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4

When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid

A. Remains horizontal

B. Becomes curved

C. Falls on the front end

D. Falls on the back end

Correct Answer :

C. Falls on the front end


Related Questions

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4

A fluid having no viscosity is known as

A. Real fluid

B. Ideal fluid

C. Newtonian fluid

D. Non-Newtonian fluid

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4

The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)

A. Q = Cd × a × 2gh

B. Q = (2/3). Cd × a × h

C. Q = (Cd × a)/√(2gh)

D. Q = (3Cd × a)/√(2h)

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4

Select the correct statement

A. Weber's number is the ratio of inertia force to elastic force.

B. Weber's number is the ratio of gravity force to surface tension force.

C. Weber's number is the ratio of viscous force to pressure force.

D. Weber's number is the ratio of inertia force to surface tension force.

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4

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

An ideal flow of any fluid must satisfy

A. Pascal law

B. Newton's law of viscosity

C. Boundary layer theory

D. Continuity equation

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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

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4

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

A. Half the depth

B. Half the breadth

C. Twice the depth

D. Twice the breadth

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4

The hammer blow in pipes occurs when

A. There is excessive leakage in the pipe

B. The pipe bursts under high pressure of fluid

C. The flow of fluid through the pipe is suddenly brought to rest by closing of the valve

D. The flow of fluid through the pipe is gradually brought to rest by closing of the valve

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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

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4

The viscosity of water is __________ than that of mercury.

A. Higher

B. Lower

C. Same as

D. None of these

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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

The discharge through a siphon spillway is

A. Cd × a × √(2gH)

B. Cd × a × √(2g) × H3/2

C. Cd × a × √(2g) × H2

D. Cd × a × √(2g) × H5/2

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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

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4

An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called

A. Weir

B. Notch

C. Orifice

D. None of these

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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

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 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

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

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4

Choose the correct relationship

A. Specific gravity = gravity × density

B. Dynamic viscosity = kinematic viscosity × density

C. Gravity = specific gravity × density

D. Kinematic viscosity = dynamic viscosity × density

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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

In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle θ. Sensitivity of inclined tube to sensitivity of Utube is equal to

A. Sinθ

B. 1/Sinθ

C. Cosθ

D. 1/Cosθ

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4

The velocity at which the laminar flow stops, is known as

A. Velocity of approach

B. Lower critical velocity

C. Higher critical velocity

D. None of these

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4

If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in

A. Neutral equilibrium

B. Stable equilibrium

C. Unstable equilibrium

D. None of these

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4

Poise is the unit of

A. Surface tension

B. Capillarity

C. Viscosity

D. Shear stress in fluids

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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

For manometer, a better liquid combination is one having

A. Higher surface tension

B. Lower surface tension

C. Surface tension is no criterion

D. High density and viscosity

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4

The normal stress in a fluid will be constant in all directions at a point only if

A. It is incompressible

B. It has uniform viscosity

C. It has zero viscosity

D. It is at rest

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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

The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is

A. μ π³ N² R² /1800 t

B. μ π³ N² R⁴ /1800 t

C. μ π³ N² R² /3600 t

D. μ π³ N² R⁴ /3600 t

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4

The velocity at which the flow changes from laminar flow to turbulent flow is called

A. Critical velocity

B. Velocity of approach

C. Sub-sonic velocity

D. Super-sonic velocity