85501. Poise is the unit of viscosity in C.G.S. system of units.
85502. The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.
85503. When the Mach number is more than 6, the flow is called
85504. The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.
85505. The separation of flow occurs when the hydrodynamic boundary layer thickness is reduced to zero.
85506. If the depth of water in an open channel is less than the critical depth, the flow is called
85507. A nozzle placed at the end of a water pipe line discharges water at a
85508. When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called
85509. The pressure at a stagnation point is always low.
85510. When an internal mouthpiece is running full, the discharge through the mouthpiece is twice the discharge when it is running free.
85511. In two dimensional flow, the flow does not take place in a curve.
85512. The ratio of the inertia force to the __________ is called Euler's number.
85513. Kinematic viscosity is the product of dynamic viscosity and the density of the liquid.
85514. A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a
85515. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance __________ from the liquid surface.
85516. A nozzle is generally made of
85517. The unit of surface tension is
85518. A notch is, usually, made of a metallic plate.
85519. In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free.
85520. A channel is said to be of most economical cross-section, if
85521. The top of the weir over which the water flows is known as
85522. A moving fluid mass may be brought to a static equilibrium position, by aplying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called
85523. The specific gravity of water is taken as
85524. A pitot tube is used to measure the
85525. The total head of a liquid particle in motion is equal to
85526. An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.
85527. The reciprocal of Euler's number is called Newton number.
85528. Bulk modulus of a fluid is the ratio of
85529. The pressure at a point 4 m below the free surface of water is
85530. A structure used to dam up a stream or river over which the water flows is called
85531. The coefficient of discharge for an external mouthpiece depends upon
85532. The depth of centre of pressure lor an immersed surface inclined at an angle θ with the liquid surface lies at a distance equal to __________ the centre of gravity.
85533. The highest efficiency is obtained with a channel of __________ section.
85534. A vessel of 4 m3 contains an oil which weighs 30 kN. The specific weight of the oil is
85535. Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)
85536. In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be
85537. The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.
85538. When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface.
85539. An orifice is said to be large, if
85540. The flow in a pipe or channel is said to be uniform when
85541. The density of a liquid in kg/m3 is numerically equal to its specific gravity.
85542. The critical depth meter is used to measure
85543. The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid)
85544. Froude's number is the ratio of inertia force to
85545. According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)
85546. When a liquid is flowing through a pipe, the velocity of the liquid is
85547. The pressure of fluid due to hammer blow is
85548. A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called
85549. A body floating in a liquid is said to be in neutral equilibrium, if its metacentre
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