Choose the wrong statement
A. Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force
B. Viscosity is due primarily to interaction between fluid molecules
C. Viscosity of liquids decreases with increase in temperature
D. Viscosity of liquids is appreciably affected by change in pressure
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Choose the wrong statement
A. The horizontal component of the hydrostatic force on any surface is equal to the normal force on the vertical projection of the surface
B. The horizontal component acts through the center of pressure for the vertical projection
C. The vertical component of the hydrostatic force on any surface is equal to the weight of the volume of the liquid above the area
D. The vertical component passes through the center of pressure of the volume
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Choose the wrong statement
A. Any weight, floating or immersed in a liquid, is acted upon by a buoyant force
B. Buoyant force is equal to the weight of the liquid displaced
C. The point through which buoyant force acts, is called the center of buoyancy
D. Center of buoyancy is located above the center of gravity of the displaced liquid
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Select the wrong statement
A. An equivalent pipe is treated as an ordinary pipe for all calculations
B. The length of an equivalent pipe is equal to that of a compound pipe
C. The discharge through an equivalent pipe is equal to that of a compound pipe
D. The diameter of an equivalent pipe is equal to that of a compound pipe
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Choose the wrong statement
A. The center of buoyancy is located at the center of gravity of the displaced liquid
B. For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy
C. If C.G. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions
D. All floating bodies are stable
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The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H))
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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.
A. Equal to
B. One-third
C. Two-third
D. Three-fourth
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In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be
A. Running full
B. Running free
C. Partially running full
D. Partially running free
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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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An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of
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The center of gravity of the volume of the liquid displaced by an immersed body is called
A. Center of gravity
B. Center of pressure
C. Metacenter
D. Center of buoyancy
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The resultant upward pressure of the fluid on an immersed body is called
A. Up-thrust
B. Buoyancy
C. Center of pressure
D. All the above are correct
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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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A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water?
A. 10 m/sec
B. 25 m/sec
C. 2 m/sec
D. 50 m/sec
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A pitot tube is used to measure the
A. Velocity of flow at the required point in a pipe
B. Pressure difference between two points in a pipe
C. Total pressure of liquid flowing in a pipe
D. Discharge through a pipe
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The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as
A. Manometric efficiency
B. Mechanical efficiency
C. Overall efficiency
D. Volumetric efficiency
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Which of the following is the unit of kinematic viscosity?
A. Pascal
B. Poise
C. Stoke
D. Faraday
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The process of diffusion of one liquid into the other through a semi permeable membrane is called
A. Viscosity
B. Osmosis
C. Surface tension
D. Cohesion
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Which of the following statement is correct?
A. In a compressible flow, the volume of the flowing liquid changes during the flow
B. A flow, in which the volume of the flowing liquid does not change, is called incompressible flow
C. When the particles rotate about their own axes while flowing, the flow is said to be rotational flow
D. All of the above
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A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?
A. The pressure on the wall at the liquid level is minimum
B. The pressure on the bottom of the wall is maximum
C. The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum
D. The pressure on the bottom of the wall is zero
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