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4

When a body floating in a liquid, is displaced slightly, it oscillates about

A. C.G. of body

B. Center of pressure

C. Center of buoyancy

D. Metacentre

Correct Answer :

D. Metacentre


Related Questions

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4

Falling drops of water become spheres due to the property of

A. Adhesion

B. Cohesion

C. Surface tension

D. Viscosity

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4

The pressure 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

Kinematic viscosity is dependent upon

A. Pressure

B. Distance

C. Density

D. Flow

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The dynamic viscosity of gases __________ with rise in temperature.

A. Remain unaffected

B. Increases

C. Decreases

D. None of these

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4

The Bernoulli's equation is based on the assumption that

A. There is no loss of energy of the liquid flowing

B. The velocity of flow is uniform across any cross-section of the pipe

C. No force except gravity acts on the fluid

D. All of the above

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4

A flow through a long pipe at decreasing rate is called __________ uniform flow.

A. Steady

B. Unsteady

C. Both A and B

D. None of these

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4

The normal stress is same in all directions at a point in a fluid

A. Only when the fluid is frictionless

B. Only when the fluid is incompressible and has zero viscosity

C. When there is no motion of one fluid layer relative to an adjacent layer

D. Irrespective of the motion of one fluid layer relative to an adjacent layer

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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)

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4

Surface tension has the units of

A. Newton-sec/m

B. Newton-m/sec

C. Newton/m

D. Newton

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4

The flow which neglects changes in a transverse direction is known as

A. One dimensional flow

B. Uniform flow

C. Steady flow

D. Turbulent flow

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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

The time oscillation of a floating body with increase in meatcentric height will be

A. Same

B. Higher

C. Lower

D. Lower/higher depending on weight of body

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4

The ratio of the inertia force to the elastic force is called

A. Reynold's number

B. Froude's number

C. Weber's number

D. Mach number

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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

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

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

The specific gravity of an oil whose specific weight is 7.85 kN/m3, is

A. 0.8

B. 1

C. 1.2

D. 1.6

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4

The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

A. Surface tension

B. Compressibility

C. Capillarity

D. Viscosity

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4

The pressure of liquid at throat in a Venturimeter is __________ than that at inlet.

A. Higher

B. Lower

C. Same

D. None of these

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4

The pressure of a liquid measured with the help of a Piezometer tube is

A. Vacuum pressure

B. Gauge pressure

C. Absolute pressure

D. Atmospheric pressure

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4

The pressure measured with the help of a Piezometer tube is in

A. N/mm2

B. N/m2

C. Head of liquid

D. All of these

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4

A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is

A. 1

B. 5

C. 7

D. 6

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4

The two important forces for a floating body are

A. Buoyancy, gravity

B. Buoyancy, pressure

C. Buoyancy, inertial

D. Inertial, gravity

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4

The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to

A. 2100

B. 2700

C. 10,000

D. 21,000

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4

The angle of contact in case of a liquid depends upon

A. The nature of the liquid and the solid

B. The material which exists above the free surface of the liquid

C. Both of die above

D. Any one of the above

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4

Rain drops are spherical because of

A. Viscosity

B. Air resistance

C. Surface tension forces

D. Atmospheric pressure

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4

The speed of sound in a ideal gas varies directly as its

A. Absolute temperature

B. Temperature

C. Density

D. Modulus of elasticity

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Practical fluids

A. Are viscous

B. Possess surface tension

C. Are compressible

D. Possess all the above properties

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4

The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.

A. Less than

B. More than

C. Equal to

D. None of these

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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