Related Questions
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4
The unit of viscosity is
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Choose the wrong statement. Alcohol is used in manometer, because
A. Its vapour pressure is low
B. It provides suitable meniscus for the inclined tube
D. It provides longer length for a given pressure difference
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4
When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.
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4
Pitot tube is used for measurement of
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With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will
D. Depend upon the characteristics of liquid
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A metal with specific gravity of a floating in a fluid of same specific gravity a will
D. Be fully immersed with top surface at fluid surface
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Surface energy per unit area of a surface is numerically equal to
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4
In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir.
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The line of action of the buoyant force acts through the
A. Centroid of the volume of fluid vertically above the body
B. Centre of the volume of floating body
C. Center of gravity of any submerged body
D. Centroid of the displaced volume of fluid
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Practical fluids
B. Possess surface tension
D. Possess all the above properties
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In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.
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Center of buoyancy is the
A. Centroid of the displaced volume of fluid
B. Center of pressure of displaced volume
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When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis ω rad/s, then depth of parabola which the liquid assumes is
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4
Mercury is often used in barometer because
B. The height of barometer will be less
C. Its vapour pressure is so low that it may be neglected
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The specific gravity of water is taken as
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The surface tension of mercury at normal temperature is __________ that of water.
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4
The discharge through a channel of rectangular section will be maximum, if
A. Its depth is twice the breadth
B. Its breadth is twice the depth
C. Its depth is thrice the breadth
D. Its breadth is thrice the depth
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4
According to Bernoulli's equation
A. Z + p/w + v²/2g = constant
B. Z + p/w - v²/2g = constant
C. Z - p/w + v²/2g = constant
D. Z - p/w - v²/2g = constant
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4
Dimensions of surface tension are
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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)
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In the case of steady flow of a fluid, the acceleration of any fluid particle is
D. Zero under limiting conditions
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A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.
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Reynold's number is the ratio of the inertia force to the
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4
The magnitude of water hammer depends upon the
A. Elastic properties of the pipe material
B. Elastic properties of the liquid flowing through the pipe
C. Speed at which the valve is closed
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4
If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water
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If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be
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4
Alcohol is used in manometers because
A. It has low vapour pressure
C. It has low surface tension
D. It can provide longer column due to low density
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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
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Manometer is used to measure
A. Pressure in pipes, channels etc.
D. Difference of pressure between two points
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Euler's equation in the differential form for the motion of liquids is given by
A. dp/ρ + g.dz + v.dv = 0
B. dp/ρ - g.dz + v.dv = 0
C. ρ.dp + g.dz + v.dv = 0
D. ρ.dp - g.dz + v.dv = 0