Related Questions
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In a footstep bearing, if the radius of the shaft is doubled, then the torque required to overcome the viscous resistance will be
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4
An open vessel of water is accelerated up an inclined plane. The free water surface will
B. Make an angle in direction of inclination of inclined plane
C. Make an angle in opposite direction to inclination of inclined plane
D. Any one of above is possible
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4
When an internal mouthpiece is running free, the discharge through the mouthpiece is: (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)
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When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as
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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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A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is
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The flow in which each liquid particle has a definite path and their paths do not cross each other is called
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The center of pressure of a surface subjected to fluid pressure is the point
A. On the surface at which resultant pressure acts
B. On the surface at which gravitational force acts
C. At which all hydraulic forces meet
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Coefficient of resistance is 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. Loss of head in the orifice to the head of water available at the exit of the orifice
D. Actual discharge through an orifice to the theoretical discharge
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Specific weight of water in S.I. units is equal to
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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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The discharge in an open channel corresponding to critical depth is
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A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called
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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
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The value of mass density in kg-sec-V-m⁴ for water at 0°C 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 ratio of the inertia force to the elastic force is called
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The total energy line lies over the hydraulic gradient line by an amount equal to the
C. Pressure head + velocity head
D. Pressure head - velocity head
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The discharge through a wholly drowned orifice is given by (where H1 = Height of water (on the upstream side) above the top of the orifice, H2 = Height of water (on the downstream side) above the bottom of the orifice, and H = Difference between two water levels on either side of the orifice)
C. Q = Cd × b (H2 - H1) × √(2gh)
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The highest efficiency is obtained with a channel of __________ section.
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If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its
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One litre of water occupies a volume of
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A body floats in stable equilibrium
A. When its meatcentric height is zero
B. When the metacentre is above C.G.
C. When its e.g. is below its center of buoyancy
D. Metacentre has nothing to do with position of e.g. for determining stability
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The tendency of a liquid surface to contract is due to the following property
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The velocity of the liquid flowing through the divergent portion of a Venturimeter
D. Depends upon mass of liquid
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When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface.
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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
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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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The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is
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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,