of these

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4

When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of

A. A triangle

B. A paraboloid

C. An ellipse

D. None of these

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4

A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is

A. 4.5 kN/m3

B. 6 kN/m3

C. 7.5 kN/m3

D. 10 kN/m3

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4

Coefficient of velocity is defined as the ratio of

A. Actual velocity of jet at vena contracta to the theoretical velocity

B. Area of jet at vena contracta to the area of orifice

C. Actual discharge through an orifice to the theoretical discharge

D. None of the above

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4

The centre of gravity of the volume of the liquid displaced by an immersed body is called

A. Centre of gravity

B. Centre of pressure

C. Metacentre

D. Centre of buoyancy

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4

The unit of surface tension is

A. N/m

B. N/m2

C. N/m3

D. N-m

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4

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

Liquids

A. Cannot be compressed

B. Occupy definite volume

C. Are not affected by change in pressure and temperature

D. None of the above

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4

A flow is called super-sonic if the

A. Velocity of flow is very high

B. Discharge is difficult to measure

C. Mach number is between 1 and 6

D. None of these

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4

A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is

A. 2.89 kN

B. 8.29 kN

C. 9.28 kN

D. 28.9 kN

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4

When a body is placed over a liquid, it will float if

A. Gravitational force is equal to the up-thrust of the liquid

B. Gravitational force is less than the up-thrust of the liquid

C. Gravitational force is more than the up-thrust of the liquid

D. None of the above