Related Questions
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A fluid which obeys the Newton's law of viscosity is termed as
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When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called
C. Positive gauge pressure
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Surface tension has the units of
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The horizontal component of buoyant force is
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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)
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Euler's number is the ratio of __________ force to pressure force.
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In order to measure the flow with a Venturimeter, it is installed in
B. Inclined line with flow upwards
C. Inclined line with flow downwards
D. Any direction and in any location
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The ratio of the inertia force to the elastic force is called
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The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at (ω) rad/s about its vertical axis, is
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In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)
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The viscosity of a liquid __________ its rate of flow through a hole in a vessel.
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In a static fluid
A. Resistance to shear stress is small
B. Fluid pressure is zero
C. Linear deformation is small
D. Only normal stresses can exist
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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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Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called
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The hydraulic mean depth for a circular pipe of diameter (d) is
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Which of the following instrument can be used for measuring speed of a submarine moving in deep sea?
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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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Kinematic viscosity is dependent upon
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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 measuring flow by a Venturimeter, if should be installed in
C. Inclined line with flow downward
D. In any direction and in any location
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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
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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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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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According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.
C. Inversely proportional
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In an isothermal atmosphere, the pressure
A. Decreases linearly with elevation
C. Varies in the same way as the density
D. Increases exponentially with elevation
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4
Rain drops are spherical because of
C. Surface tension forces
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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)
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A pressure of 25 m of head of water is equal to
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The pressure of the liquid flowing through the divergent portion of a Venturimeter
D. Depends upon mass of liquid
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The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.